A jury convicted defendant and appellant William Donald Johnson of gross vehicular manslaughter while intoxicated (Pen. Code,¹§ 191.5, subd. (a) ; count 2) and hit and run with injury (Veh. Code, § 20001, subd. (a) ; count 3). The jury also found true two enhancement allegations; defendant fled the scene (Veh. Code, § 20001, subd. (c) ; count 2) and the collision resulted in a fatality (Veh. Code, § 20001, subd. (b)(2) ; count 3). The jury did not reach a unanimous verdict on the other charged count, second degree murder (Pen. Code, § 187, subd. (a) ; count 1), and the trial court granted a mistrial with respect to that count. On retrial with respect to count 1, a new jury found defendant guilty of second degree murder.

In this appeal, defendant contends that the trial court erred during his retrial by not informing the jury that he had been convicted in the first trial of gross vehicular manslaughter while intoxicated, and that the error requires reversal of his second degree murder conviction. We agree that the trial court's instructions to the jury for defendant's retrial were erroneous in several respects, and the second degree murder conviction must be reversed.

I. FACTUAL AND PROCEDURAL BACKGROUND

On December 29, 2013, a vehicle driven by defendant veered into and across oncoming traffic lanes, striking a bicycle travelling in the opposite direction in the bicycle lane. Defendant did not slow or stop after the collision. The bicyclist died on January 11, 2014, of injuries sustained in the collision.

Defendant had recently been hospitalized for treatment for addiction to pain medication, and at the time of the collision on December 29, 2013, was driving home from follow-up outpatient therapy. He had taken several antianxiety medications, Xanax and Neurontin, as well as Cymbalta for depression. He also drank a half-pint bottle of vodka during the drive.

After the collision, another motorist saw defendant run a stop sign, nearly causing another collision, and shortly thereafter, at a stoplight, observed him to be "hunched down" in the driver's seat. Defendant's son observed that defendant appeared "out of it" and "shaken" when he arrived home on the day of the accident, and that his vehicle had suffered new damage. After the accident, a neighbor saw defendant and his family examining the front end of the car, and then covering the vehicle with a tarp or car cover. Defendant's daughter testified that defendant asked her to look for a windshield repair company located "outside the local area" to fix his broken windshield. On January 6, 2014, while the vehicle's *125windshield was being repaired, a passing law enforcement officer recognized it as matching the description of the vehicle that had struck a bicyclist; he ordered the workers to stop, and reported the vehicle to his supervisor. Responding investigators were able to match a piece of a broken headlight recovered from the scene of the collision to defendant's vehicle.

In addition to evidence of defendant's actions after the collision, the prosecution also introduced evidence of defendant's past experience with the dangers of driving while intoxicated. In 2006, defendant was injured in a single-car crash, in which he was the driver and only occupant of the car. Defendant was too severely injured to perform field sobriety tests, but a responding law enforcement officer found him to smell strongly of alcohol, and a blood test revealed his blood alcohol content to be 0.24 percent, three times the legal limit of 0.08 percent. After the 2013 collision, when asked by police why he had driven under the influence again despite the previous serious accident, defendant responded, "Yeah just horrible decisions. You know."

The prosecution also introduced evidence that from fall 2012 to fall 2013, defendant regularly attended meetings of Alcoholics Anonymous, in which the topic of driving under the influence was regularly discussed. Additionally, the parties stipulated that several medications taken by defendant came with warnings about alcohol consumption while taking the medication, operating a motor vehicle while taking the medication, or both.

Defendant presented no affirmative defense.

Defendant's first trial was conducted in August 2014. Defense counsel argued to the jury that defendant should be acquitted of second degree murder (count 1), but did not argue for acquittal with respect to the hit and run charge (count 3). With respect to gross vehicular manslaughter (count 2), counsel conceded that defendant had been negligent, but asked the jury to find him guilty of the lesser included offense of vehicular manslaughter while intoxicated with ordinary negligence (§ 191.5, subd. (b) ). The jury could not reach a verdict with respect to second degree murder, resulting in a mistrial on count 1; the jury convicted defendant of the remaining counts and their enhancements.

Plaintiff was retried on the second degree murder charge in February 2015. During voir dire for the retrial, the trial court had informed the jury panel that there had been a prior trial arising out of the same underlying facts, that defendant had been convicted of "two of the three charges brought by the district attorney," and that the jury's task would be to "address the one count that was left unresolved in the first trial."2 After the close of evidence, in response to inquiry by defense counsel, the trial court clarified that neither side would be permitted to mention the prior convictions during closing arguments. The jury was instructed on excusable homicide and on murder, but no intermediate level of culpability. Defense counsel's closing arguments adhered to the trial court's order; counsel conceded that the collision was not "just an accident," but argued that it also did not amount to murder, without mentioning defendant's *126conviction for gross negligence. The jury returned a guilty verdict.

