Judge RAGGI concurs in part and dissents in part in a separate opinion.
DRONEY, Circuit Judge:On September 20, 2011, Kevin Callahan (“Callahan”) was shot and killed during a confrontation with Thomas Wilson, a police officer employed by Suffolk County, New York. Christopher and Patricia Callahan— the decedent’s brother and mother—filed this suit pursuant to 42 U.S.C. § 1983 against Wilson, other Suffolk County police officers and employees, and Suffolk County, alleging, among other causes of action, that Officer Wilson’s use of deadly force violated the Fourth Amendment prohibition against excessive force. The case proceeded to trial. Following the completion of evidence, the district court declined to give plaintiffs’ proposed jury instruction regarding the use of deadly force by a police officer that tracked the deadly force instruction we endorsed in Rasanen v. Doe, 723 F.3d 325 (2d Cir. 2013). The jury returned a verdict in favor of Officer Wilson.
We agree with plaintiffs that the district court’s jury charge concerning deadly force was inconsistent with Rasanen, and this error was not harmless. Accordingly, we VACATE the judgment of the district court and REMAND for a new trial.
BACKGROUND
I. Fatal Shooting of Kevin Callahan
In the early afternoon of September 20, 2011, Suffolk County Police Officer Thomas Wilson responded to a radio call from a dispatcher reporting a situation involving a gun at the single-family home of Patricia Callahan in Selden, New York. The radio transmission indicated that Patricia Callahan—who was not at her home—had been on the phone with her son, Kevin Callahan,1 who was at the home in Selden and had told his mother that another person with him had a gun.
*147When Officer Wilson arrived at the Callahan home, two other Suffolk County officers, Dan Furey and Elisa McVeigh, had already arrived in response to the- dispatch. Officers Wilson, Furey, and McVeigh approached the front entrance to the home, where the screen door was closed but the front door was open. The officers knocked on the screen door, announced their presence, and entered to investigate; McVeigh searched the upstairs while Furey and Wilson went downstairs. Officer Wilson repeatedly announced the officers’ presence and asked if anybody was in the home or needed help. The officers did not hear any response.
Once they reached the bottom of the stairs, Officers Wilson and Furey split up—Wilson went to the left, and Furey went to the right. Officer Wilson testified that he saw a cleaver knife in the den area downstairs, which heightened his concern. Wilson cheeked one bedroom downstairs and then turned to another bedroom to his right. The door was partially open, and as Officer Wilson began to walk through it, he saw an individual through the partially opened door and called out, “police, I see you, ... don’t move.” J.A. 270. According to Wilson,, the person in the room “start[ed] to square off towards the door” and then forcefully attempted to close the bedroom door on Wilson. J.A. 271.
Officer Wilson testified that he had been holding his semi-automatic service pistol in his left hand down by his left leg, and when the door partially closed on him, he was pinned in the doorframe such that his hand holding the gun was on the other side of the door. Wilson testified that he then saw “some type of object” on the other side of 'the door, but his flashlight had been knocked out of his right hand and he had only a limited view, so he did not know what the object was. J.A. 275. He testified that the person on the other side of the door also made a sound like “some type of growl” that was “scar[]y.” J.A. 275. According to Wilson, he feared that he could be shot through the door or that his gun might be used against him, so he tried to free himself. He testified that, while he was trying to pull himself out of the door, he saw “a shadow coming around the door” and “a hand thrusting towards [him] with an object.” J.A. 309. Still unable to get out of the doorway, Officer Wilson fired his weapon while the gun was on the other side of the door. Wilson testified that after the initial gunshots, the door let up, which caused him to fall back. As he fell, he continued to fire, but now through the door.
According to Wilson, he then stood up and ran toward Officer Furey, took cover, and reported over the radio: “shots fired, man behind the door, unknown weapon or object.” J.A. 311-12. Emergency services arrived with more police officers. Officers entered the downstairs bedroom and saw a person later identified as Kevin Callahan behind the bedroom door, sitting on his heels with his hands under his chest and his chest on his thighs. The officers asked to see his hands and did not receive a response, at which point they placed him in handcuffs and. called medical services for him. Callahan died from his gunshot wounds.
