United States Court of Appeals
                       For the First Circuit


No. 24-1351


   IAN MILLER, personal representative of the Estate of Robert
                          Joseph Miller,

                        Plaintiff, Appellee,

                                 v.

 SPENCER JACKSON, in his individual capacity; SEAN ROYCROFT, in
                    his individual capacity,

                      Defendants, Appellants.


          APPEAL FROM THE UNITED STATES DISTRICT COURT
               FOR THE DISTRICT OF MASSACHUSETTS

              [Hon. Angel Kelley, U.S. District Judge]


                               Before

                       Barron, Chief Judge,
              Thompson and Rikelman, Circuit Judges.



     Alexandra M. Gill, with whom Douglas I. Louison and Louison,
Costello, Condon & Pfaff, LLP, were on brief, for appellants.
     Matthew W.H. Wessler, with whom Robert Friedman, Gupta
Wessler LLP, Howard Friedman, Law Offices of Howard Friedman, PC,
Jeffrey Wiesner, Jennifer McKinnon, and Wiesner McKinnon LLP, were
on brief, for appellee.
September 10, 2025
            THOMPSON, Circuit Judge.

                                  OVERVIEW

            Robert   Miller    died    during   a    run-in   with   Barnstable

police officers Sean Roycroft and Spencer Jackson at his Cape Cod

home in 2019.    He was 63.      A big question is how this happened.

The parties (whose names appear in our caption) give differing

accounts.    But at this stage, we (as will be seen) must credit

Miller's representative's version if there's evidence to support

it.   And that's the version we set out here and throughout.

            The tragedy impelling this litigation unfolded in just

minutes.    Responding to a 911 call from Miller's girlfriend that

he "need[ed] a psych evaluation," Roycroft got to Miller's place

at 7:09 p.m. (she made the call around 7:03 p.m. and reported no

crime (to be clear)).         Jackson got there about a minute later.

And by 7:12 p.m. — after struggling to handcuff him while on the

floor of the home's office area — the officers needed an ambulance

for the now-lifeless Miller, who was pronounced dead at 8:00 p.m.

            Miller's son (whom we'll just call "plaintiff") sued the

officers on behalf of the estate, alleging a federal excessive-

force claim.     See 

.              Following discovery, the

officers moved for summary judgment on qualified-immunity grounds.

Qualified immunity (broadly speaking) protects them from this suit

unless they violated clearly established constitutional norms.

See, e.g., Plumhoff v. Rickard, 

 (2014).               But the


                                      - 3 -
district judge (roughly speaking) thought that plaintiff raised

triable issues because of questions concerning what reasonable

jurors could infer about the officers' conduct (described more

fully below) after "Roycroft and Miller tripped and fell to the

floor in the office space area."          See Est. of Miller v. Roycroft,

No. 21-CV-10738-AK, 

, at *12 (D. Mass. Mar. 31,

2024).    So the judge denied summary judgment on that aspect of the

case.    See 

.      The officers appealed.

            After careful consideration of this interlocutory matter

("interlocutory," because the suit remains live in the district

court), we reverse in part, affirm in part, and dismiss in part —

sharing only those details needed to justify our decision (anyone

interested in the full background can consult the district judge's

opinion   (cited   in   the   preceding     paragraph)).   See   generally

McKenney v. Mangino, 

 (1st Cir. 2017) (signaling

that a "pretrial denial of qualified immunity is but a way station

in the travel of a case," and adding that "[d]epending on the facts

proven at trial and the inferences drawn by the jury, the defendant

may or may not ultimately prevail on his qualified immunity

defense" (quotation marks omitted)).




                                    - 4 -
                               GUIDING PRINCIPLES

            A little bit about the legal backdrop is helpful, as a

sort of primer for what's to come.

            Qualified immunity shields police officers from § 1983

suits unless the officers violated clearly established federal law

apparent to a rational officer standing in their shoes when they

acted.     See, e.g., Pearson v. Callahan, 

(2009)    (holding     that    the   qualified-immunity      defense    turns   on

whether    (1)   the    officers       violated   constitutional       guarantees

(2) that governing caselaw clearly established the violation when

it occurred — adding also that courts can resolve the defense under

the first or second prong, as there's no "rigid order of battle").

See generally Dist. of Columbia v. Wesby, 

, 63-64 (2018)

(remarking that while in the "rare" case a clearly established

right may be "obvious," clearly establishing a right typically

requires     "'controlling'"         caselaw      or     a   "'consensus'"      of

"'persuasive'"       caselaw    that    puts    the    constitutional    question

"'beyond debate"" (quoting Ashcroft v. al-Kidd, 

, 741-

42 (2011))); McKenney, 

 (discussing the qualified-

immunity standard in exquisite detail).               Summary judgment in these

kinds of cases turns on whether the record — read most favorably

to plaintiff, with every reasonable inference it permits — reveals

a material-fact dispute barring the officers' qualified-immunity

claim or shows their right to judgment as a matter of law.                   See,


                                        - 5 -
e.g., Rivera-Corraliza v. Puig-Morales, 

 (1st

Cir.   2015)    (stressing     that    "[c]ourts       penalize    officers       for

violating      'bright     lines,'     not     for     making      'bad     guesses

in gray areas'" (quoting Maciariello v. Sumner, 

(4th Cir. 1992))).

