RECOMMENDED FOR PUBLICATION
                               Pursuant to Sixth Circuit I.O.P. 32.1(b)
                                      File Name: 23a0179p.06

                    UNITED STATES COURT OF APPEALS
                                 FOR THE SIXTH CIRCUIT



                                                            ┐
 VON CLARK DAVIS,
                                                            │
                                Petitioner-Appellant,       │
                                                             >        No. 21-3404
                                                            │
        v.                                                  │
                                                            │
 CHARLOTTE JENKINS, Warden,                                 │
                               Respondent-Appellee.         │
                                                            ┘

  Appeal from the United States District Court for the Southern District of Ohio at Columbus.
                    No. 2:16-cv-00495—Susan J. Dlott, District Judge.

                                 Argued: December 13, 2022

                             Decided and Filed: August 16, 2023

                  Before: MOORE, COLE, and GIBBONS, Circuit Judges.

                                     _________________

                                           COUNSEL

ARGUED: Jordan S. Berman, OFFICE OF THE FEDERAL PUBLIC DEFENDER FOR THE
SOUTHERN DISTRICT OF OHIO, Columbus, Ohio, for Appellant. Jana M. Bosch, OFFICE
OF THE OHIO ATTORNEY GENERAL, Columbus, Ohio, for Appellee. ON BRIEF: Jordan
S. Berman, Erin G. Barnhart, OFFICE OF THE FEDERAL PUBLIC DEFENDER FOR THE
SOUTHERN DISTRICT OF OHIO, Columbus, Ohio, for Appellant. Stephen E. Maher,
OFFICE OF THE OHIO ATTORNEY GENERAL, Columbus, Ohio, for Appellee.

       MOORE, J., delivered the opinion of the court in which COLE, J., joined. GIBBONS, J.
(pp. 29–33), delivered a separate dissenting opinion.
 No. 21-3404                           Davis v. Jenkins                                    Page 2


                                      _________________

OPINION

                                      _________________

       KAREN NELSON MOORE, Circuit Judge. A three-judge panel convicted Von Clark
Davis of aggravated murder and sentenced him to death. On direct appeal, Davis’s sentence was
vacated, but on remand, the same three-judge panel again sentenced him to death.               We
subsequently vacated Davis’s death sentence on appeal of his first federal habeas petition. A
different three-judge panel again sentenced Davis to death. Davis again petitioned for a writ of
habeas corpus, and the district court denied the petition. Now on appeal, Davis raises five
claims: (1) that the state violated Davis’s constitutional rights by enforcing his 1984 jury waiver
against him at his third sentencing hearing in 2009; (2) that Davis’s trial counsel were
constitutionally ineffective in failing to investigate and present mitigating evidence about the
circumstances of Davis’s prior conviction, which provided the aggravating circumstance that
made him eligible for the death penalty; (3) that Davis’s trial counsel provided ineffective
assistance by failing to move to recuse one of the judges on Davis’s 2009 sentencing panel for
bias; (4) that Davis’s trial counsel were constitutionally ineffective in failing to reasonably
prepare and present mitigation evidence at Davis’s third sentencing hearing; and (5) that Davis’s
trial counsel provided ineffective assistance by failing adequately to advise him of the collateral
consequences of a jury waiver.       For the reasons that follow, we conclude that Davis’s
constitutional rights were violated when his 1984 jury waiver was enforced against him at his
2009 sentencing hearing and that his trial counsel also rendered ineffective assistance at that
sentencing hearing, such that we doubt that the hearing produced a fair result. Accordingly, we
AFFIRM in part; REVERSE in part; and REMAND to the district court with instructions to
CONDITIONALLY GRANT Davis’s petition for writ of habeas corpus as to his first, third,
and fourth claims.
 No. 21-3404                          Davis v. Jenkins                                    Page 3


                                      I. BACKGROUND

A. Procedural History

       In January 1984, a grand jury indicted Davis for aggravated murder (accompanied by
capital and firearm specifications) and possessing a firearm while under a disability. After Davis
waived his right to a trial by jury, a three-judge panel convicted him on all counts and sentenced
him to death. On direct appeal, Davis’s convictions were affirmed, but his death sentence was
vacated. State v. Davis, No. CA84-06-071, 

 (Ohio Ct. App. May 27, 1986) (Davis
I), rev’d in part, 

 (Ohio 1988) (Davis II). On remand, the same three-judge panel
held a second sentencing hearing and again sentenced Davis to death, which was affirmed on
appeal. State v. Davis, No. CA89-09-123, 

 (Ohio Ct. App. Oct. 29, 1990)
(Davis III), aff’d, 

 (Ohio 1992) (Davis IV).

       The state trial court dismissed Davis’s postconviction petition after conducting a limited
evidentiary hearing. R. 4-20 (Entry of Dismissal at 1–9) (Page ID #2158–66) (Davis V). The
Ohio Court of Appeals affirmed. State v. Davis, No. CA95-07-124, 

 (Ohio Ct.
App. Sept. 30, 1996) (Davis VI). The Ohio Supreme Court declined further review. State v.
Davis, 

 (Ohio 1997) (table) (Davis VII). Davis’s two motions to reopen his direct
appeal were dismissed as untimely. State v. Davis, 

 (Ohio 1999) (Davis VIII).

       In April 1997, Davis filed his first federal habeas petition, and the district court denied
relief. R. 16-2 (2001 D. Ct. Op. & Order at 1–87) (Page ID #8947–9032) (Davis IX). On appeal,
this court vacated Davis’s death sentence. Davis v. Coyle, 

 (6th Cir. 2007) (Davis
X). Then in the state court, a different three-judge panel conducted a third sentencing hearing
and sentenced Davis to death, which was affirmed on appeal. State v. Davis, No. CA2009-10-
263, 

 (Ohio Ct. App. Feb. 22, 2011) (Davis XI), aff’d, 

 (Ohio
2014) (Davis XIV). Davis unsuccessfully sought postconviction relief in state court. R. 4-47
(Entry & Order Dismissing Pet. Postconviction Relief at 1–18) (Page ID #6633–50) (Davis XII);
State v. Davis, No. CA2012-12-258, 

 (Ohio Ct. App. Sept. 9, 2013) (Davis
XIII). The Ohio Supreme Court declined further review. State v. Davis, 

 (Ohio
2015) (table) (Davis XV).
 No. 21-3404                          Davis v. Jenkins                                  Page 4


       In August 2016, Davis filed a second-in-time habeas petition raising twenty-six claims of
constitutional error. R-6 (Pet. for Writ of Habeas Corpus) (Page ID #8563–838). The district
court dismissed the petition and certified several claims for appeal. R. 64 (Order Adopting R. &
R. in Part & Den. Pet.) (Page ID #10022–74). This court subsequently expanded the COA to
certify a total of seven claims for appeal. Davis now timely appeals.

B. Relevant Facts

       1. The Offense

       The Ohio Supreme Court summarized the facts as follows:

       {¶2} On December 12, 1983, Davis offered Mark “Poppa” Lovette $60 in
       exchange for a favor. He then drove Lovette to a pawn shop, where Lovette
       bought a Raven P.25 semi-automatic handgun using Davis’s money. Lovette
       gave the gun to Davis. Davis then gave Lovette more money and took him to a
       different store to buy ammunition.
       {¶ 3} When Davis discovered that the ammunition did not fit the Raven, he took
       Lovette to a local gun store. There, Lovette bought a box of PMC .25–caliber
       automatic rounds, which he gave to Davis. Davis loaded the Raven and placed it
       under the driver’s seat. After dropping Lovette off, Davis and Wade Coleman
       rode around drinking beer for 30 minutes to an hour.
       {¶ 4} Later that day, Suzette Butler met her friend, Mona Aldridge, at the
       American Legion post in Hamilton. Shortly thereafter, Davis arrived. Davis and
       Butler had lived together for a time but had recently separated. Davis spoke with
       Butler at the bar, and eventually they sat together at a table and Aldridge joined
       them. Aldridge testified at trial that she did not observe any argument or harsh
       words between them.
       {¶ 5} After a short time, Butler told Aldridge that she would be “right back” and
       asked Aldridge to watch her jacket, cigarettes, and drink. Davis and Butler then
       walked out the front door. Several minutes later, Aldridge checked on Butler, saw
       Davis pointing a gun at Butler’s head, and panicked and retreated into the bar.
       Within moments, several people entered the bar saying that someone had been
       shot.
       {¶ 6} Reginald Denmark and Cozette Massey witnessed the shooting. As they
       walked in front of the American Legion post, they saw a man and a woman
       talking. Two shots rang out, and they saw the woman—later identified as
       Butler—fall. As she fell, another shot was fired. Finally, once Butler was down,
       the man bent down and shot her in the head. Both Massey and Denmark
       identified Davis as the shooter.
 No. 21-3404                              Davis v. Jenkins                                Page 5


       {¶ 7} An autopsy performed the next day revealed that Butler had died of
       multiple gunshot wounds to the left side of her head. Stippling around one of the
       entrance wounds indicated that the muzzle of the murder weapon had been less
       than 20 inches from Butler’s head when the shot causing that wound had been
       fired.
       {¶ 8} Four spent PMC shell casings were collected at the murder scene. Ronald
       Dye, a criminalist with the Ohio Bureau of Criminal Identification and
       Investigation, examined the shells and concluded that all four had been
       chambered in the same gun. Dye examined the four bullets removed from
       Butler’s head and determined that they had been fired from a handgun
       manufactured by either Raven or Astra.