After defendant's second trial, the trial court imposed an aggregate sentence of 18 years to life, consisting of a determinate three-year term for count 3 and a term of 15 years to life for count 1, with the sentence for count 2 and its enhancement stayed pursuant to section 654.

II. DISCUSSION

Citing to this court's opinion in People v. Batchelor (2014) 229 Cal.App.4th 1102, 178 Cal.Rptr.3d 28 (Batchelor ), defendant contends that the trial court erred by denying his request that the jury for his retrial be informed that he had been convicted in a prior trial arising out of the same underlying facts of gross vehicular manslaughter while intoxicated, instead informing the jury only that he had been convicted "of two of the three charges brought by the district attorney." We agree that the trial court's instructions to the jury were erroneous in several respects, including this one, and that these errors require reversal of the second degree murder conviction.

A. Standard of Review

"Whether or not to give any particular instruction in any particular case entails the resolution of a mixed question of law and fact that ... is however predominantly legal." (People v. Waidla (2000) 22 Cal.4th 690, 733, 94 Cal.Rptr.2d 396, 996 P.2d 46.) Claims of instructional error are therefore reviewed de novo. (People v. Manriquez (2005) 37 Cal.4th 547, 581, 584, 36 Cal.Rptr.3d 340, 123 P.3d 614.)

B. Analysis

1. Application of Batchelor .

In Batchelor, as here, the defendant was convicted of second degree murder on retrial, after a first jury had convicted him of gross vehicular manslaughter, but could not reach a verdict on the murder charge. (Batchelor, supra , 229 Cal.App.4th at pp. 1107-1108, 178 Cal.Rptr.3d 28.) The Batchelor trial court rejected a defense request that the second jury be informed of the gross vehicular manslaughter conviction resulting from the first trial. We found the trial court erred, reasoning that "[t]he circumstance that the first jury was unable to reach a verdict on the murder charge should not properly be an opportunity to retry the case in a new posture, giving the jury the false impression that, absent a conviction for murder, defendant's actions would be left unpunished." (Id. at pp. 1116-1117, 178 Cal.Rptr.3d 28.)

We predicted in Batchelor that "[t]here are likely many ways the trial court could have appropriately dispelled that false impression." (Batchelor , supra , 229 Cal.App.4th at p. 1117, 178 Cal.Rptr.3d 28.) Here, the trial court attempted to do so, by informing the jury that in a previous trial defendant had been convicted of "two of the three charges brought by the district attorney," and that the jury's task would be to "address the one count that was left unresolved in the first trial." Our task in this appeal is to determine whether the trial court succeeded in complying with the principles we articulated in Batchelor.

We find that the trial court did not succeed. It is unreasonable to expect a jury so instructed to refrain from speculation as to what the two unknown charges from the previous trial might have been.3 And on the facts of the present case, the two other charges could easily have been relatively minor offenses, not directly related *127to the death of the victim; for example, the defense did not contest that defendant had failed to stop at the scene of an injury accident; his attempt to cover up his involvement in a collision could conceivably have given rise to an obstruction of justice charge. Although the trial court's instruction excluded the possibility that defendant would suffer no criminal convictions, it left open the distinct possibility that he would, absent a conviction for murder, avoid any conviction holding him directly accountable for the death of the victim. This is only a slight variant of the same evil that our holding in Batchelor was intended to address.

In Batchelor, the problem was exacerbated by the prosecutor's effort to take advantage of the new posture of the case on retrial, suggesting that the jury must return a verdict of guilty on the murder charge, or else the defendant would not be held accountable at all for the death of the victim. (Batchelor, supra , 229 Cal.App.4th at p. 1117, 178 Cal.Rptr.3d 28.) Here, the prosecutor refrained from any such argument.

Nevertheless, the transcript of closing arguments is again an excellent illustration of how the trial court failed to mitigate the unfairness of the new posture of the case on retrial. In defendant's first trial, defense counsel conceded explicitly that defendant had been negligent, and that this negligence had resulted in the death of the victim, asking the jury to convict defendant of vehicular manslaughter, but not murder. On retrial, defendant was effectively foreclosed from making this argument. The jury was instructed on excusable homicide and murder, but no intermediate level of culpability. Defense counsel could concede that the collision was more than "just an accident," and could dispute that it rose to the level of second degree murder. But defense counsel could not ask the jury to hold defendant responsible for negligence (whether ordinary or gross), or point to the circumstance that defendant had already been held responsible for gross negligence by the first jury. The defense was thereby placed in a substantially weaker rhetorical position in the retrial. At the same time, the jury, given only vague information about defendant's prior convictions arising from the same facts, was given essentially the same all-or-nothing choice between excusable homicide and murder that we found problematic in Batchelor.