            Orders       denying     summary     judgment        usually     aren't

immediately appealable.            See, e.g., Johnson v. Jones, 

 (1995) (discussing 

).                 And that's because

they're not final orders in the traditional sense. See 

 (noting

that § 1291 "grants appellate courts jurisdiction to hear appeals

only from 'final decisions' of the district courts"). An exception

exists for a summary-judgment order denying a qualified-immunity

request if the appeal is about legal issues. Id. at 317. Qualified

immunity, you see, is a defense from suit — not just liability.

Id. at 312.     And forcing officers who lost on summary judgment to

wait for a jury verdict before appealing would kibosh an essential

piece of the defense.       Id.     But — an important but — while we have

jurisdiction     to   resolve       purely     legal    issues,     we     have    no

jurisdiction to resolve fact disputes.               See id.    Put most simply,

"the interlocutory appeal to vindicate the right not to be tried

is unavailable when there is no legal uncertainty; there is no

separate 'right not to be tried' on the question whether the

defendants did the deeds alleged; that is precisely the question

for trial."      Elliott v. Thompson, 

 (7th Cir.


                                      - 6 -
1991).   See generally Brown v. Dickey, 

 (1st Cir.

2024) (stressing that we lack jurisdiction if the officers' appeal

turns on their "claim that 'the facts asserted by the plaintiff[]

are untrue, unproven, warrant a different spin, tell only a small

part of the story, [or] are presented out of context'" (quoting

McKenney, 

)).1

                           WHAT HAPPENED

                            Key Facts2

          We now return to the scene of Roycroft and Miller lying

on the office floor (which led to the conduct that the judge ruled

not covered by qualified immunity) — viewing (as required) the

evidence and all inferences from it in the light most sympathetic

to plaintiff.   See, e.g., Rivera-Corraliza, 

.3

          The men's face-down tumble — occurring as Roycroft had

his arms wrapped around Miller's chest from behind — resulted in

both of Miller's arms and Roycroft's left arm getting pinned under



     1 We confess that separating law-based appeals from fact-
based appeals isn't always easy. See Morse v. Cloutier, 

 (1st Cir. 2017).
     2 Although this should be obvious, we point out that the
"facts" in this opinion may not be the "actual facts" decided at
trial — they're just the facts for summary-judgment purposes. See
Eldridge v. Gordon Bros. Grp., L.L.C., 

 (1st Cir.
2017).
     3 The officers specifically state that "the sole use of force
on which this appeal is focused" concerns the "segment of force"
for "the events that occurred after Miller and Roycroft fell down
to the floor in the office area."


                               - 7 -
Miller's body. The 6'0" Roycroft — with his (estimated) 220 pounds

of body weight and gear — had basically dropped on top of Miller,

who (in turn) had landed on a golf club.      Finding himself sort of

"on [Miller's] left side," Roycroft had his right leg over Miller's

left leg and his right arm between Miller's shoulder blades.

Miller tried to "lift his chest" up.        But Roycroft pushed down

with his right arm to stop Miller "from creating that space"

between Miller's chest and the floor.      Delivering a half-strength

body punch to Miller's right side, Jackson hoped to "distract[]"

him so he could pull Miller's "hands from underneath [Miller's]

body" and cuff him.   But no such luck.    So Jackson — after radioing

for backup at 7:11:52 p.m. — punched Miller again.

          And that second hit changed everything, as shown by what

happened over the next minute or so.      Roycroft freed his left arm.

Jackson yanked Miller's right hand behind Miller's back and cuffed

Miller's right wrist.    Roycroft grabbed Miller's left hand "[a]t

the same time."   Miller's girlfriend — Amy Anderson — saw one of

the officers drive a knee into Miller's back to gain leverage.

She also heard Miller say, "I can't breathe" and "Amy, help me"

(she said Miller said these things when the officers "were trying

to put handcuffs on him," a point the officers don't dispute).

Jackson ultimately got the cuffs on Miller's left wrist as well

and "double-locked" them behind Miller's back.           And Roycroft

"immediately reached down" to get Miller to his feet but could


                               - 8 -
not.    Roycroft then rolled Miller (whose pupils were fixed) onto

his side (so Miller "wouldn't be face down"), saw he wasn't

breathing and had no pulse, called for medical help at 7:12:58

p.m.,    and     started        CPR   (an     initialism       for   cardiopulmonary

resuscitation,      an   emergency          procedure   used    during   cardiac   or

respiratory arrest).