Forensic analysis and an autopsy later established that Officer Wilson fired a total of four shots, three of which struck Callahan. Two shots were fired from inside the bedroom, and the other two shots were fired through the door. The first shot fired inside the bedroom resulted in a contact wound to Callahan’s back, and the second shot from inside the bedroom entered Callahan’s back right shoulder and exited from his right abdomen. The shot fired through the door that hit Callahan caused a wound in his front upper abdomen/chest *148area.-No weapon was found in the bedroom where Callahan was located.
II. Plaintiffs’ Excessive Force Claim
In,2012, Christopher and Patricia Callahan filed suit in the United States District Court for the Eastern District of New York against Suffolk County, Officer Wilson, and' other Suffolk County police officers and employees. The complaint asserted several state and federal claims in connection with Kevin Callahan’s death, including excessive force pursuant to 42 U.S.C. § 1983 and the Fourth Amendment to the U.S. Constitution.2
The excessive force claim proceeded to trial in July 2015.3 The jury returned a verdict in favor of Officer Wilson.4 Plaintiffs moved for judgment as a matter of law. or a new trial pursuant to Federal Rules of Civil Procedure SO and 59, which the district court denied. Judgment entered on January 29, 2016,5 and this appeal followed.
DISCUSSION
On appeal, plaintiffs argue that a new trial is, necessary because the jury was not properly instructed regarding the legal standards' that govern the use of deadly force under these circumstances. We review jury instructions de novo, considering the challenged instruction in light of the charge as a whole. Warren v. Pataki, 823 F.3d 125, 137 (2d Cir. 2016). A jury instruction is erroneous if it “misleads the jury as-to the correct legal standard or does not adequately inform the jury on the law.” Velez v. City of N.Y., 730 F.3d 128, 134 (2d Cir. 2013) (internal quotation marks omitted). An erroneous jury instruction requires a new trial unless the error is harmless. Id, We conclude that the use of force instructions here were inconsistent with our prior decision in Rasanen v. Doe, 723 F.3d 325 (2d Cir. 2013), and we cannot say that the error was harmless..
I. Instructional Error
In Rasanen v. Doe, decided approximately two years before the trial here, we explained that the jury charge in a Section 1983 police shooting case alleging excessive use of force by a police officer in circumstances similar, to those here must *149include a specific instruction regarding the legal justification for the use of deadly force, 723 F.3d at 333, 337, The instruction “must” convey “that the use- of force highly likely to have deadly effects is unreasonable unless the officer had probable cause to believe that the suspect posed a significant threat of death or serious physical injury to the officer or to others.” Id. at 334. Failure to so instruct the jury constitutes plain error, as it “deprives the jury of adequate legal guidance to reach a rational decision on [the] case’s fundamental issue.” Id. at 334-35 (alteration and internal quotation-marks omitted).
Defendants-Appellees suggest that Ra-sanen may no longer control, in light of the Supreme Court’s decision in Plumhoff v. Rickard, — U.S.-, 134 S.Ct. 2012,188 L.Ed.2d 1056 (2014). In Plumhoff, a dangerous police car chase of a fleeing suspect ended when police officers fired at the vehicle, killing the driver and a passenger. See id. at 2017-18. The Supreme Court concluded that the officers did not violate the Fourth Amendment’s prohibition against the use of excessive force. See id. at 2020-22. Plumhoff did not, however, involve any claim of instructional error, nor does the opinion alter the authorities on which Rasanen relied regarding the appropriate jury charge concerning the fatal shooting of suspects in the circumstances presented here. In particular, Plumhoff involved an application of Scott v. Harris, 550 U.S. 372, 127 S.Ct. 1769,167 L.Ed.2d 686 (2007), which was decided several years before Plumhoff and was discussed at length in Rasanen, see 723 F.3d at 333-34.