The People argue that our opinion in Batchelor was "poorly reasoned, wrongly decided, and should not be followed." Whether this position has merit is a matter that will ultimately be decided by the California Supreme Court; a petition for review has been granted on a (now formerly) published opinion issued by the Second District Court of Appeal that disagreed with Batchelor.4 (People v. Hicks (2015) 243 Cal.App.4th 343, 196 Cal.Rptr.3d 638, review granted March 23, 2016, No. S232218.) The Supreme Court's grant of review limits the issue to be briefed and argued to "whether the trial court erred when it refused to inform the jury at the retrial of a murder charge that defendant had been convicted of gross vehicular manslaughter in the first trial," and cites explicitly to Batchelor. (People v. Hicks (2016) ---Cal.5th ----, 200 Cal.Rptr.3d 7, 367 P.3d 6 (mem.).)

Pending the Supreme Court's final word on the issue, however, we are not persuaded *128that Batchelor was incorrect. The People point to authority for the proposition that the Supreme Court has "never suggested that the trial court is required to inform the jury of the history of the prior proceedings...." (See, e.g., People v. Edwards (1991) 54 Cal.3d 787, 845, 1 Cal.Rptr.2d 696, 819 P.2d 436 (Edwards ).) Viewing this language in context, however, to the extent it is relevant at all, Edwards only supports our holding in Batchelor. Edwards involved a first jury that had convicted the defendant of murder with the special circumstance of lying in wait, but had been unable to reach a verdict regarding penalty; a second jury was empaneled to make the determination of whether to impose a death verdict. (Edwards , supra , at pp. 803-804, 1 Cal.Rptr.2d 696, 819 P.2d 436.) The Supreme Court held that the trial court was not required to inform the second jury of the details of the case history; specifically, whether the first jury failed to reach a verdict regarding penalty, or whether the first jury's penalty verdict was overturned on appeal. (Id. at p. 845, 1 Cal.Rptr.2d 696, 819 P.2d 436.) The Supreme Court expressed no disagreement with the circumstance that the jury was told the defendant had previously been convicted of murder with the special circumstance of lying in wait. (Ibid. ) Neither Edwards, nor any other case cited by the People, stands for the proposition that on retrial a second jury should not be informed of the existence of the conviction returned by the first jury, or the nature of that conviction.

The People also suggest that Batchelor contradicts section 1180, which states as follows: "The granting of a new trial places the parties in the same position as if no trial had been had. All the testimony must be produced anew, and the former verdict or finding cannot be used or referred to, either in evidence or in argument, or be pleaded in bar of any conviction which might have been had under the accusatory pleading." (§ 1180.) Section 1180 has no application to Batchelor, or the present case, because in neither case was there a grant of a new trial; the second trial was not a reexamination of an issue previously decided, but a completion of unfinished business. (See § 1179 [defining "new trial" as "a re-examination of the issue in the same court, before another jury, after a verdict has been given"].) It should be noted, however, that the concept articulated in section 1180, that in a second trial arising from the same set of facts the parties should be put, as close as possible, in the same position as if no trial had been held, is entirely consonant with, and indeed is the fundamental principle underlying, our decision in Batchelor . (Batchel or, supra , 229 Cal.App.4th at pp. 1116-1117, 178 Cal.Rptr.3d 28.)

We are also unpersuaded that the Batchelor opinion is in conflict with the rule that punishment is not an appropriate consideration for the jury during the guilt phase of a trial. In the related context of the court's sua sponte duty to instruct on lesser included offenses, California precedent has recognized that forcing a jury to make an " 'unwarranted all-or-nothing choice' " between conviction of the crime charged and acquittal interferes with the jury's " 'truth-ascertainment function.' " (People v. Breverman (1998) 19 Cal.4th 142, 155, 77 Cal.Rptr.2d 870, 960 P.2d 1094.) Among other things, such an all-or-nothing choice may encourage the jury to return a verdict based on its own sense of rough justice, for example, by returning a conviction of the charged offense, despite entertaining reasonable doubt of guilt on some element of the offense, because it is unwilling to acquit a defendant it is persuaded has been guilty of wrongful conduct of a lesser degree. (See *129People v. St. Martin (1970) 1 Cal.3d 524, 533, 83 Cal.Rptr. 166, 463 P.2d 390.) It is inappropriate to allow either the state or the defendant to force the jury to make such an all-or-nothing decision, hoping that improper considerations may weigh in their favor: "Our courts are not gambling halls but forums for the discovery of truth." (Ibid. )