           An ambulance took Miller to a local hospital, where the

staff declared him dead.              The medical examiner listed Miller's

cause of death as "cardiac dysrhythmia in the setting of excited

delirium [due to] unknown psychiatric illness at the time of the

restraint."      But plaintiff's medical expert concluded that Miller

died of a "prone restraint cardiac arrest" caused by the pressure

Roycroft       applied     to     Miller's     back     that     impaired   Miller's

breathing.

           For perspective's sake, we think it makes sense to divide

the crucial facts into two phases (the phases' significance will

become clear shortly):




                                        - 9 -
                               Timeline
~7:10 p.m.                 7:11:52 p.m.                 7:12:58 p.m.
                                                     (Roycroft calls
(Men fall to floor)      (Jackson's second                ambulance)
                              punch)
           Phase One:                           Phase Two:
    Roycroft's arm is pinned              Roycroft's arm is free;
                                           officers cuff Miller
   Nature of Excessive Force:         Nature of Excessive Force:
  • Half of Roycroft's weight        • Knee on Miller's back
     on Miller
  • Forearm pressing down as
     Miller presses up


                         Key Rulings Below

          This brings us to the judge's summary-judgment order

denying qualified immunity to Roycroft and Jackson.

                      Constitutional Violation

          The judge first looked to see if plaintiff had shown

that the officers' used constitutionally excessive force.     Est. of

Miller, 

, at *8.4     And applying factors that help

determine whether an officer acted reasonably — the severity of

the victim's crime (if any); the type of threat (if any) he posed

to the officers or others; and his active resistance (or not) —

the judge concluded (after reading the record in the right light)




     4 To clarify a possible point of confusion, plaintiff claims
that Roycroft and Jackson applied excessive force themselves and
that Jackson also failed to stop Roycroft's excessive force.


                               - 10 -
that plaintiff had shown exactly that.     

 (discussing

Graham v. Connor, 

 (1989)).

          Miller had committed no crime, the judge noted.     Id. at

*9.   And "[a]lthough Roycroft's left arm being trapped underneath

Miller may have been cause for concern," the judge saw no facts

suggesting that "Roycroft was in danger."      Id. at *11.   Miller

never had "a weapon," the judge added, and "[h]e never threatened

[the officers] or Anderson, and he never struck anyone."         Id.

What's more, the judge found insufficient "facts" to "infer [that]

Miller . . . deliberately trapp[ed] Roycroft's arm underneath his

body." Id. Pointing to plaintiff's expert's deposition, the judge

then found that the record raised "the inference that Miller

struggled to cast Roycroft's weight from his back so he could

breathe" — meaning "a genuine issue of material fact" existed "as

to whether Miller actively resisted at all."    Id.   Based on their

training and experience, the judge continued, Roycroft and Jackson

knew about the "risk of restraint-related asphyxiation in this

circumstance."   Id.5   So, the judge wrote, "a jury could find that


      5Among the significant evidence the judge cited was a
"guidance" document "circulated" by the federal government that
"warn[ed] of the risk of positional asphyxia resulting from the
use of a prone restraint." Id. The record also shows — as the
judge inferred — that Roycroft and Jackson knew that police
officers should help persons having trouble breathing; that
Roycroft knew that he could "reduce or eliminate" breathing
problems for in-custody persons lying on their stomachs by getting
them off their stomachs; that Jackson knew that factors like age,
obesity, and physical condition could make it harder for persons


                                - 11 -
an objectively reasonable officer" in their position "would have

concluded that Miller was struggling to breathe, not resisting

arrest."   Id.

           And having explained how the Graham factors shook out,

the judge ruled that "a jury could reasonably conclude that there

was little or no need for the application of force against Miller,

and that in light of his death, the force was excessive."                Id. at

*12.

                           Clearly Established

           The judge then shifted to whether plaintiff had shown

that the law was so clearly established that sensible officers

would've known that they were breaking it.              Id. at *12-14.      And

the judge concluded (after still approaching the record from the

requisite plaintiff-friendly vantage) that plaintiff had done

precisely that.    Id.

                                  Roycroft

           Starting off, the judge found that a "reasonable jury

could   infer"   that    once   the   men   fell   to   the   floor,   Roycroft

"appl[ied] pressure on Miller's back" — first with "his right arm"

and then with "his knee," while Miller "was restrained."                Id. at


to breathe if they were left lying on their stomachs (the then-
63-year-old Miller was 5'9", 214 pounds when this went down); that
Jackson also knew that a person having difficulty breathing might
"struggle," so as to get air into the lungs; and that Jackson knew
too that officers should ease the pressure on a face-down person's
back during a handcuffing.


                                      - 12 -
*12 (emphasis added).         And as Miller struggled to push up for

deeper breathes, the judge mentioned, Roycroft pushed down to stop

him.   Id.    Quoting McCue v. City of Bangor, 

 (1st Cir.