Davis XIV, 9 N.E.3d at 1036–37.

       2. Aggravating Circumstance

       The aggravating circumstance that made Davis eligible for the death penalty was the fact
that he had previously “been convicted of an offense an essential element of which was the
purposeful killing of, or attempt to kill, another.” Davis II, 

 (citing OHIO REV.
CODE ANN. § 2929.04(A)(5)). Namely, he had pleaded guilty in 1971 “to second degree murder
in connection with the stabbing death of his estranged wife, Ernestine Davis.” Davis VI, 

, at *1. Several years later, a man named Robert J. Beard wrote a letter to H.J.
Bressler, Davis’s trial counsel in the second-degree murder case, stating that Beard had been in a
house with Ernestine on the day of her death, and was there when Davis arrived. Id. at *4; R. 4-
19 (1993 Postconviction Pet. Ex. CC) (Page ID #2028–29). The letter suggested that Ernestine
initiated the confrontation with Davis:

       [Ernestine] cursed to me about being tired of that bastard and would stick him.
       She withdrew a large knife from under the mattress and swore she would use it.
       . . . They were arguing in the kitchen, and when it became very loud I decided to
       leave coming down the stairs I remember him asking her why did she have a
       knife? Moving toward the door I saw Ernestine strike at Von with the knife, and
       then heard wrestling. To be honest with you, Ernestine was the aggressor and not
       Von, he was trying to talk to her. I couldn’t see much more, only heard Ernestine
       yelling that she would kill him. . . . I know it wasn’t premeditation because he
       did not have a knife with him, the knife that killed Ernestine was the knife she
       withdrew from the mattress, because I saw it.
 No. 21-3404                            Davis v. Jenkins                                    Page 

-19 (1993 Postconviction Pet. Ex. CC) (Page ID #2028–29). Davis’s postconviction counsel
following his second sentencing argued that this letter demonstrated mitigating circumstances
regarding the statutory aggravator and that trial counsel were therefore ineffective for failing to
investigate and present mitigating evidence about the prior conviction that made Davis eligible
for the death penalty. R. 4-18 (1993 Postconviction Pet.) (Page ID #1925–27).

       3. Jury Waiver and Composition of the Three-Judge Panel

       In advance of his initial trial in 1984, Davis waived his right to a jury trial and instead
elected to be tried by a three-judge panel. R. 4-3 (Jury Waiver & Election of Three-Judge Panel)
(Page ID #433). The waiver form, signed by Davis, his counsel, and the initial trial judge, stated
that Davis “voluntarily waive[d] [his] right to trial by jury and elect[ed] to be tried by a court to
be composed of three judges, consisting of Judges Henry H. Bruewer, William R. Stitsinger, and
John R. Moser.” 

 Although the prosecutor did not sign the waiver agreement, it was typed on
his letterhead, 

 and the prosecutor had previously agreed in a pretrial motions hearing to
prepare the written waiver. R. 5-1 (Mot. Hr’g Tr. at 37–38) (Page ID #7204–05). At the waiver
colloquy, the presiding judge again reiterated the names of the three judges that would form the
panel. Id. at 61 (Page ID #7225).

       By the time of Davis’s third sentencing hearing in 2009, however, one of the judges from
the original panel had died, and the other two had retired. Davis XI, 

, at *2.
The sentencing court did not allow Davis to withdraw his original jury waiver from 1984, and
instead enforced it against him. 

 He was thereafter sentenced to death by a new three-judge
panel. 

       One of the judges on the new three-judge panel, Judge Nastoff, had previously worked as
a prosecutor. R. 5-7 (3d Sent’g Hr’g Tr. at 131) (Page ID #8321). During his time as a
prosecutor, Judge Nastoff had been on the prosecution team that sought a death sentence against
Lahray Thompson, Davis’s nephew.          

   Judge Nastoff himself “argued to the jury that
[Thompson] should receive the death sentence.” 

 In doing so, Judge Nastoff repeatedly told
jurors that Thompson lied. R. 4-46 (2011 Postconviction Pet. Ex. N at 1207) (Page ID #6458).
Davis alleges that during his prosecution of Thompson, Judge Nastoff “heard and cross
 No. 21-3404                           Davis v. Jenkins                                    Page 7


examined some of the very same mitigation evidence that Davis presented in his case.” R. 4-46
(2011 Postconviction Pet. Ex. D, Menashe Aff. ¶ 23) (Page ID #6279).              At Davis’s third
sentencing hearing, over which Judge Nastoff presided, Davis presented mitigation testimony
from his sister, Carol Smith, who is Thompson’s mother. R. 5-7 (3d Sent’g Hr’g Tr. at 131)
(Page ID #8321). Judge Nastoff made the parties aware of his involvement in Thompson’s case
after the panel heard Smith’s testimony. 

 Davis’s counsel responded that, “[i]n the interest of
full candor, we were aware that Your Honor, that you were involved in the prosecution, and we
made a decision long ago not to challenge you on that.” Id. at 132 (Page ID #8322). In a
postconviction affidavit, Davis averred that his trial counsel “did not discuss at all with” him the
decision not to seek the recusal of Judge Nastoff and that, had he been asked, he would have
wanted them to seek Judge Nastoff’s recusal. R. 4-46 (2011 Postconviction Pet. Ex. B, Davis
Aff. ¶ 8) (Page ID #6271).

       4. Mitigation Evidence at Davis’s Third Sentencing Hearing

       During opening argument at Davis’s third sentencing hearing, his trial counsel promised
that Cynthia Mausser, Chair of the Ohio Parole Board, would “testify based upon [Davis’s] prior
record, the fact that he committed the second murder, while he was still on parole from the first
murder is that he will not be paroled.” R. 5-7 (3d Sent’g Hr’g Tr. at 36–37) (Page ID #8225–26).
Later in opening argument, his trial counsel again reiterated that, “we will note from Ms.
Mausser’s testimony that he will never be paroled.” Id. at 38 (Page ID #8227). The issue of
parole was critical because, under Ohio law in effect at the time of the offense, if the panel
declined to impose a death sentence, the maximum available sentence would be thirty years to
life, which would make Davis eligible for parole six years after the 2009 sentencing hearing. Id.
at 36 (Page ID #8225).

       The prosecution objected to Davis calling Mausser, stating that:

       Ms. Mausser herself could not testify and has told me that she would not be in a
       position to be able to testify whether or not she would vote for parole or not vote
       for parole, it would be improper for her to say that she could not say what a
       majority of the board would do as they are not here. None of the board members,
       even if all seven or twelve were present would be able to say how they would vote
 No. 21-3404                          Davis v. Jenkins                                  Page 8


       because this case is not in front of them.        ...   The entire thing would be
       speculation.

Id. at 133–34 (Page ID #8323–24). Davis’s counsel responded that “we will be in a position of
surprise and affirmative damage if she testifies as the prosecution is suggesting because we, in
fact, interviewed her four months ago and Ms. Cook will testify, if necessary, that that is not
what we were told.” Id. at 137 (Page ID #8327). The panel allowed Mausser to testify. Id. at
144–45 (Page ID #8334–35).          When Davis’s trial counsel posed a hypothetical with
circumstances similar to Davis’s case, Mausser responded that the individual “would likely
spend a large portion of the remainder of their life in prison.” Id. at 175 (Page ID #8365). On
cross-examination, Mausser agreed that she did not have all the information necessary to know
how she would vote on Davis’s case, were it to be presented to the parole board, nor could she
say how other board members would vote. Id. at 181–82, 184–85, 188–89 (Page ID #8371–72,
8374–75, 8378–79). In an affidavit obtained by postconviction counsel, Mausser averred that
she “never told defense counsel that Mr. Davis would never be paroled.”          R. 4-46 (2011
Postconviction Pet. Ex. F, Mausser Aff. ¶ 4) (Page ID #6365).

       Trial counsel later called Dr. Robert Smith, a clinical psychologist. R. 5-8 (3d Sent’g
Hr’g Tr. at 230) (Page ID #8420). Dr. Smith opined that, at the time of the offense, Davis was
suffering from alcohol dependence and borderline personality disorder. Id. at 248 (Page ID
#8438). Regarding borderline personality disorder, Dr. Smith testified that:

       And within the institution he does well, which we would expect with someone
       with a personality disorder. Think about it. I am saying that you have got this
       dysfunctional style. If you put me in a very structured environment, with clear-
       cut rules and people who enforce those rules every day, the same way, I will adapt
       and I will adjust. My problem with borderline personality disorder is if I am in
       the community where I have no clear structure and I am reacting to whatever is
       happening to me throughout the day.