Nor does the Supreme Court’s recent decision in County of Los Angeles v. Mendez, — U.S. —, 137 S.Ct. 1539, 198 L.Ed.2d 52 (2017), undermine Rasanen’s holding as to the requirements for a jury charge in the type of excessive force case presented here. In Mendez, the Supreme Court rejected the Ninth Circuit’s “provocation rule” because that rule allowed a prior independent Fourth Amendment violation “to manufacture an excessive force claim where one would not otherwise exist.” Id. at 1546. In explaining its decision, the Court noted that “[t]he operative question in excessive force cases is ^whether the totality of the circumstances justified] a particular sort of search or seizure.’ ” Id. (quoting Tennessee v. Garner, 471 U.S. 1, 8-9, 105 S.Ct. 1694, 85 L.Ed.2d 1 (1985)). Importantly, Gamer articulated the probable cause requirement for police shooting cases upon which this Court relied in Rasanen. See Rasanen, 723 F.3d at 333 (“In Garner, the Supreme Court explained that ‘[w]here the officer has probable cause to believe that the suspect poses a threat of serious physical harm, either to the officer or to others, it is not constitutionally unreasonable to prevent escape by using deadly force.’ ” (quoting Garner, 471 U.S. at 11, 105 S.Ct. 1694)).
Thus, as relevant here, we conclude that neither Plumhoff nor Mendez overrules Rasanen, which remains the controlling law of this Circuit. Defendants do not attempt to distinguish Rasanen on the facts, which is unsurprising given the similarity between the circumstances of the shooting in that case and the underlying facts here. Accordingly, we are bound to follow Rasanen in this case.6 See Shipping Corp. of India v. Jaldhi Overseas Pte Ltd., 585 *150F.3d 58, 67 (2d Cir. 2009) (“[A] panel of our Court is bound by the decisions of prior panels until such time as they are overruled either by an en banc panel of our Court or by the Supreme Court.” (internal quotation marks omitted)).
Applying Rasanen, we conclude that the jury charge regarding deadly force was erroneous. Plaintiffs’ proposed jury instructions included the specific language we endorsed in Rasanen and cited that decision. At the charge conference, plaintiffs’ counsel also orally requested that the jury charge include that language, arguing that “it’s not just a matter of semantics.”7 J.A. 566. The district court denied plaintiffs’ request, and instead instructed the jury in accordance with the general excessive force instructions that apply in situations involving non-deadly force,8 with two modifications: the charge specifically referred to “deadly force” in two places, and it included language about an officer’s probable cause to believe that he or she faces a threat of death or serious injury. The exact language of the district court’s charge was as follows:
A person has the right, under the United States Constitution, to be free from the use of excessive force.
A police officer is entitled to use reasonable force. A police officer is not entitled to use any force beyond what is necessary to accomplish a lawful purpose. Reasonable force may include the use of deadly force.
A police officer may use deadly force against a person if a police officer has probable cause to believe that the person poses a significant threat of death ‘or serious physical injury to the officer or others.
In determining whether the police officer used reasonable force, the actions of the police officer are measured by the test of what a reasonable and prudent police officer would have done under the same circumstances confronting the police officer without regard to the police officer’s underlying subjective intent or motivation.
That means the evil intentions will not be considered excessive force if the force used was in fact reasonable.
On the other hand, an officer’s good intentions will not make the use of excessive force constitutional. The reasonableness of a particular use of force must be judged from the perspective of a reasonable officer on the scene rather than with hindsight.
The nature of reasonableness must allow for the fact that police officers are often forced to make split-second judgments under circumstances that are tense, uncertain and rapidly evolving about the amount of force that is necessary in a particular situation.
This reasonableness inquiry is an objective one. The question is whether the defendant police officer’s actions w[ere] objectively reasonable in light of the facts and circumstances confronting the police officer.
In determining whether the police officer used excessive force, you may consider,' one, the need for the application of force; two, the relationship between the need and the amount of force used; three, the threat reasonably perceived *151by the police officer; and, four, any efforts made to temper the severity of a forceful response.
J.A. 606-06.