2016), the judge next found it clearly established by "2012" —

years before this incident — "that exerting significant, continued

force on a person's back while that person is in a face-down prone

position after being subdued and/or incapacitated constitutes

excessive force."       See Est. of Miller, 

, at *13

(quoting McCue, 

).       From there, the judge noted that

Abdullahi v. City of Madison, 

 (7th Cir. 2005) — a

case that helped form McCue's rule — held that an officer couldn't

get

             qualified immunity at summary judgment where
             [he] "placed his right knee and shin on the
             back of [plaintiff's] shoulder area and
             applied his weight to keep [the detainee] from
             squirming or flailing" for 30 to 45 seconds,
             despite the fact that the detainee had
             "arch[ed] his back upwards as if he were
             trying to escape" in "a futile attempt to
             breathe."

Est.   of    Miller,   

,   at   *13   (first   and   third

alterations added by us) (quoting Abdullahi, 

).

Which led the judge to "find[]" it clearly established when Miller

died that he "had a constitutional right to be free from an officer

kneeling on his back after he had been restrained."           

             Continuing, the judge also found a fact dispute on

"whether either [officer] placed [a] knee on Miller's back,"


                                    - 13 -
"whether they exerted any weight on Miller's back," and "whether

Miller said he could not breathe or made a plea for Anderson's

help."    

   But the judge emphasized that she had to resolve all

disputed facts and draw all inferences in plaintiff's favor.     

Having done all that, the judge ruled that Roycroft had fair notice

"that subduing an unarmed and mentally unstable individual with

compressive body weight who stated he could not breathe would

violate that person's clearly established right to be free from

excessive force" — and that a reasonable officer in his position

would've known that.     See 

 (emphasis added).

            So the judge held that Roycroft wasn't "entitled to"

qualified immunity on summary judgment.     See 

            Now might be a good time to make explicit what a reader

may've already noticed — namely, that the judge's reasoning for

denying Roycroft qualified immunity focused on Phase Two of the

struggle, where Roycroft freed his arm and the officers cuffed

Miller (we introduced the phases in the chart above6).     Remember,




     6   For convenience, we reproduce the chart here:




                                - 14 -
after surveying McCue and Abdullahi, the judge ruled that Miller

had a clearly established right not to have an officer "kneeling

on his back" once "he had been restrained."         See Est. of Miller,

, at *13 (emphasis added). And because the kneeling

occurred only after Roycroft freed his arm, the judge's ruling

must relate to Phase Two.

                                 Jackson

           Citing Davis v. Rennie, 

 (1st Cir. 2001), the

judge also considered it clearly established that officers like

Jackson must intervene in another's excessive force when they see

it and can reasonably stop it.       Est. of Miller, 

,

at *13 (discussing Davis, 

).        Given the scanty info




                                 Timeline

~7:10 p.m.                  7:11:52 p.m.                   7:12:58 p.m.
(Men fall to floor)      (Jackson's second              (Roycroft calls
                              punch)                         ambulance)

             Phase One:                           Phase Two:
      Roycroft's arm is pinned              Roycroft's arm is free;
                                             officers cuff Miller

Nature Excessive of Force:           Nature of Excessive Force:

  •   Half of Roycroft's weight        •    Knee on Miller's back
      on Miller
  •   Forearm pressing down as
      Miller presses up




                                 - 15 -
Jackson had when he first saw Roycroft and Miller, the judge ruled

that "an objectively reasonable police officer" in his position

would've    thought      "Miller    might   be   dangerous      and   [would've]

prioritized helping Roycroft" — thus making it "reasonable for

Jackson    to   then    punch    Miller's   torso   in   an    attempt   to   free

Roycroft's left arm."        Id. at *14.      But the judge found many fact

disputes    about      "events   immediately     after   that   the    jury   must

decide," including "how long Miller was on the floor" — plaintiff's

expert estimated that "Roycroft applied pressure on Miller's back

while attempting to handcuff him for approximately two minutes and

fifteen or thirty seconds" (which meant Jackson had about "the

same amount of time to determine whether his and Roycroft's use of

force was excessive and that they needed to stop"); whether the

officers "put his knee on [Miller's] back and if so, for how long"

(Anderson saw one of the officers do it, but Roycroft doesn't

remember doing it or seeing Jackson do it — though he concedes

that either he or Jackson may have done it for a "few seconds");

and whether Jackson knew Miller was "struggling to breathe."                   Id.

at *14 & n.2.     "Jackson would be entitled to qualified immunity if

his version of events is substantiated," the judge wrote, but not

"if the fact finder believes [plaintiff's] version."                  Id. at *15.

            So the judge held that she'd "wait until after the facts

have been settled to determine whether" Jackson acted objectively

reasonably for qualified-immunity purposes.              Id.


                                     - 16 -
          Roycroft   and    Jackson   then   filed   this   interlocutory

appeal.