Id. at 258 (Page ID #8448). He further testified that a characteristic of borderline personality
disorder is “unwarranted aggressive behavior that comes about with minor provocation” that is
“out of proportion.” Id. at 261 (Page ID #8451). Dr. Smith opined that impulsivity and
reactivity characterized borderline personality disorder and that individuals diagnosed with it
“act and then think about it afterwards” and do not consider “what the consequences will be” but
 No. 21-3404                            Davis v. Jenkins                                     Page 9


just “act out again based on what they are feeling.” Id. at 263 (Page ID #8453). In an affidavit
obtained by postconviction counsel, Dr. Smith stated that trial counsel did not tell him that parole
was an issue in the case and that, had he known, he could have testified about how Davis “has
learned to accept external rules and expectations regarding his behavior” and that he has
developed coping strategies and can “weigh the potential consequences of his decisions and
actions.” R. 4-46 (2011 Postconviction Pet. Ex. I, Smith Aff. ¶¶ 11–12) (Page ID #6382).

                                          II. ANALYSIS

A. Standard of Review

       We review de novo a district court’s decision to grant or deny a writ of habeas corpus.
Foust v. Houk, 

 (6th Cir. 2011). Under the Antiterrorism and Effective Death
Penalty Act of 1996 (“AEDPA”), a federal court may grant a writ of habeas corpus “with respect
to any claim that was adjudicated on the merits in State court proceedings” only if the state court
decision “was contrary to, or involved an unreasonable application of, clearly established Federal
law, as determined by the Supreme Court of the United States” or “was based on an
unreasonable determination of the facts in light of the evidence presented in the State court
proceeding.” 

(d). “Where the state court fails to adjudicate a claim on the
merits, however, AEDPA’s deferential standard of review does not apply.”                 Williams v.
Anderson, 

 (6th Cir. 2006).

       A state-court decision is contrary to clearly established federal law if “the state court
applies a rule that contradicts the governing law set forth in [the Supreme Court’s] cases” or “if
the state court confronts a set of facts that are materially indistinguishable from a decision of [the
Supreme Court] and nevertheless arrives at a result different from [Supreme Court] precedent.”
Williams v. Taylor, 

, 405–06 (2000). A state-court decision unreasonably applies
clearly established federal law if it “correctly identifies the governing legal rule but applies it
unreasonably to the facts of a particular prisoner’s case.” 

 at 407–08.

       Clearly established federal law “refers to the holdings, as opposed to the dicta, of
[Supreme Court] decisions as of the time of the relevant state-court decision.” 

.
“Although courts of appeals’ decisions do not establish new rules, the court may look to such
 No. 21-3404                            Davis v. Jenkins                                  Page 10


decisions to inform its analysis of whether a legal principle had been clearly established by the
Supreme Court.” Avery v. Prelesnik, 

, 436–37 (6th Cir. 2008).

B. Jury Waiver

          1. Exhaustion

          “Exhaustion requires ‘fair presentation’ of the federal claim ‘to the state courts.’”
Williams v. Mitchell, 

 (6th Cir. 2015) (quoting Bray v. Andrews, 

,
734–35 (6th Cir. 2011)). “To fairly present a federal claim, a state prisoner is required to present
the state courts with ‘both the legal and factual basis’ for the claim.” 

 (quoting Anderson, 

) (emphasis in original). Put differently, the petitioner must have presented the state
courts with “a claim substantially equivalent to the [federal] claim.” Jalowiec v. Bradshaw, 

 (6th Cir. 2011) (internal citations and quotation marks omitted).

          Davis presented both the legal and factual basis for this claim in state court. On direct
appeal of his third sentencing in the Ohio Court of Appeals, Davis’s brief argued that the state
“violate[d] Due Process and the Eighth and Sixth Amendment” by enforcing the jury waiver
from 1984 “when the law has changed and the facts have changed.” R. 4-42 (Direct Appeal
Merit Br. at 4) (Page ID #5496). The brief also presented the factual basis for the claim, noting
that Davis was sentenced by a panel consisting of different judges than he had agreed to in his
original jury waiver. Id. at 6 (Page ID #5498). Davis’s brief in the Ohio Supreme Court also
extensively covered both the legal and factual bases of this claim. R. 4-43 (Ohio Sup. Ct. Merit
Br. at 4–20) (Page ID #5859–75). Davis therefore properly exhausted this claim in the state
courts.

          2. AEDPA Deference

          Davis claims that the Ohio Supreme Court unreasonably applied clearly established
federal law in determining that the sentencing court’s enforcement of his 1984 jury waiver
against him at his third sentencing hearing did not violate the federal constitution. In its
decision, the Ohio Supreme Court concluded that “although the Sixth Amendment guarantees the
right to trial by jury, neither the Sixth nor the Eighth Amendment creates a constitutional right to
 No. 21-3404                           Davis v. Jenkins                                  Page 11


be sentenced by a jury, even in a capital case.” Davis XIV, 

. The Ohio Supreme
Court relied on the Supreme Court’s decision in Spaziano v. Florida, 

 (1984), in
reaching this conclusion. Thus, the Ohio Supreme Court determined that a capital defendant
could be sentenced to death without a jury, even absent any waiver. 

 The court further held
that the changed circumstances (i.e., the new three-judge panel) did not have any constitutional
implications for Davis’s waiver, because that would require that a defendant “possess more
information than courts have usually held sufficient for a knowing and intelligent jury waiver.”

        The Ohio Supreme Court unreasonably applied clearly established federal law to Davis’s
jury claim. First, the Supreme Court’s decisions in Ring v. Arizona, 

 (2002), and
Apprendi v. New Jersey, 

 (2000), established the constitutional right to have a jury
decide the factual findings necessary to impose a death sentence. As the Supreme Court has
held:

        Spaziano and Hildwin summarized earlier precedent to conclude that “the Sixth
        Amendment does not require that the specific findings authorizing the imposition
        of the sentence of death be made by the jury.” Their conclusion was wrong, and
        irreconcilable with Apprendi. Indeed, today is not the first time we have
        recognized as much.

Hurst v. Florida, 

 (2016) (quoting Hildwin v. Florida, 

, 640–41
(1989)). Although Hurst was decided after Davis’s third sentencing in 2009, both Ring and
Apprendi preceded the 2009 sentencing hearing. And the Supreme Court made explicit in Hurst
that Ring, decided in 2002, had already clearly established this constitutional right: “In Ring, we
held that another pre-Apprendi decision—Walton—could not ‘survive the reasoning of
Apprendi.’” 

 (quoting Ring, 

) (internal citation omitted). Thus, the Ohio
Supreme Court’s decision that a capital defendant can be sentenced to death without a jury, even
absent any waiver, because there is no constitutional right to jury factfinding in capital
sentencing, was an unreasonable application of then clearly established federal law. Once a
petitioner’s claim overcomes the relitigation bar imposed by 

(d), we apply de
novo review, because no deference is owed to a state-court decision premised upon an
 No. 21-3404                            Davis v. Jenkins                               Page 12


unreasonable application of clearly established federal law. See Rice v. White, 

(6th Cir. 2011).

       Second, although the Ohio Supreme Court briefly discussed whether changed
circumstances between 1984 and 2009 impacted the knowing and intelligent nature of his
waiver, it failed to discuss the constitutional implications of enforcing a waiver against Davis
even though the state did not comply with the express language of the waiver, instead relying
solely on Spaziano to dispose of Davis’s claim. See Davis XIV, 

. We have
previously held that when a state court relies on one component of a claim to adjudicate the
claim on the merits, we review de novo the component of the claim that state court did not
address. Rayner v. Mills, 

 (6th Cir. 2012). We explained that this comported
with the rule of Harrington v. Richter, 

 (2011), because “the Supreme Court
expressly limited application of its holding [in Richter] to cases in which the state court’s
decision ‘is unaccompanied by an explanation.’” Rayner, 

 (quoting Sussman v.
Jenkins, 

 (6th Cir. 2011)). We also noted that this approach ensured harmony
with the Supreme Court’s prior decisions in Wiggins v. Smith, 

 (2003), and
Rompilla v. Beard, 

 (2005), both of which “recognized that the AEDPA standard
applies to the ‘claim’ of ineffective assistance of counsel before evaluating an unreviewed prong
de novo.” Rayner, 

. Because the state court did not adjudicate the merits of
Davis’s claim as to the due-process implications of the violation of the terms of his written
waiver agreement, we apply de novo review to that portion of his claim. We therefore review de
novo Davis’s entire jury waiver claim, given that part of his claim was not adjudicated on the
merits in state court, and the other part of his claim was adjudicated based on an unreasonable
application of clearly established federal law.