Unlike in Rasanen, the charge here did refer to the probable cause necessary for an officer to reasonably use deadly force. But the instruction did not track the language from Rasanen, and we conclude that it is materially different from the language we approved there, even with the reference to “probable cause.” In Rasanen, we held that the jury “must” be instructed that the use of deadly force is “unreasonable unless the officer had probable cause to believe that the suspect posed a significant threat of death or serious physical injury to the officer or to others,” 723 F.3d at 334 (emphasis added); here, the jury was instructed that an officer “may use deadly force ... if the officer has the requisite probable cause, J.A. 605 (emphases added).
Although these two formulations both refer to the probable cause requirement for the use of deadly force, they are not functionally equivalent. In Rasanen, we explicitly distinguished between the permissive “may/if” language and the restrictive “unless/only” language by reference to the New York State Police administrative manual before the jury in that case. See Rasanen, 723 F.3d at 335-37. The relevant provision in that manual used nearly identical language to the charge here, stating: “A[n officer] may use deadly physical force against another person when they reasonably believe it to be necessary to defend the [officer] or another person from the use or imminent use of deadly physical force.” Id. at 336 (internal quotation marks omitted). In concluding that this formulation did not correctly instruct the jury, we explained that the problem with the “may/if” language is that it “is not framed in exclusive and restrictive terms.” Id. at 337. That formulation was insufficient because it did not convey that an officer’s use of deadly physical force is reasonable, and therefore legally permissible, only in a specific circumstance.9 Id.
Thus, the charge given to the jury here—which used the same permissive “may/if” language that we specifically rejected in Rasanen—was deficient. This error in the formulation of the specific deadly force instruction was compounded by the balance of the charge regarding excessive force, which further weakened the probable cause requirement. For example, the jury was also told that an officer “is entitled to use reasonable force,” which “may include the use of deadly force.” J.A. 605. Later in the charge, the district court again instructed the jury according to language that applies to non-deadly uses of force.
These instructions were further “dilute[d],” Rasanen, 723 F.3d at 335, by suggesting that the jury could find that Officer Wilson’s shooting of Callahan complied with constitutional standards for reasons other than the fact that Wilson had probable cause to believe that Callahan posed a significant threat of death or serious injury to Wilson or others. Similar to Rasanen, the entirety of the charge here allowed the jury to conclude that “the shooting seemed necessary” because Wil*152son “acted reasonably under the circumstances,” even if the jury concluded that Callahan did not pose that type of threat, Id. at 336 (emphasis omitted). Rasanen makes clear, however, that an officer’s use of deadly force in a police shooting case is not, as a matter of law, reasonable unless that officer had probable cause to believe that the individual posed a significant threat of death or serious physical injury to the officer or others. Id. at 334. Thus, the charge here suffers from the same “fatal defect” as the charge in Rasanen—“the jury did not know, because it was not told,” that it could not properly conclude that the shooting was justified unless it found that the probable cause requirement was met. Id. at 336.
Even though the jury was told that Officer Wilson would have been permitted to use deadly force if he had probable cause to believe that Callahan posed a significant threat of death or serious injury, our required charge is more demanding; under Rasanen, such probable cause is the only situation in which Wilson was permitted to use deadly force, and the jury must be so instructed.
II. Harmlessness Analysis
An erroneous jury instruction requires a new trial unless the error was harmless. Uzoukwu v. City of N.Y., 806 F.3d 409, 418 (2d Cir. 2015). “An error is harmless only if the court is convinced that the error did not influence the jury’s verdict.” Id. (internal quotation marks omitted). We are not persuaded that the error in the deadly force charge given here was harmless.
The focus of the trial was how the events unfolded in the Callahan basement that afternoon. As discussed above, under the instructions the jury was given, the jury could have reached its verdict without concluding that Officer Wilson had probable cause to believe .that Callahan posed a threat of-death or serious injury. That conclusion is compelled by the fact that the instructions here, allowed the jury to.return . a defense verdict if, it found that Wilson acted according to an overly general standard of "reasonableness” that does not comport with the holding of Rasanen—that deadly force, in -, this context is reasonable only if the requisite probable cause standard is satisfied. On this record, we cannot determine whether the jury answered the critical question and concluded that probable- cause existed, or instead decided the case according to a more general standard that is inconsistent with our Circuit’s precedent in this particular type of case. Because this error allowed the jury to decide the case on different grounds than Rasanen permits, we are not convinced that, the error did not .influence the jury’s verdict, and we therefore cannot say that it was harmless,10
III. Evidentiary Rulings
Because we have concluded that plaintiffs are entitled to a new trial on the basis of instructional error, we need not consider their remaining arguments. Nevertheless, we briefly, address the evidentiary issues raised on appeal in order to provide some guidance in connection with the retrial in this case, as the issues appear likely to recur. See Rentas v. Ruffin, 816 F.3d 214, 223 (2d Cir. 2016).