                           OUR CONSIDERED TAKE

                               Reminders

          Time to roll up our sleeves and decide how the case

should come out.     Keep a couple things in mind as we do (they

should sound familiar).       For one, to defeat qualified immunity

plaintiff must not only prove a violation of a federal right, but

of a   clearly established     federal right.        See, e.g.,   Rivera-

Corraliza, 

.     For another, we can only resolve the

officers' legal challenges — not challenges that "turn[] on either

an issue of fact or an issue perceived by the [district judge] to

be an issue of fact."      See Morse, 

 (emphases added)

(quoting Stella v. Kelley, 

 (1st Cir. 2017)); see

also Cady v. Walsh, 

 (1st Cir. 2014) (holding

that if "the defendants fail to pose . . . the qualified immunity

question in a manner that would permit us to conclude that 'the

answer to it does not depend upon whose account of the facts is

correct,'" then "we lack the authority to provide an answer"

(quoting Stella, 

)).

                        Arguments and Analysis

                                 Setup

          Insisting that Roycroft's arm was stuck under Miller

"until just before Miller was handcuffed," the officers' big-


                                 - 17 -
picture argument — spanning Phases One and Two — is that no clearly

established rule forbade the use of force that "occurred" before

Miller     was    "restrained"    through      "handcuff[s]"     (because     the

officers contest only the clearly established component of the

qualified-immunity        analysis,    that's    all    we    address   (fyi)).

Roycroft and Jackson cuffed Miller close to the end of Phase Two.

Which is why we read their argument as straddling both phases (and

which is why we split the discussion that follows into "Phase One

Conduct" and "Phase Two Conduct").             Anyway, as framed this claim

(centered on their doubts about legal doctrine) is a "purely legal"

one over which "[w]e have jurisdiction" (despite what plaintiff

believes) — though to the extent they also contest plaintiff's

account of the facts along the way, we won't resolve them because

we're powerless to do so.          See, e.g., McKenney, 

.

See generally In re Lac-Mégantic Train Derailment Litig., 

,   77   (1st    Cir.   2021)   (remarking     that   "in   the   absence    of

jurisdiction, a federal court is 'powerless to act'" (quoting Am.

Fiber & Finishing, Inc. v. Tyco Healthcare Grp., 

(1st Cir. 2004))).

                             Phase One Conduct

            First up, the Phase One conduct — involving (as our chart

in footnote 6 notes) Roycroft pressing Miller's chest to the ground

with his right arm as Miller "push[ed] up," while his "left arm




                                      - 18 -
[was] trapped underneath Miller."              See Est. of Miller, 

, at *12.

                                    Roycroft

            The   rule    "don't    use   excessive    force!"   is    clearly

established.      See McKenney, 

 (citing Graham, for

example).   But that doesn't clue officers in on what kinds of force

are excessive and in which situations.             See 

    Only when pre-

existing precedent — "controlling" authority or a "consensus of

persuasive"    authority     —     involving    "similar"    facts    puts   the

illegality of a specific action "beyond debate" may damages be

awarded (points mentioned above).              See Berge v. Sch. Comm. of

Gloucester, 

 (1st Cir. 2024) (quoting Wesby, 583

U.S. at 63).7     The legal rules that plaintiff relies on must've

been so clearly established that reasonable officers would've

known that they were doing wrong.             See, e.g., Wesby, 583 U.S. at

63.

            Plaintiff notes (as the judge did) that the officers

acted after McCue held "that exerting significant, continued force

on a person's back while that [person] is in a face-down prone

position after being subdued and/or incapacitated constitutes

excessive force."        See 

 (quotation marks omitted).


      7No one argues that this is the rare obvious case where the
violation is so clear that no similar case is needed. See id.;
see also Wesby, 583 U.S. at 64.    So we say no more about that
subject.


                                     - 19 -
And plaintiff adds (as the judge also did) that McCue's embrace of

Abdullahi confirms that this rule applies where the plaintiff-

pleasing version of the facts showed a person's "attempts to

'squirm' or arch his back upward while he was being restrained"

wasn't "resistance" but instead was "a futile attempt to breathe."

See Abdullahi, 

.

            But unfortunately for plaintiff, we can distinguish both

cases   when   it   comes   to   the    Phase   One   conduct   (even   without

considering the officers' handcuffed-based argument here (we'll

deal with that in the "Phase Two Conduct" section below)).              Simply

put, no officer in either case was trapped (or "immobilized," to

use the officers' word) in the way Roycroft was.                  And while a

plaintiff needn't cite a case "directly on point" to put the

"constitutional question beyond debate," see Ashcroft, 563 U.S. at

741, McCue and Abdullahi are too far from "on point" to tip "every

reasonable" officer off that the Phase One conduct would cross

legal lines, see Wesby, 583 U.S. at 63; see also Brosseau v.

Haugen, 

 (2004) (emphasizing that a right is

"clearly established" when it's not among the "'hazy'" area of

constitutional rules that officers at the scene might "reasonably

misapprehend[e]d" (quoting Saucier v. Katz, 

, 206

(2001))).




                                       - 20 -
                              Jackson

           Not much needs to be said about Jackson here.    Because

Roycroft's Phase One conduct didn't violate clearly established

law, Jackson had no duty to intervene there.      See, e.g., Davis,

 (discussing when the duty to intervene arises).8

                            Conclusion

           We must reverse that part of the judge's order denying

summary judgment on qualified-immunity grounds for the Phase One

conduct.