       3. Enforcement of Jury Waiver

       Davis claims that his rights under the Due Process Clause and the Sixth and Eighth
Amendments were violated when his 1984 jury waiver was enforced against him at his third
sentencing hearing in 2009, because the state did not comply with the plain terms of the waiver
agreement, which named the three judges who would try and sentence him.
 No. 21-3404                           Davis v. Jenkins                                   Page 13


       In determining whether the enforcement of Davis’s waiver against him in 2009 was valid,
we are guided by the Supreme Court’s instruction that, because “the right of jury trial is
fundamental, courts indulge every reasonable presumption against waiver.” Aetna Ins. Co. v.
Kennedy to Use of Bogash, 

 (1937). The Court has held that waivers of
constitutional rights “are essentially contracts,” although “the analogy may not hold in all
respects.” Puckett v. United States, 

 (2009). If the government “takes on
certain obligations” in a waiver agreement, and “those obligations are not met, the defendant is
entitled to seek a remedy.” 

 Because the waiver of a constitutional right is involved, a breach
of a waiver agreement has constitutional dimensions. See United States v. Barnes, 

 (6th Cir. 2002). We have previously held that “a defendant has a due process right to hold
the government to the promises it made that induced him to” waive the right. United States v.
Warren, 

 (6th Cir. 2021). It therefore follows that Davis has the right to require
the state to comply with the terms of the jury-waiver agreement or, in the alternative, to
withdraw his waiver. Cf. Sinistaj v. Burt, 

 (6th Cir. 1995) (denying analogous
habeas claim because petitioner’s jury waiver did not specify that it applied only to a trial before
a particular named judge).

       The warden raises the fact that the prosecutor did not sign the jury waiver form, although
it was prepared by the prosecutor and written on the prosecutor’s letterhead. It was, however,
signed by one of the trial judges. R. 4-3 (Jury Waiver & Election of Three-Judge Panel) (Page
ID #433). Although a prosecutor’s signature may be significant for the enforcement of a plea
agreement, we note that, despite some similarities between a jury waiver and a plea agreement,
the analogy does not hold in all respects. See Puckett, 

. In the typical case
involving a plea-agreement violation, it is the prosecution’s refusal to honor a condition to which
it explicitly agreed that forms the basis for the defendant’s constitutional claim. See, e.g.,
Barnes, 278 F.3d at 646–48 (finding violation where prosecution agreed to recommend
defendant be sentenced at the low end of the guidelines but subsequently failed to state the
recommendation on the record at defendant’s sentencing hearing); Warren, 

(finding violation where prosecution agreed not to “suggest in any way” that a variance from the
sentencing guidelines range was appropriate but then suggested to the sentencing court that it
would have made different guidelines recommendations had it known about other facts regarding
 No. 21-3404                                   Davis v. Jenkins                                            Page 14


defendant’s criminal history).           Here, however, the violation did not occur because of the
prosecutor’s conduct, but instead because the trial court enforced the waiver against Davis
without holding up its end of the bargain regarding the composition of the three-judge panel.1
Because a judge of that same trial court agreed to the terms of Davis’s jury waiver, including the
composition of the panel, and signed the waiver agreement, the prosecution’s lack of signature
has no effect on Davis’s claim. Davis’s due-process rights were therefore violated by the
enforcement of the waiver against him at his 2009 resentencing, in breach of the explicit terms of
his waiver.

         The dissent criticizes our conclusion, incorrectly claiming that we “transform[] a waiver
of jury trial into a waiver of jury trial only if three particular judicial officers make the
sentencing decision.” Dissent at 29. This misrepresents our decision. As a practical matter,
almost all jury waiver agreements do not specify the judge or judges that will hear a case, and
thus our conclusion here will have no bearing on cases involving such agreements. If the state
does not wish to be bound by the requirement that certain judges will hear a case, it can simply
choose not to include such language in any agreements involving the waiver of a defendant’s
constitutional rights. Thus, we do not conclude that there is a “constitutional right to have a
particular judge make any decision.” Dissent at 29. We simply hold, as has always been the
case, that if a defendant waives a constitutional right in exchange for certain obligations, those
obligations must be met if the waiver is to be enforced.

         4. Prejudice

         It is an open question in our circuit whether Davis must satisfy the prejudice requirements
of Brecht v. Abrahamson, 

 (1993), in order to obtain relief on this claim.
When such a claim is raised on direct appeal, automatic reversal is required so long as the
defendant preserved their objection to the waiver-agreement violation. Puckett, 

;
Warren, 8 F.4th at 450–51. This suggests that the violation of a jury-waiver agreement is per se
reversible error and thus a habeas petitioner need not meet the requirements of Brecht to obtain

         1
           Although it is not dispositive of the issue, we note that the jury-waiver agreement at issue in Sinistaj was
signed by the defendant and his trial counsel only. 

. In analyzing the issue, this court did not discuss
the fact that the agreement was not signed by the prosecution or by the trial court.
 No. 21-3404                             Davis v. Jenkins                                    Page 15


relief. See Spytma v. Howes, 

 (6th Cir. 2002) (concluding that, on habeas
review, while a claim of ineffective assistance of counsel regarding jury-waiver issues is subject
to a prejudice analysis, “the actual jury waiver issue is arguably not subject to harmless error
analysis”). And not requiring a showing of prejudice under Brecht makes sense given that the
violation involved a denial of the jury-trial right, the deprivation of which the Supreme Court has
held “unquestionably qualifies as ‘structural error.’” Sullivan v. Louisiana, 

(1993).

          We need not decide this issue, however, because Davis has demonstrated prejudice under
the Brecht standard. Brecht requires a showing that the error had a “substantial and injurious
effect or influence” on the outcome of the proceedings. 

; see also Fry v. Pliler,

, 121–22 (2007). As a result of the enforcement of Davis’s jury waiver against him
at his third sentencing hearing, Davis was sentenced to death by a panel that included a judge
with a risk of actual bias that is too high to be constitutionally tolerable. See infra section II.D.1.
This alone was enough to have a substantial and injurious effect on the outcome of the
proceedings, because it ensured that Davis was sentenced by a court that was structurally
deficient. We conclude that Davis is entitled to relief on this claim.

C. Ineffective Assistance of Counsel for Failing to Investigate the Circumstances of
   Davis’s Prior Conviction

          Next, Davis contends that his trial counsel were constitutionally ineffective for failing to
investigate and present mitigating evidence about the circumstances of his prior conviction,
which formed the death specification for his capital conviction. The warden argues that Davis
failed to exhaust this claim in state court and that, as a result, it is procedurally defaulted. See 

(b)(1)(A). Davis first raised this claim in his state postconviction proceedings
following his second sentencing. R. 4-18 (1993 Postconviction Pet.) (Page ID #1925–27). The
Ohio Court of Appeals held that the claim was barred by res judicata because Davis did not raise
it on direct appeal even though Beard’s “letter was time-stamped for the record by the clerk’s
office in 1981,” and had precipitated the filing of a new-trial motion for his prior conviction for
second-degree murder. Davis VI, 

, at *4. Davis did not raise this claim in his
state postconviction proceedings following his third sentencing in 2009.              R. 4-46 (2011
 No. 21-3404                            Davis v. Jenkins                                Page 16


Postconviction Pet.) (Page ID #6236–64). Davis argues that, because our decision in Davis X
granted relief as to only his sentence, his conviction was left in place and thus he properly
exhausted this claim by presenting it to the state courts in his postconviction petition following
his second sentencing. Appellant Reply Br. at 11–12.

       The warden cites King v. Morgan, 

 (6th Cir. 2015), for the proposition
that Davis’s claim is unexhausted. King, however, dealt with the question of whether a second-
in-time federal habeas petition following a new judgment constituted a “second or successive”
petition such that the limitations of 

 apply. 

 at 156–57. In answering that
question in the negative, we simply reminded petitioners that “[a]ll habeas petitioners, including
King on remand, must show that they did not procedurally default each claim and that they
exhausted each claim.” Id. at 160. That statement does not answer the question of what is
necessary to meet the exhaustion requirement when a second judgment has been entered relating
to a petitioner’s already-existing conviction.

       But we need not answer the question of whether a habeas petitioner must raise claims
relating to their conviction anew in state-postconviction proceedings following a new sentencing
judgment in order to meet the exhaustion requirement, because Davis’s claim relates to his
sentence and thus is plainly unexhausted following his third sentencing. Although Davis’s
federal habeas petition raised this claim as relating to his conviction, R. 6 (Pet. for Habeas
Corpus at 152–55) (Page ID #3725–28), and the district court understood it as such, R. 64 (Order
Adopting R. & R. in Part & Den. Pet. at 45–47) (Page ID #10066–68), Davis’s brief in this court
focuses exclusively on the impact of his trial counsel’s alleged deficiencies at his sentencing
hearing. See Appellant Br. at 46–48. Because Davis’s opening brief did not raise the argument
that this claim related to his conviction, he has waived that argument. See Sanborn v. Parker,

 (6th Cir. 2010). And the argument is unexhausted as to Davis’s sentence,
because he did not raise it again in his state-postconviction proceedings following his third
sentencing, despite being represented by different counsel at his third sentencing hearing than at
his second sentencing hearing. R. 4-46 (2011 Postconviction Pet. ¶¶ 9, 25) (Page ID #6237,
6239). The factual basis for the claim was thus not presented to the state courts, as required by
 No. 21-3404                            Davis v. Jenkins                                 Page 17


the exhaustion doctrine. See Williams, 

. We therefore hold that this claim is
procedurally defaulted.