*153Plaintiffs contend that the district court erred by excluding two pieces of evidence at trial: (1) expert testimony about police protocol, and (2) prior incidents in which Officer Wilson fired his weapon. We review a district court’s evidentiary rulings, including those as to expert testimony, for abuse of discretion. Lore v. City of Syracuse, 670 F.3d 127, 155 (2d Cir. 2012). A district court abuses its discretion if it makes “an error of law or a clear error of fact.” Abascal v. Fleckenstein, 820 F.3d 561, 564 (2d Cir. 2016) (internal quotation marks omitted). Upon review of the trial record, we identify no such error in the district court’s decisions.
At trial, plaintiffs attempted to introduce expert testimony by former New York City police officer Joseph Zogbi regarding police training and protocol. As explained in his report, Zogbi concluded that Officers Wilson and Furey did not act in accordance with standard police room clearing techniques when they arrived at the Callahan residence, and that the officers had not been properly trained with respect to “basic tactical movement and mindset.” J.A. 156. The district court precluded , Zogbi from testifying as to plaintiffs’ excessive force claim.11
We conclude that this decision was not an abuse of discretion.- As we have explained, a district court'has “broad discretion” to carry out its “gatekeeping function” with respect to expert testimony, which involves ensuring that the proffered testimony “is relevant to the task at hand,” In re Pfizer Inc. Sec. Litig., 819 F.3d 642, 658 (2d Cir. 2016) (internal quotation marks omitted). Here, Zogbi’s expert report focused on whether Officer Wilson’s training was adequate and what a properly trained officer would or would not have done in a similar situation. Contrary to plaintiffs’ arguments, the district court acted -within its discretion in concluding that these opinions are not relevant to Wilson’s liability on the excessive force claim, as the type of training that Wilson received does not shed light, on the dispositive, question here—-whether Wilson had probable cause to believe that Callahan posed a significant threat to his safety. Nor are Zogbi’s opinions about police training relevant to Wilson’s credibility in recounting what happened in the Callahan basement that afternoon.
Moreover, expert testimony is not admissible under Federal Rule of Evidence 702 if it “usurp[s] ... the role of the jury in applying th[e] law to the facts before it,” as such testimony “undertakes to tell the jury what result to reach, and thus attempts to substitute the expert’s judgment for the jury’s.” Nimely v. City of N.Y., 414 F.3d 381, 397 (2d Cir. 2005) (first alteration in original) (internal quotation marks omitted). In this case, Zogbi’s suggestions that Officer Wilson did not act reasonably under the circumstances intrude on the jury’s exclusive role as the finder of facts. The district court therefore acted within its discretion in .precluding Zogbi from testifying with respect to plaintiffs’ excessive force claim against Officer Wilson.
Regarding Officer Wilson’s prior discharges of his weapon; plaintiffs sought to introduce evidence -that' Wilson had twice fired his pistol at dogs that he perceived to be threatening him while he was on duty. The district court ruled that the evidence was not admissible, and we conclude that this decision was also within the court’s discretion.
*154Plaintiffs point to this Court’s “inclu-sionary approach” to evidence of prior bad acts under Federal Rule of Evidence 404(b), United States v. Lombardozzi, 491 F.3d 61, 78 (2d Cir. 2007), and argue that the evidence should have been admitted to show Officer Wilson’s mental state when he fired at Callahan and to discredit Wilson’s testimony that he perceived the situation to be dangerous. Even if this evidence was offered for a proper non-propensity purpose—an issue that we need not and do not reach—the district court was nevertheless entitled to conclude that the prejudicial effect of the evidence substantially outweighed its limited probative value. See United States v. Scott, 677 F.3d 72, 79, 83-85 (2d Cir. 2012). It was therefore not an abuse of discretion for the court to conclude that the evidence was inadmissible.