                         Phase Two Conduct

           Next up, the Phase Two conduct — involving (as our chart

in footnote 6 also notes) an officer "kneeling on" Miller's "back"

after Roycroft had freed his arm.       See Est. of Miller, 

, at *13.

                             Roycroft

           The officers argue that the judge stumbled in locating

clearly established law in McCue.       But their contentions don't

work.




     8 Plaintiff insists that "Jackson never addressed the duty to
intervene below" and so waived any objection he might've had to
qualified immunity on that claim. But we fall back on the baseline
rule that "[a]ppellate courts may . . . address an issue not
presented to the lower court if the lower court nevertheless
addressed the issue."    Holsum de P.R., Inc. v. ITW Food Equip.
Grp. LLC, 

 (1st Cir. 2024).


                              - 21 -
           A few words about McCue.        Trying to take Phillip McCue

into protective custody (he might've been high on bath salts), the

McCue officers tased him, handcuffed him behind his back, laid him

face down, and applied significant weight on his shoulders and

neck for up to five minutes when he wasn't resisting.           

.      Which led to McCue's holding (after perusing

relevant precedent) that pre-existing law clearly established

"that exerting significant, continued force on a person's back

while that [person] is in a face-down prone position after being

subdued and/or incapacitated constitutes excessive force," see 

 (quotation marks omitted and emphases added) — the italicized

lingo play a starring role in the arguments that follow.

           Anyhow, and importantly here,         McCue found      Abdullahi

especially    helpful   in   defining   the   contours   of   that   clearly

established law.        See McCue, 

.            The Abdullahi

officers wrestled Jamal Mohamed (a PTSD sufferer) to the ground

(after he had behaved menacingly).       

 (indicating

that PTSD is short for "Post Traumatic Stress Disorder").            Mohamed

then started "kicking his legs, moving his arms so they could not

be handcuffed and arching his back upwards as if he were trying to

escape."     

.     And "for 30 to 45 seconds," one of the

officers — as McCue noted, recapping Abdullahi — put "'his right

knee and shin on the back of Mohamed's shoulder area and applied

his weight to keep Mohamed from squirming or flailing.'"              McCue,


                                  - 22 -


 (quoting Abdullahi, 

).   But despite

Mohamed's thrashing around, Abdullahi — as McCue also documented

— decided "that this movement may not have constituted resistance

but rather 'a futile attempt to breathe' with the officer's weight

on his upper body."    

 (quoting Abdullahi, 

).

Which explains Abdullahi's ultimate holding that the summary-

judgment record showed a violation of Mohamed's constitutional

rights (even though a trial might present a different record).

Abdullahi, 

.

          As previewed above, plaintiff's judge relied on McCue

and McCue's embrace of Abdullahi in ruling that clearly established

law recognized plaintiff's "constitutional right to be free from

an officer kneeling on his back after he had been restrained" —

something "a reasonable officer would have been aware" of.     See

Est. of Miller, 

, at *13.    See generally Hope v.

Pelzer, 

 (2002) (indicating that an action's

unlawfulness can be apparent not only from direct holdings but

also from specific examples deemed unlawful).   The officers argue

against that ruling.    But their theories — one law-based, the

others fact-based — provide no foothold for a reversal.

                                 (i)

          The officers' legal argument is that McCue's lesson —

"that exerting significant, continued force on a person's back

while that [person] is in a face-down prone position after being


                              - 23 -
subdued   and/or      incapacitated        constitutes      excessive      force"

(emphases added) — applies only to force used on an already-

handcuffed person.      And they think this because McCue was already

cuffed when the officer used his knee as he did.                   So to them,

"subdued" or "restrained" means — as a legal matter — "handcuffed."

Accordingly, they go on, because "no knee or pressure of any kind

was placed on Miller's back at any point after the handcuffs were

applied," plaintiff's case falls outside McCue's ambit — meaning

McCue can't provide the clearly established law needed to overcome

qualified immunity for the Phase Two conduct.

           That's legally wrong.          Abdullahi — flagged by McCue as

a textbook example of unconstitutional conduct — shows as much

because an officer there (like one here) inflicted the illegal

force before the person was cuffed.               See Abdullahi, 

 (recounting that the officer "took his weight off Mohamed after

the handcuffing was complete" (emphasis added)).               And — to spell

out the obvious — McCue's reliance on Abdullahi in pinpointing the

clearly established rule makes plain that the directive extends to

persons not already cuffed, despite what the officers claim.                  See

generally Taylor v. City of Milford, 

 (7th

Cir. 2021) (disclosing that the summary-judgment record supported

a violation of clearly established law where an officer used "his

weight"   to   keep   an     uncuffed    person    "experiencing    a   diabetic

emergency"     face   down    on   a    bed     (citing   McCue,   among    other


                                       - 24 -
authority)).    So the argument as framed by them has no oomph.              See

generally United States v. Sineneng-Smith, 

 (2020)

(commenting that the party-presentation principle compels courts

to "rely on the parties to frame the issues for decision" (quoting

Greenlaw v. United States, 

 (2008))). Critically,

too, if the officers think they've made any other "Miller wasn't

subdued"-type legal arguments (the quoted phrase is our shorthand

descriptor),    we'd    find   them    "too     'skeletal'    or    'confusingly

constructed'" to be preserved.            See Págan-Lisboa v. Soc. Sec.