D. Ineffective Assistance of Counsel for Failing to Move to Recuse a Judge for Bias

       Davis claims that trial counsel at his third sentencing hearing were constitutionally
ineffective for failing to move to recuse Judge Nastoff for bias or the appearance thereof, given
his prosecution of Davis’s nephew. The Ohio Court of Appeals concluded that trial counsel’s
decision not to seek Judge Nastoff’s recusal was strategic and therefore it did not constitute
ineffective assistance of counsel. Davis XIII, 

, at *6. Because the Ohio Court
of Appeals adjudicated this claim on the merits, the deference requirements of § 2254(d) apply.

       To demonstrate ineffective assistance of counsel, a petitioner typically must show “that
counsel’s performance was deficient” and “that the deficient performance prejudiced the
defense.” Strickland v. Washington, 

 (1984). We, however, have held that
because “judicial bias is a structural defect both when actual and when merely unconstitutionally
probable, if either type of judicial bias is proven, Strickland prejudice need not be proven.”
Coley v. Bagley, 

 (6th Cir. 2013) (internal citation omitted). The operative
questions, therefore, are whether Judge Nastoff’s potential for bias violated due process, and, if
so, whether the Ohio Court of Appeals unreasonably applied federal law in determining that trial
counsel’s decision not to seek recusal was strategic. See Kimmelman v. Morrison, 

 (1986) (holding that, if trial counsel’s failure to litigate a constitutional claim competently
“is the principal allegation of ineffectiveness,” petitioner must also prove that the underlying
constitutional claim is meritorious).

       1. Judicial Bias

       The Ohio Court of Appeals did not address the issue of whether Judge Nastoff’s potential
bias rose to the level of constitutional error and instead simply decided that the decision of
Davis’s trial counsel not to seek Judge Nastoff’s recusal was strategic. We therefore review de
novo the judicial-bias portion of Davis’s claim. See Rayner, 685 F.3d at 638–39 (holding that
when a state court reviews only one portion of a claim in disposing of the claim, we review de
novo any portions of the claim that the state court did not review). The dissent confusingly
 No. 21-3404                            Davis v. Jenkins                                 Page 18


argues that “Davis’s claim fails on AEDPA review. . . because it is not clearly established federal
law that a judge’s prior involvement in the prosecution of a defendant’s family member creates
‘an impermissible risk of actual bias’ in the defendant’s case.” Dissent at 30–31 (quoting
Williams v. Pennsylvania, 

 (2016)). But such a showing is not required, because the
Supreme Court has confirmed that when no “state courts below [have] reached” a prong of a
petitioner’s claim, “our review is not circumscribed by” AEDPA’s requirements. Wiggins, 

. The dissent offers no reason that the Supreme Court’s guidance in Wiggins and our
prior precedent in Rayner ought not to apply here. Instead, the dissent simply assumes that
AEDPA deference applies despite the fact that no state court reviewed the judicial bias portion of
Davis’s claim. Seeing no reason not to apply the rule of Wiggins and Rayner, we review de novo
this prong of Davis’s claim.

          The Supreme Court has held that judicial bias violates due process when “the probability
of actual bias on the part of the judge or decisionmaker is too high to be constitutionally
tolerable.” Withrow v. Larkin, 

 (1975). The standard is objective, and thus
courts ask “not whether the judge is actually, subjectively biased, but whether the average judge
in his position is ‘likely’ to be neutral, or whether there is an unconstitutional ‘potential for
bias.’” Caperton v. A.T. Massey Coal Co., 

 (2009). This is because “both the
appearance and reality of fairness” must be preserved so that litigants are assured that “the
arbiter is not predisposed to find against [them].” Marshall v. Jerrico, Inc., 

(1980).

          We have previously held that a petitioner claiming judicial bias must overcome the
presumptions of judicial impartiality and regularity, as well as the presumption of “‘honesty and
integrity in those serving as adjudicators’” and that “judges know the law and apply it in making
their decisions.” Coley, 

 (quoting Withrow, 

). Although Coley
recognized that “exposure to bad facts and formation of an opinion based on them are not enough
to establish bias,” this case is easily distinguishable from Coley. Id. at 750. In Coley, the judge
had previously been exposed to bad facts about the defendant outside of the record, but it was in
her official capacity as a judge, and she did not investigate the facts further, nor did she even
read the source of the bad facts. Id. at 749–51. Instead, the judge had heard about the facts
 No. 21-3404                                Davis v. Jenkins                                          Page 19


second-hand from the defense attorney, at which point she contacted the police so that they could
properly handle any investigation into the issue. Id. Thus, we concluded that it left “the trial
judge as neither investigator nor prosecutor, but simply a judge to whom the presumption of
impartiality applies.” Id. at 751.

         Here, Judge Nastoff was, in fact, acting as a prosecutor when he learned of some of the
mitigation evidence that Davis later presented at his third sentencing hearing. See R. 4-46 (2011
Postconviction Pet. Ex. D, Menashe Aff. ¶ 23) (Page ID #6279). Unlike the judge in Coley, who
was acting as a neutral arbiter, Judge Nastoff was necessarily a biased actor, because it was his
job as a prosecutor to represent the interests of the state. And Judge Nastoff did not simply
receive the information and pass it on to the relevant authorities; he actively cross-examined
witnesses on the same mitigation evidence that Davis would later present at his sentencing
hearing, where Judge Nastoff was required to weigh that same evidence as a neutral arbiter. Id.
The presumptions that we applied in Coley are therefore inapplicable to the facts in Davis’s case.

         For the above-stated reasons, this case is much closer to Williams v. Pennsylvania,2
which concluded that “there is an impermissible risk of actual bias when a judge earlier had
significant, personal involvement as a prosecutor in a critical decision regarding the defendant’s
case.”       

.    Although it is true that Judge Nastoff served as a prosecutor in
Thompson’s case and not in Davis’s case, he did have “significant, personal involvement as a
prosecutor” in the cross-examination, and therefore the undermining and discrediting of, critical
mitigation evidence that was equally applicable to Davis’s case.                        See R. 4-46 (2011
Postconviction Pet. Ex. D, Menashe Aff. ¶ 23) (Page ID #6279).

         In coming to its decision in Williams, the Court reasoned that there is “a risk that the
judge ‘would be so psychologically wedded’ to his or her previous position as a prosecutor that
the judge ‘would consciously or unconsciously avoid the appearance of having erred or changed

         2
          Although we review de novo this portion of Davis’s claim and so we are not required to confine our
discussion to clearly established federal law, we note that we do not rely on the holding of Williams to decide
Davis’s claim. The legal reasoning anchoring Williams was established by both Withrow, decided in 1975, and In re
Murchison, 

 (1955). We therefore decide Davis’s claim on the holdings of Withrow and Murchison
alone. We nevertheless include a discussion of Williams here for the sake of completeness and as an example of
how the Supreme Court applied the legal reasoning of Withrow and Murchison to a set of facts similar to those in
Davis’s case.
 No. 21-3404                           Davis v. Jenkins                                   Page 20


position.’” 

 (quoting Withrow, 

). Likewise, the Court concluded that
“the judge’s ‘own personal knowledge and impression’ of the case, acquired through his or her
role in the prosecution, may carry far more weight with the judge than the parties’ arguments to
the court.” 

 at 9–10 (quoting In re Murchison, 

 (1955)). This logic applies
with equal force to Judge Nastoff’s role as a prosecutor in cross-examining the same mitigation
evidence that Davis would later present at his sentencing hearing. There is an impermissible risk
that Judge Nastoff’s critical view of the mitigation evidence from his time as a prosecutor would
carry more weight than the arguments that Davis actually presented to the court. Similarly,
given his role in arguing that Thompson ought to receive a death sentence, there is a danger that
Judge Nastoff remained “psychologically wedded” to his position as a prosecutor and thus would
not want to give the appearance of reversing his position on the merits of the mitigation
evidence.

       For these reasons, “the probability of actual bias on the part of” Judge Nastoff “is too
high to be constitutionally tolerable,” Withrow, 

, especially in a death-penalty case.
The potential for bias on behalf of Judge Nastoff at Davis’s third sentencing hearing was
intolerably high and thus violated due process.

       2. Deficient Performance

       The remaining question is therefore whether the Ohio Court of Appeals unreasonably
applied clearly established federal law in determining that trial counsel’s decision not to seek
recusal was strategic and therefore did not constitute deficient performance. The Ohio Court of
Appeals provided little reasoning for its holding, other than the fact that trial counsel were aware
that Judge Nastoff had prosecuted Thompson and still chose not to challenge him. Davis XIII,

, at *6.