In sum, on the record of this trial, the district court acted within its discretion in excluding Zogbi’s expert testimony and the evidence concerning Officer Wilson’s prior weapons discharges. Although we conclude that there was no abuse of discretion here, we note that any retrial may present different circumstances that lead to different conclusions.
CONCLUSION
The instructions given to the jury in this case regarding the lawfulness of Officer Wilson’s use of force against Kevin Callahan misstated the law of our Circuit as articulated in Rasanen, 723 F.3d at 333-38, and we cannot say that this error was harmless. We therefore VACATE the judgment of the district court and REMAND for a new trial.
. At the time, Kevin Callahan was twenty-six years old.
. Kevin Callahan's claim under Section 1983 survived his death for the benefit of his estate, and is brought by his brother, Christopher, the administrator of his estate. See Barrett v. United States, 689 F.2d 324, 331 (2d Cir. 1982), Christopher Callahan and Patricia Callahan were named as plaintiffs for additional claims not relevant to this appeal.
. The trial also included an Eighth Amendment claim against Suffolk County Police Sergeant Scott Greene for deliberate indifference to the medical needs of Kevin Callahan after the shooting. The district court bifurcated the trial of plaintiffs’ claims, such that the excessive force and deliberate indifference claims were tried together in the first phase, after which a second trial would address Monell liability of Suffolk County and other related claims if necessary. The first trial also originally included false arrest claims, but plaintiffs voluntarily dismissed those claims after their case-in-chief.
. The jury also returned a defense verdict on the deliberate indifference claim against Sergeant Greene, which pláintiffs have not challenged here. Defendants raised a qualified immunity defense as to both the excessive force and deliberate indifference claims as part of their oral Rule 50 motion, which the district court denied in its entirety. Qualified . immunity was not. otherwise litigated at trial, and defendants have not raised it on appeal.
. Although the jury’s verdict addressed plaintiffs' claims against only Wilson and Greene, it appears that the district court entered judgment in favor of all defendants. The record is not entirely clear, but it appears the district court concluded that the defense verdict in the first phase of the bifurcated trial necessarily defeated plaintiffs' remaining claims.
. We acknowledge that, when faced with the question we previously addressed in Rasanen, other Circuits have reached different, and sometimes opposite, conclusions. See Johnson v. City of Phila., 837 F.3d 343, 349 (3d Cir. 2016); Noel v. Artson, 641 F.3d 580, 587 (4th Cir. 2011); Penley v. Eslinger, 605 F.3d 843, 850 (11th Cir. 2010); Acosta v. Hill, 504 F.3d 1323, 1324 (9th Cir. 2007).
. Unlike Rasanen, which considered the excessive force charge under plain-error review because no clear objection was made to that portion of the charge, see 723 F.3d at 333, plaintiffs here clearly preserved their objection. See J.A. 565-67.
. See, e.g., Terranova v. New York, 676 F.3d 305, 307, 309 (2d Cir. 2012); United States v. Schatzle, 901 F.2d 252, 254-55 (2d Cir. 1990).
. The dissent understates the prominence of this manual provision in Rasanen by characterizing it as one piece of evidence among many in the trial record. See Dissenting Op., post at 156. To the contrary, Rasanen explained that the deadly force provision played a more important role at the trial in that case: the district court instructed the jury that certain manual provisions, including the deadly force provision, “apply to the case,” and the jury indicated that it was specifically considering that provision during its deliberations. 723 F.3d at 336-37 (internal quotation marks omitted).
. That the parties referred to probable cause during their summations does not, as the dissent suggests, render the error here harmless, See Dissenting Op., post at 156-58, The parties various arguments did not cure the instructional error described above, especially in light of the court’s instructions that the jury was required to follow the law as articulated by the court, not the lawyers.
. Because the trial was bifurcated, the district court ruled that Zogbi would be permitted to testify in the second phase of the proceedings as to plaintiffs’ municipal liability claims.