Admin., 

 (1st Cir. 2021) (quoting Rodríguez v. Mun.

of San Juan, 

 (1st Cir. 2011)).

                                       (ii)

          The       officers   next     make     a   series    of     fact-based

contentions     —   pitting    their    story    against     plaintiff's    (the

evidence doesn't undeniably establish a single account).                     But

unfortunately for them, we have no jurisdiction to decide whether

they get qualified immunity under a different version of the facts

(as this part of our opinion drives home).              See, e.g., Johnson,

.

          Zeroing in on McCue's "continued force" requirement, the

officers argue that the judge "incorrectly held that placing a

knee on the back of an individual 'for a few seconds' (at most) in

order to facilitate handcuffing is, per se, an excessive use of

force — and that an objectively reasonable officer in Roycroft's


                                   - 25 -
and Jackson's position would have known doing so violated Miller's

constitutional rights" (emphases added).     The officers create that

"h[o]ld[ing]" out of thin air.        True, the judge did say that

Roycroft claimed that the kneeling force (if used) could've lasted

for only a "few seconds."     Est. of Miller, 

, at *14

n.2.       But the judge explicitly found a fact "dispute" over "how

long" Roycroft (or Jackson) applied pressure.       

.   So

their claim as presented can't move the needle in their favor.

See, e.g., Sineneng-Smith, 

 (discussing the

party-presentation rule so basic to "our adversarial system").

And if the officers believe they've raised any other "no continuous

force"-type claims (our shorthand descriptor for this facet of

their argument), they waived them through inadequate briefing.

See, e.g., Págan-Lisboa, 

.

               Now looking to distance themselves from Abdullahi, the

officers say that an officer there "continued to apply force after

the [person] stopped resisting" (emphases added).     But they can't

duck the judge's express rulings that "a jury could find that an

objectively reasonable officer with [their] training would have

concluded that Miller was struggling to breathe, not resisting" as

Roycroft (or Jackson) applied pressure.      See Est. of Miller, 

, at *11-12 (emphases added).9     The officers mention in



       Faced with Anderson's account that Miller said "I can't
       9

breathe" and "Amy, help me," the officers basically challenge her


                                 - 26 -
passing that they "could have reasonably (even [if] mistakenly)"

thought Miller "[w]as offering resistance."    But by making the

suggestion without any developed rationale, they waived it.   See,

e.g., United States v. Zannino, 

 (1st Cir. 1990).10

          The officers then write that they didn't defy clearly

established law because they "knew Anderson was in a dangerous

situation due to Miller's behavior prior to the 911 call."    The

judge did say that a sound jury could infer that Miller posed a

danger to Anderson.   See Est. of Miller, 

, at *10.

But the judge also said that an astute jury could alternatively




credibility — contending that her memory was "unclear" at times.
But at summary judgment, credibility calls go to the plaintiff
(and credibility is a matter for the jury, not us). See, e.g.,
Rodríguez, 

. Relying on Hunt v. Massi, the officers
also note that "a police officer need not credit everything" a
resisting criminal suspect "tells him."    

, 369 n.6
(1st Cir. 2014) (emphasis added) (quoting Rodriguez v. Ferrell,

 (11th Cir. 2002)). But see Jennings v. Jones,

 (1st Cir. 2007) (holding that clearly established
law banned officers from "increas[ing] their use of physical force
after an arrestee who has been resisting arrest stops resisting
for several seconds and warns them that they are" exacerbating his
injuries). But the officers are stuck with the judge's finding
(so important we've quoted it more than once) that "a jury could
find that an objectively reasonable officer with [their] training
would have concluded that Miller was struggling to breathe, not
resisting." See Est. of Miller, 

, at *11 (emphases
added).   We say "stuck" because their attempt to upset how the
judge understood this part of the record is verboten. See, e.g.,
Brown, 

.
     10 The "not resisting" piece of the judge's ruling also
distinguishes this case from others they cite — like Gray v.
Cummings — where the person "resist[ed] arrest." 

(1st Cir. 2019).


                              - 27 -
draw the reasonable inference that Miller "did not appear to be

posing a danger to anyone."     See 

 (emphases added).    And then

the judge did what she's supposed to do by adopting the competing

inferences in plaintiff's favor.      See id.; see also Anderson v.

Liberty Lobby, Inc., 

 (1986).           So this fact

quarrel (like the others) "exceeds the jurisdictional limit."      See

Brown, 117 F.3d at 6.