       We conclude that the Ohio Court of Appeals unreasonably applied Strickland and its
progeny in holding that trial counsel’s decision not to move for recusal was strategic. Although
trial counsel’s strategic choices are protected, they must be “reasonable” based on the “totality of
the circumstances.” Strickland, 

 (internal citations and quotation marks omitted).
In its decision, the Ohio Court of Appeals did not even identify the appropriate federal
 No. 21-3404                             Davis v. Jenkins                                   Page 21


constitutional standard for determining judicial bias, let alone apply it to the facts of Davis’s
case.   Without determining whether Judge Nastoff’s risk of bias was too high to be
constitutionally tolerable, the Ohio Court of Appeals could not properly determine whether trial
counsel’s decision was reasonably strategic or not, because the potential for bias necessarily
informs the reasonableness of trial counsel’s decision under the circumstances. Cf. Dickerson v.
Bagley, 

 (6th Cir. 2006) (“[T]he state court unreasonably applied clearly
established Supreme Court precedent when it simply assumed that counsel’s oversights were
motivated by strategy.”). The Supreme Court, moreover, has held that trial counsel must consult
with their clients regarding important decisions and overarching strategy. Strickland, 

; Florida v. Nixon, 

 (2004). Davis’s trial counsel did not do so. R. 4-46
(2011 Postconviction Pet. Ex. B, Davis Aff. ¶ 8) (Page ID #6271).

        One of our sibling circuits has likewise held that a state court unreasonably applied
Strickland in finding that trial counsel did not perform deficiently in “advis[ing] his client to
proceed before a court that was structurally deficient” as a result of the judge’s potential for bias,
which the Third Circuit concluded was “something no competent attorney would ever do.”
McKernan v. Superintendent Smithfield SCI, 

, 566–67 (3d Cir. 2017). For the same
reasons, Davis’s trial counsel performed deficiently, because no competent attorney would
reasonably choose to proceed with a capital-sentencing hearing before a court that was
constitutionally deficient. Davis is therefore entitled to relief on this claim.

E. Ineffective Assistance of Counsel for Failing Adequately to Investigate, Prepare
   for, and Present Mitigating Evidence

        1. AEDPA Deference

        Davis argues that trial counsel at his third sentencing hearing were constitutionally
ineffective for failing to reasonably investigate, prepare for, and present mitigation testimony
from Cynthia Mausser and Dr. Robert Smith. The Ohio Court of Appeals concluded that the
decision to call Mausser as well as the “decision to engage, or not engage, in a particular line of
questioning” were “presumed to be the product of sound trial strategy” and therefore did not
constitute ineffective assistance of counsel. Davis XIII, 

, at *5.
 No. 21-3404                          Davis v. Jenkins                                 Page 22


       Although Strickland established that it is “strongly presumed” that counsel performed
adequately and reasonably exercised their professional judgment in making decisions, it did not
create an irrebuttable presumption that any act with strategic implications is reasonable and
cannot constitute deficient performance. 

. The Supreme Court has confirmed
that taking the approach that the Ohio Court of Appeals took constitutes an incorrect reading of
Strickland.    See Wiggins, 

 (“Strickland does not establish that a cursory
investigation automatically justifies a tactical decision with respect to sentencing strategy.
Rather, a reviewing court must consider the reasonableness of the investigation said to support
that strategy.”). This court has also reached the same conclusion. Dickerson, 

(“[T]he state court unreasonably applied clearly established Supreme Court precedent when it
simply assumed that counsel’s oversights were motivated by strategy, instead of requiring a
complete and thorough mitigation investigation as mandated by Strickland and its progeny.”). In
concluding that it would “not question counsel’s strategic decision” regarding questioning
witnesses, the Ohio Court of Appeals unreasonably applied Strickland by imposing a far higher
presumption of reasonableness than Strickland requires, and by failing to consider the
reasonableness of the investigation and preparation that supported trial counsel’s choices, as
required by Wiggins. Davis XIII, 

, at *5. Because the entirety of the Ohio
Court of Appeals’ decision on the merits turns on this unreasonable application of Strickland and
Wiggins, we review de novo this claim, because no deference is owed to a state-court decision
premised upon an unreasonable application of clearly established federal law. See Rice, 

.

       The Supreme Court’s precedents, moreover, clearly establish that “counsel has a duty to
make reasonable investigations or to make a reasonable decision that makes particular
investigations unnecessary.” Strickland, 

. Trial counsel promised in opening
argument that Mausser would provide specific testimony, despite failing adequately to
investigate what her testimony would be, and called her to testify even after being warned by the
prosecution that Mausser would not provide the promised testimony. This court has already
concluded that it is an unreasonable application of clearly established federal law to conclude
that trial counsel did not perform deficiently in such a scenario. English v. Romanowski, 

, 728–29 (6th Cir. 2010); see also Avery, 548 F.3d at 436–37 (holding that a court of
 No. 21-3404                           Davis v. Jenkins                                   Page 23


appeals may look to its own decisions to determine whether a legal principle has been clearly
established by the Supreme Court).        In English, this court held that “it was objectively
unreasonable for English’s trial attorney to decide before trial to call [English’s then-girlfriend]
as a witness, make that promise to the jury, and then later abandon that strategy, all without
having fully investigated [his then-girlfriend] and her story prior to opening statements.”

.     This logic applies with equal force to Davis’s counsel in their failure
adequately to investigate what testimony Mausser would actually give before promising the
specifics of her testimony in opening argument.

       As noted above, the Ohio Court of Appeals failed to address the fact that Davis raised his
claim under the rubric of trial counsel’s failure to investigate and prepare for Mausser and Dr.
Smith’s testimony, R. 4-46 (2011 Postconviction Pet. ¶¶ 64–65, 76–77) (Page ID #6248, 6251),
instead characterizing it as grounded in trial counsel’s decision to call Mausser and engage in
particular lines of questioning with Mausser and Dr. Smith, Davis XIII, 

, at *5.
The Ohio Court of Appeals thus ignored the Supreme Court’s warning that, in such cases, the
“principal concern” is “not whether counsel should have presented” certain mitigation evidence,
but instead “whether the investigation supporting counsel’s decision . . . was itself reasonable.”
Wiggins, 539 U.S. at 522–23 (emphasis in original). For this reason, to the extent that Davis’s
claim is rooted in trial counsel’s failure adequately to investigate and prepare for Mausser and
Dr. Smith’s testimony, there was no state court adjudication on the merits, and we review de
novo the claim, because the deference requirements of 

(d) do not apply.

       2. Deficient Performance

       We have repeatedly held that trial counsel perform deficiently when they either present or
choose not to present witness testimony based on inadequate investigation and preparation. See
English, 602 F.3d at 728–29; Combs v. Coyle, 

 (6th Cir. 2000) (“[D]efense
counsel’s failure to have questioned [the witness] in this regard prior to trial is inexcusable.
Defense counsel should have known [the witness’s] opinion on this ultimate issue and should
have prepared accordingly.”). The Supreme Court has likewise frequently faulted trial counsel
for failing adequately to investigate mitigation evidence in preparation for their client’s
sentencing. See Wiggins, 

; Williams, 529 U.S. at 395–96.
 No. 21-3404                          Davis v. Jenkins                                 Page 24


       For the reasons stated in the foregoing section, trial counsel performed deficiently in
failing adequately to investigate and prepare for Mausser’s testimony in advance of promising
her testimony at opening argument. Our decision in English controls. 602 F.3d at 728–29.

       After Mausser’s testimony failed to establish that Davis would never be paroled, trial
counsel then failed to prepare Dr. Smith for the fact that Davis potentially being paroled would
be an issue. R. 4-46 (2011 Postconviction Pet. Ex. I, Smith Aff. ¶ 11) (Page ID #6382). Because
of this failure, Dr. Smith’s testimony focused on Davis’s state of mind in 1984 and how
individuals with borderline personality disorder can adapt to a carceral environment, R. 5-8 (3d
Sent’g Hr’g Tr. at 248–63) (Page ID #8438–53), instead of addressing how Davis has changed
and might be able to adapt well, were he to be paroled, R. 4-46 (2011 Postconviction Pet. Ex. I,
Smith Aff. ¶ 12) (Page ID #6382). This was not a reasonable exercise of professional judgment,
and it compounded trial counsel’s failure adequately to prepare for and investigate Mausser’s
testimony. It is especially unreasonable given that two prior panels had heard and rejected
similar psychological testimony and that, at Davis’s second sentencing hearing, the panel had in
fact used such testimony in determining that a death sentence was appropriate. R. 4-46 (2011
Postconviction Pet. Ex. D, Menashe Aff. ¶ 17) (Page ID #6278).               “In assessing the
reasonableness of an attorney’s investigation, however, a court must consider not only the
quantum of evidence already known to counsel, but also whether the known evidence would lead
a reasonable attorney to investigate further.” Wiggins, 

. The combination of
Mausser’s testimony and the fact that a prior sentencing panel had found that such psychological
testimony was aggravating for Davis would lead a reasonable attorney to investigate further and
prepare Dr. Smith differently for his testimony to address both the parole issue and any issues
that prior panels had found with the psychological testimony. Davis’s counsel did not do so, and
thus performed deficiently.