Of course, gross vehicular manslaughter is a lesser related offense of second degree murder, not a lesser included offense. (People v. Sanchez (2001) 24 Cal.4th 983, 991, 103 Cal.Rptr.2d 698, 16 P.3d 118, overruled on another ground in People v. Reed (2006) 38 Cal.4th 1224, 1228-1229, 45 Cal.Rptr.3d 353, 137 P.3d 184.) Nevertheless, the above principles articulated in the context of lesser included offenses are similarly applicable to facts such as those of Batchelor, and those of the case at bar. The primary task of both of defendant's juries was to determine the appropriate mens rea to attribute to defendant's actions, on largely undisputed underlying facts. Defendant's first jury had a variety of options, ranging from ordinary negligence (since defendant's counsel did not attempt to argue for a finding of no culpability) to implied malice. Defendant's second jury had to decide between implied malice and no unlawful intent, and was never provided the contextual information necessary to understand that defendant's first jury had already resolved the issue of whether defendant acted with an intermediate level of culpability, such as ordinary or gross negligence. This was an all-or-nothing choice that, in our view, as expressed here and in Ba t chelor , should have been placed in context by means of an appropriate instruction.

Put another way: In circumstances such as this case or those of Batchelor, the lack of context inadvertently encourages the jury on retrial to consider punishment. Providing the jury some information about the results of the first trial encourages the jury to set aside the issue of punishment, as it is instructed to do elsewhere, and facilitates its ability to focus on the analysis it is properly being asked to perform, namely, to determine defendant's level of culpability.

The People also suggest several "policy considerations" in support of the argument that the second jury was properly kept unaware of defendant's conviction for gross vehicular manslaughter in the first trial. First, they express concern that informing the second jury of the results of the first trial could prejudice a defendant from changing his defense in a subsequent trial. This hypothetical concern is not raised by the present case, or by Batchelor. We do not decide here, and did not decide in Batchelor, whether the jury should be informed of the results of the first trial over the defendant's objection. Here, as in Batchelor, the defendant requested that the jury be so instructed. Similarly, any concern that the defendant could be prejudiced by advising the jury that defendant was culpable or that it should determine certain facts adverse to defendant is misplaced when the defendant wants , as a tactical matter, to concede some culpability and does not dispute the adverse facts giving rise to that culpability.

We turn now to the issue of prejudice. Only if an examination of the record establishes a reasonable probability that the instructional error affected the outcome is reversal of defendant's conviction appropriate. (Cal. Const., art. VI, § 13 ; People v. Watson (1956) 46 Cal.2d 818, 836, 299 P.2d 243.)

In People v. Soojian (2010) 190 Cal.App.4th 491, 520, 118 Cal.Rptr.3d 435, the court noted that some courts "have found it persuasive that the first trial ended in a hung jury when deciding whether the error that occurred in the retrial was prejudicial. [Citations.]" Here, the jury indicated *130to the trial court that it was deadlocked, with a four to eight split (without indicating which group was in favor of conviction), so at least four jurors, and perhaps eight, voted to find defendant not guilty of the murder charge.

Furthermore, although there is no dispute that the evidence was sufficient to support the murder conviction, it was not "overwhelming," as the People would have it. A finding of implied malice "depends upon a determination that the defendant actually appreciated the risk involved, i.e., a subjective standard." (People v. Watson (1981) 30 Cal.3d 290, 296-297, 300-301, 179 Cal.Rptr. 43, 637 P.2d 279.) In this case, although the evidence that defendant actually appreciated the risk involved was substantial, it was also largely circumstantial and in significant part rested on inference of defendant's pre-collision state of mind from post-collision behavior. The jury reasonably could have found defendant did not act with implied malice, even if he appreciated the gravity of his actions immediately after the collision, and even though he should have known better from his past experience.

In short, we find that there is a reasonable probability that the trial court's erroneous instruction with respect to defendant's first trial was the determining factor why the second trial resulted in a conviction for murder, while the first trial did not. We therefore conclude the error requires reversal.

2. Other Instructional Error.**

III. DISPOSITION

The conviction of second degree murder is reversed. In all other respects, the judgment is affirmed.

We concur:

RAMIREZ, P.J.

CODRINGTON, J.