          Somewhat relatedly, the officers protest that Roycroft's

"low-level, empty-hand force" on Miller didn't offend clearly

established law because Miller could've used a golf club or some

object in his hand as a weapon.      But the judge didn't call the

force "low-level" — probably because the evidence indicates that

once Roycroft freed his arm, he (assuming it was he, not Jackson)

applied his full weight through his knee with enough force to cut-

off Miller's air.   The judge also said that a right-thinking jury

could find it "improbabl[e] or impossible" that Miller could wield

a golf club from his stomach.   See Est. of Miller, 

,

at *11.   Plus the judge saw "no objective evidence" that Miller

had any other "object in his hand."      See 

   And the judge found

as well that a clear-eyed jury could conclude that Miller wasn't

trying to hurt "anyone."      See 

 (underscoring that

Miller "never threatened" the officers (or Anderson) and didn't

"punch, kick, or otherwise strike" them, and adding that while

Miller did "flail[] his legs" "[d]uring the altercation," the


                                - 28 -
evidence "supports the inference" that he was simply trying to

breathe).11     Because the officers' argument simply boils down to

a beef about plaintiff's side of the facts, we can't consider it.

See Brown, 

.12

                                Jackson

          The officers finally argue that Jackson had no clearly

established   duty   to   intervene,   arguing   (for   instance)   that

"[w]hile [plaintiff's use-of-force expert] might criticize Jackson

for not having been able to handcuff Miller faster, there is no

indication Jackson delayed his efforts or somehow delayed Miller's

handcuffing."    But they face an insuperable hurdle.     After listing

the components of a failure-to-intervene claim spotlighted in

Davis — i.e., a plaintiff must show that the officer (i) "'was


     11 The judge's Miller-wasn't-a-threat finding — made after
looking at the record in a plaintiff-friendly way (as her other
findings were) — differentiates this case from Justiniano v.
Walker, a case the officers' cite that involved a person who did
"pose[] a threat" from the viewpoint of a reasonable officer. 

 (1st Cir. 2021).
     12Don't misunderstand us. We know that officers on the scene
must often make "split-second" decisions to act (or not) in
situations where their choices (sometimes made with insufficient
info) could prove fatal to them and others (that's worlds apart
from what we judges do, reviewing excessive-force claims from the
confines of our chambers — protected by federal marshals and
blessed with time to reflect). See Graham, 

.
But they must accept plaintiff's report of what happened (the trial
may cast the facts in a different light, of course). See Brown,

. And they can't — as they try to do at different
junctures — question the judge's decision that "the pretrial record
sets forth a 'genuine' issue of fact for trial." See Johnson, 

.


                                - 29 -
present when excessive force was used'"; (ii) "'observed the use

of excessive force'"; (iii) "'was in a position where he . . .

could   realistically   prevent      that     force'";     and   (iv) "'had

sufficient time to do so'" — the judge found "factual disputes

regarding events immediately after" Jackson's punches "that the

jury must decide," see Est. of Miller, 

, at *13-14

(quoting Davis, 

), including:           "whether one of the

officers put his knee on [Miller's] back and if so, for how long

and how much pressure was exerted," id. at *14.              The officers'

opening brief does use Davis-like buzzwords in laying out the legal

requisites of that kind of claim.           But they don't engage there

with the facts and analysis that the judge relied on, resulting in

waiver — a problem their reply brief can't cure, either.               See,

e.g.,   Vizcarrondo-González    v.   Vilsack,    No.     20-2157,   

, at *7 (1st Cir. June 28, 2024) (citing caselaw holding

that a party commits waiver by "fail[ing] to address in its opening

brief a basis on which the district court ruled against that

party"); United States v. López, 

 (1st Cir. 2020)

(declaring it "settled beyond hope of contradiction that arguments

not made in an appellant[s'] opening brief are deemed abandoned").

                               Conclusion

           We must affirm that part of the judge's order denying

summary judgment on qualified-immunity grounds for the Phase Two

conduct.


                                - 30 -
                             FINAL WORDS

           Having intently studied the officers' arguments against

the   judge's   summary-judgment    order   denying   their   request   for

qualified immunity, we reverse the denial in part (regarding the

Phase One conduct), affirm the denial in part (regarding the Phase

Two conduct), dismiss the appeal in part (regarding the fact-based

arguments inappropriate for interlocutory appeal),             remand   for

further proceedings consistent with this opinion, and award no

appellate costs.13




      13This seems like a perfect spot to note that — in addition
to alleging a federal excessive-force claim — plaintiff also
alleged a state wrongful-death claim. Apparently proceeding on
the idea that the wrongful-death claim depended on the success of
the excessive-force claim, the judge wrote that because "there are
disputed material factual issues whether Roycroft and Jackson used
excessive force," she was denying the officers' motion for summary
judgment on the wrongful-death claim as well.     Est. of Miller,

, at *15. No one has briefed what effect a reversal
on the excessive-force claim (even in part) would have on the
wrongful-death claim. The parties and the judge can sort that out
on remand.


                                   - 31 -