       3. Prejudice

       Because the Ohio Court of Appeals held that trial counsel’s performance was not
deficient, it did not address the prejudice prong of Davis’s claim, and thus we review de novo
whether Davis was prejudiced by trial counsel’s performance. See Wiggins, 

;
Williams, 

. To show prejudice, Davis must show “a reasonable probability that,
 No. 21-3404                           Davis v. Jenkins                                   Page 25


but for counsel’s unprofessional errors, the result of the proceeding would have been different.”
Strickland, 

. This probability must be “sufficient to undermine confidence in the
outcome.” 

       Davis was prejudiced by trial counsel’s deficient performance. The sentencing panel
described Mausser’s testimony as “highly speculative and unconvincing” and determined it was
“entitled no weight” as a mitigating factor. R. 4-39 (3d Sent’g Op. at 10) (Page ID #4933).
Following Davis’s second sentencing hearing, however, without Mausser’s testimony, the Ohio
Supreme Court found that the probability that Davis would never be paroled if he were not be
sentenced to death was entitled to “some weight in mitigation.” Davis IV, 

.
Mausser’s testimony therefore actively detracted from Davis’s case in mitigation. The 2009
panel’s sentencing opinion also highlighted the fact that “Dr. Smith failed to forecast
Defendant’s behavior or recommend a treatment plan, should he eventually be released from
prison,” which demonstrates that such evidence would have been beneficial to the panel in
weighing mitigation evidence. R. 4-39 (3d Sent’g Op. at 8) (Page ID #4931). The dissent argues
that because the panel gave weight to Davis’s good behavior while previously incarcerated, Dr.
Smith’s testimony did not prejudice Davis. Dissent at 33. But the panel actually decided to
attribute “little weight” to Davis’s good behavior while in prison as a mitigating factor, id. at 10
(Page ID #4933), which was likely related to the parole issue and the fact that Dr. Smith did not
testify about Davis’s ability to rejoin society were he to be paroled. Thus, Dr. Smith’s testimony
did in fact prejudice Davis.

       The dissent also fails to discuss the testimony that Dr. Smith would have provided, had
trial counsel effectively prepared him for the parole issue. Dr. Smith could have testified that
“with time, maturity, and freedom from drugs and alcohol, someone with Borderline Personality
Disorder will gain insight and develop coping skills that would enable him to adjust to living in
the outside world.” R. 4-46 (2011 Postconviction Pet. Ex. I, Smith Aff. ¶ 12) (Page ID #6382).
He also would have testified that Davis “at the present time is a different person than he was
when he was admitted to [the Ohio Department of Rehabilitation and Correction] in 1984.” Id.
Furthermore, Dr. Smith would have testified that:
 No. 21-3404                           Davis v. Jenkins                                   Page 26


       Having been in a structured setting for the past 27 years, Von has learned to
       accept external rules and expectations regarding his behavior. He has developed
       coping strategies to deal effectively with frustration, annoyance, disappointment,
       etc. He has learned to weigh the potential consequences of his decisions and
       actions.

Id. Finally, he would have “explained that the parole process itself would provide Von with
significant structure and guidelines that would assist him in successfully re-entering society.” Id.
¶ 13) (Page ID #6382). This testimony would have left the panel with a substantially different
picture of Davis than Dr. Smith’s actual testimony provided, because his testimony focused
Davis’s state of mind in 1984, and did not explain how Davis had changed in the intervening
years and why he could now be paroled without necessarily presenting a danger to the
community. It also would have strengthened the evidence of Davis’s good behavior while in
prison, because it would have established how his behavior was demonstrative of broader
changes that Davis had made that would also allow him to live successfully outside of a carceral
environment. Instead, the panel was left with the opinion that Davis would be dangerous were
he to be paroled, and that imposing a death sentence was the only way to prevent that, as a result
of Mausser’s testimony.

       The issue of whether Davis would be paroled, and if so, whether he would present a
danger to society was plainly a major factor in the panel’s decision regarding whether to impose
a death sentence. The errors that trial counsel made in investigating and preparing Mausser and
Dr Smith’s testimony are substantial enough to undermine our confidence in the outcome of the
sentencing hearing. Trial counsel’s deficient performance likely negatively impacted the weight
the panel assigned to several of Davis’s mitigating factors, and thus there is “a reasonable
probability that, but for counsel’s unprofessional errors, the result of the proceeding would have
been different.” Strickland, 

. We therefore hold that Davis is entitled to relief on
this claim.
 No. 21-3404                             Davis v. Jenkins                                 Page 27


F. Ineffective Assistance of Counsel for Failing to Properly Advise Davis about
   Waiving his Right to a Jury Trial

          1. Procedural Bar

          Davis contends that his conviction cannot stand because his original trial counsel in 1984
failed to advise him of the collateral consequences of waiving his constitutional right to a jury
trial. The warden contends that this claim is procedurally defaulted because the Ohio Court of
Appeals invoked a procedural bar instead of considering the claim on the merits, and thus review
by this court is barred because “the state judgment rests on independent and adequate state
procedural grounds.” Coleman v. Thompson, 

 (1991). The Ohio Court of
Appeals concluded that, “as this court has previously determined, Davis’ habitual challenges
regarding his jury waiver are barred by the doctrine of res judicata.” Davis XIII, 

, at *7. The Ohio Court of Appeals incorrectly applied the doctrine of res judicata to
this claim, however, because Davis’s claim relies on evidence outside the record. Because the
Ohio Court of Appeals erred in applying the res judicata rule to Davis’s claim, it is not
procedurally defaulted, and AEDPA deference also does not apply given that his claim was not
adjudicated on the merits in state court. 

(d); see also Jones v. Bradshaw, 

, 486 (6th Cir. 2022). We review de novo the merits of Davis’s claim. Jones, 46 F.4th
at 486.

          2. Ineffective Assistance of Counsel

          To the extent that Davis’s claim relies on Padilla v. Kentucky, 

 (2010), we
conclude that it must fail, because the Supreme Court has held that Padilla does not apply
retroactively to petitioners whose convictions became final before Padilla was decided. Chaidez
v. United States, 

 (2013). Because Davis challenges the performance of his
original trial counsel in 1984, and Padilla was not decided until 2010, Davis cannot benefit from
the rule of Padilla. Although we vacated Davis’s sentence in 2007, his conviction was left
undisturbed, and thus Padilla cannot apply to claims relating to his conviction alone. And even
if we determined that Davis’s 2009 resentencing—which did not become final until after
Padilla—worked to defeat the non-retroactivity of Padilla as to Davis’s conviction, the rule of
Padilla still could not help in determining whether Davis’s trial counsel performed deficiently in
 No. 21-3404                            Davis v. Jenkins                                    Page 28


1984, because the Supreme Court has held that deficient performance is judged based on the
prevailing professional norms at the time of trial. Bobby v. Van Hook, 

 (2009) (per
curiam) (“Judging counsel’s conduct in the 1980’s on the basis of these 2003 Guidelines—
without even pausing to consider whether they reflected the prevailing professional practice at
the time of the trial—was error.”). And the Supreme Court’s decision making Padilla non-
retroactive explains why, in 1984, prevailing professional norms did not require attorneys to
inform clients of the collateral consequences of waiving a constitutional right. Chaidez, 

. Because Davis has not identified any other legal authority to demonstrate that trial
counsel performed deficiently, this claim must fail. Finding no deficient performance, we need
not address the prejudice prong of Davis’s Strickland claim.

                                       III. CONCLUSION

       For the foregoing reasons, we AFFIRM the district court’s denial of relief as to Davis’s
claims that his trial counsel were constitutionally ineffective for failing to investigate and present
mitigating evidence about the circumstances of Davis’s prior conviction (claim two) and that his
trial counsel provided ineffective assistance by failing adequately to advise him of the collateral
consequences of a jury waiver (claim five). We REVERSE the district court’s denial of relief
on Davis’s claims that the state violated his constitutional rights by enforcing his 1984 jury
waiver against him at his 2009 sentencing hearing (claim one), that his trial counsel provided
ineffective assistance by failing to move to recuse Judge Nastoff for bias (claim three), and that
his trial counsel were constitutionally ineffective in failing to reasonably prepare and present
mitigation evidence at his 2009 sentencing hearing (claim four). We REMAND to the district
court with instructions to GRANT a writ of habeas corpus vacating Davis’s death sentence
unless the State of Ohio conducts a new sentencing proceeding within 180 days of remand.
 No. 21-3404                             Davis v. Jenkins                                     Page 29


                                        _________________

DISSENT

                                        _________________

        JULIA SMITH GIBBONS, Circuit Judge, dissenting. I join the majority opinion in its
affirmance of the district court’s denial of relief as to Davis’s claims that his trial counsel were
constitutionally ineffective for failing to investigate and present mitigating evidence and for
failing to adequately advise him of collateral consequences of a jury waiver. As to the majority’s
holdings on Davis’s other claims, I respectfully dissent and would affirm the district court’s
denial of Von Clark Davis’s petition for writ of habeas corpus.

                                                   I.

        In his second habeas petition, Von Clark Davis claims that Ohio breached the terms of his
jury waiver, trial counsel failed to investigate the circumstances of his prior conviction, trial
counsel failed to move to recuse a judge who either was biased or presented the impermissible
appearance of bias, trial counsel failed to reasonably prepare for and present mitigation evidence,
and trial counsel failed to properly advise him about the effects of waiving his right to a jury.
The majority concludes that Davis is entitled to relief on three of his claimed grounds for relief—
the enforcement of his 1984 jury waiver, the ineffective assistance of counsel for failing to move
to recuse a judge at his 2009 resentencing, and the ineffective assistance of counsel for failing to
prepare and present mitigation evidence at his 2009 sentencing. Maj. Op. at 35. I disagree.

                                                  II.

        The majority initially concludes that Davis’s right to a jury trial was violated in 2009
when Davis’s 1984 jury trial waiver was enforced against him, despite the death of one member
of the original three-judge panel and the retirement of the other two. In so ruling, the majority
transforms a waiver of jury trial into a waiver of jury trial only if three particular judicial officers
make the sentencing decision. While it is true that Davis’s waiver does mention the names of
three particular judges, there is no constitutional right to have a particular judge make any
decision in any legal context of which I am aware.             The law considers judges fungible.
Interpreting the waiver as the majority does would turn waivers, guilty pleas, and various
 No. 21-3404                            Davis v. Jenkins                                    Page 30


proceedings upside down. Judges die, become ill, and leave the bench all the time, without any
effect on any waivers or other decisions a defendant may have made about his or her case.

       The majority accomplishes this analytical feat by converting the judicial officer who
signed the waiver into a party to a contractual agreement with Davis. That is never the judicial
role. Judges do not strike bargains with criminal defendants. I would deny relief on this claim.

                                                 III.

       I would similarly reject Davis’s argument that his counsel was ineffective for failing to
move for the recusal of a judge, Judge Nastoff, at his resentencing. The Ohio Court of Appeals
held that Davis’s counsel was not ineffective because the decision not to seek recusal was a
reasonable trial strategy. State v. Davis, No. CA2012-12-258, 

, at *6 (Ohio
Ct. App. Sept. 9, 2013).

       For an ineffective assistance claim, a petitioner typically must show “that counsel’s
performance was deficient” and “that the deficient performance prejudiced the defense.”
Strickland v. Washington, 

 (1984). But Strickland prejudice not need be
proven if a petitioner establishes judicial bias because “judicial bias is a structural defect.” Coley
v. Bagley, 

 (6th Cir. 2013) (citation omitted). Thus, we consider whether the
potential for bias violated Davis’s due process rights, and, if so, whether the Ohio Court of
Appeals unreasonably applied federal law in determining that trial counsel’s decision not to seek
recusal was strategic. See Kimmelman v. Morrison, 

 (1986).

       The majority concludes that “the probability of actual bias on the part of’ Judge Nastoff
‘is too high to be constitutionally tolerable.’” Maj. Op. at 24 (quoting Winthrow v. Larkin, 

 (1975)). It reasons that because Judge Nastoff served as a prosecutor in a case
against Davis’s nephew and “actively cross-examined witnesses on the same mitigation evidence
that Davis would later present at his sentencing hearing,” counsel’s failure to move for his
recusal entitled Davis to habeas relief. 

 at 22–23.

       Davis’s claim fails on AEDPA review, however, because it is not clearly established
federal law that a judge’s prior involvement in the prosecution of a defendant’s family member
 No. 21-3404                           Davis v. Jenkins                                   Page 31


creates “an impermissible risk of actual bias” in the defendant’s case. Williams v. Pennsylvania,

 (2016). Williams, the primary case that Davis cites, involved a judge’s prior
participation as a prosecutor in the same defendant’s case. 

. But participation in a family
member’s case is different than involvement in a defendant’s own case. Thus, Williams did not
clearly establish Judge Nastoff’s involvement in Davis’s case as a constitutional violation.

       The majority opinion grounds its analysis in Larkin and In re Murchison, 

(1955). See Maj. Op. at 23 n.3. But In re Murchison involved a state law that empowered a
judge to sit as a “one man grand jury” and charge crimes, which violated due process because the
judge had in effect become part of the prosecution in that same case. 

. And
while the majority cites Withrow for its general statements about judicial bias, the facts of
Withrow contradict its position. Indeed, Withrow rejected a judicial prejudice argument where
the adjudicator had previously conducted investigative functions, finding that adjudicators “are
assumed to be men of conscience and intellectual discipline, capable of judging a particular
controversy fairly on the basis of its own circumstances.” 421 U.S. at 46–55 (quoting United
States v. Morgan, 

 (1941)).

       In an attempt to connect Davis’s case to those in which a judge previously acted as a
prosecutor against the same defendant, the majority asserts that Judge Nastoff was exposed to
some of the same mitigation evidence in Davis’s trial and the trial of Davis’s nephew, Lahray
Thompson. Maj. Op. at 23–24. This argument is unpersuasive. First, Davis never clarifies what
mitigation evidence appeared at both his and Thompson’s trials, leaving us to guess the content
and extent of such evidence. Davis does point to the testimony of his sister, Carol Smith,
Thompson’s mother, and argues that “[g]iven Judge Nastoff’s prior attempt to seek the execution
of Smith’s son, he was predisposed to reject her testimony for Davis.” CA6 R. 20, Appellant
Br., at 55. But Smith never testified at Thompson’s trial, and it is not clear why Judge Nastoff
would disregard Smith’s testimony simply because he previously prosecuted her son.

       Accordingly, I would hold that Davis is not entitled to relief on this claim.
 No. 21-3404                          Davis v. Jenkins                                   Page 32


                                               IV.

       Finally, in my view, Davis’s claim that his trial counsel was ineffective for failing to
prepare and present mitigation evidence also fails.      Davis contends that trial counsel was
ineffective for presenting testimony by Cynthia Mausser, a member of the Ohio Parole Board,
and for failing to prepare or revise testimony by Robert Smith, Ph.D., a clinical psychologist, in
view of Mausser’s testimony.

       First, Davis argues that trial counsel—attempting to avoid a death sentence—incorrectly
told the three-judge panel that Mausser would testify that Davis would never be paroled. During
direct testimony, Mausser hypothesized that an individual with a criminal history comparable to
Davis’s “would likely spend a large portion of the remainder of their life in prison” and was
“unlikely” to be granted parole at a first hearing. DE 5-7, Mitigation Hr’g Tr., Page ID 8365.
On cross-examination, Mausser admitted that she could not say with certainty how she or other
parole board members would vote should Davis gain parole eligibility.

       In light of Mausser’s testimony, Davis argues that trial counsel was further ineffective for
failing to prepare Smith “for the fact that the possibility of parole was going to be a critical
issue” or to testify about “how Davis had changed over time and how, even with borderline
personality disorder, he could adapt in society if paroled,” and “failed to consider that this
psychological evidence was rejected in two previous sentencing hearings involving Davis.” CA6
R. 20, Appellant Br., at 71–72. Smith testified that Davis, who was diagnosed with borderline
personality disorder, responds well to a structured setting like prison and had shown progress
within that setting. Davis’s position is that, in the context of Mausser’s testimony regarding the
possibility of parole, Smith’s testimony implied that Davis would pose a danger to society once
outside prison’s structured environment.

       Davis’s claim fails on the prejudice prong.       The trial court “found that Mausser’s
testimony was ‘entitled to no weight’ because it was ‘highly speculative and unconvincing.’”
State v. Davis, 

 (Ohio 2014).           Similarly, the Ohio Supreme Court
“afford[ed] no weight” to Mausser’s “speculative” testimony.         

   Despite this, the Ohio
Supreme Court concluded that Davis was unlikely ever to be released from prison given his age.
 No. 21-3404                            Davis v. Jenkins                                   Page 33


Thus, the court came to the conclusion that Davis sought—that his parole was unlikely—even if
Mausser’s testimony did not accomplish that objective.

       Smith’s testimony also did not prejudice Davis. Despite Mausser’s ineffective testimony,
the court believed that Davis would likely spend the rest of his life in prison. Smith testified that
Davis suffered from alcohol dependence and borderline personality disorder and that Davis
benefitted from the prison environment due to its structure and lack of access to alcohol. Thus,
Smith’s testimony supported Davis’s argument that he would continue the good behavior that he
had exhibited while imprisoned, and the court gave weight to Davis’s “record of good behavior
in prison, both during his earlier incarceration and on death row.” Davis, 

.
Smith’s testimony therefore did not undermine counsel’s strategy of showing that Davis would
likely remain in prison and exhibit good behavior during that incarceration.

       Because Davis cannot show prejudice, I would deny relief on this claim.

                                                 V.

       For these reasons, I would not grant Davis habeas relief. I respectfully dissent.