United States v. Lashay Lopez , 913 F.3d 807 ( 2019 )


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  •                       FOR PUBLICATION
    UNITED STATES COURT OF APPEALS
    FOR THE NINTH CIRCUIT
    UNITED STATES OF AMERICA,                    No. 16-10261
    Plaintiff-Appellee,
    D.C. No.
    v.                       4:14-cr-01750-RCC-
    DTF-1
    LASHAY MARIE LOPEZ,
    Defendant-Appellant.                     OPINION
    Appeal from the United States District Court
    for the District of Arizona
    Raner C. Collins, Chief Judge, Presiding
    Argued and Submitted November 17, 2017
    San Francisco, California
    Filed January 10, 2019
    Before: Johnnie B. Rawlinson and Jay S. Bybee, Circuit
    Judges, and Paul L. Friedman,* District Judge.
    Opinion by Judge Bybee;
    Dissent by Judge Rawlinson
    *
    The Honorable Paul L. Friedman, United States District Judge for
    the District of Columbia, sitting by designation.
    2                    UNITED STATES V. LOPEZ
    SUMMARY**
    Criminal Law
    The panel vacated a conviction for false statement during
    the purchase of a firearm, aggravated identity theft, and felon
    in possession of a firearm, in a case in which the only issue
    before the jury was the affirmative defense of duress.
    The panel held that expert testimony on Battered Woman
    Syndrome may be used by a defendant to support her duress
    defense and rehabilitate her credibility, that the district court
    therefore erred in precluding the defendant’s expert witness
    from testifying, and that this decision was prejudicial to her
    defense.
    The panel held that the district court did not abuse its
    discretion by excluding a video of the defendant’s entire
    interview in jail with ATF agents, where the evidence would
    have consisted nearly exclusively of hearsay statements,
    including those made by the defendant.
    Dissenting, Judge Rawlinson could not say that the
    district judge abused his discretion in determining that the
    expert testimony on Battered Woman Syndrome was not
    admissible in the context of establishing a duress defense, as
    opposed to the usual context of its admission—to establish
    self-defense.
    The panel remanded for a new trial.
    **
    This summary constitutes no part of the opinion of the court. It has
    been prepared by court staff for the convenience of the reader.
    UNITED STATES V. LOPEZ                     3
    COUNSEL
    Michael L. Burke (argued), Assistant Federal Public
    Defender; Jon M. Sands, Federal Public Defender; Office of
    the Federal Public Defender, Phoenix, Arizona; for
    Defendant-Appellant.
    Erica Anderson McCallum (argued), Assistant United States
    Attorney; Robert L. Miskell, Appellate Chief; Elizabeth A.
    Strange, Acting United States Attorney; United States
    Attorney’s Office, Tucson, Arizona; for Plaintiff-Appellee.
    OPINION
    BYBEE, Circuit Judge:
    Defendant-Appellant Lashay Marie Lopez was convicted
    on three federal charges stemming from her purchase of a
    firearm through the use of false identification (ID). Because
    Lopez admitted to the offense conduct, the only issue before
    the jury was the affirmative defense of duress. Lopez claims
    that she purchased a handgun for Hector Karaca using her
    identical twin sister’s ID in violation of her probation and
    federal law because Karaca threatened to harm Lopez and her
    family if she failed to acquire a gun for him.
    In support of her duress defense, Lopez asked the district
    court to allow her to introduce expert testimony on Battered
    Woman Syndrome (BWS) and the effects of past abuse.
    Lopez, who had been physically and sexually abused by her
    stepfather, contended that this evidence would “help provide
    context” to the jury regarding her fear of Karaca and why she
    did not seek help from the police. Lopez similarly asserted
    4                   UNITED STATES V. LOPEZ
    that the expert’s description of the “characteristics of [a]
    domestic violence victim” would help explain her
    “counterintuitive” behavior regarding Karaca. The court,
    however, excluded this evidence in a series of oral rulings,
    concluding that BWS evidence is incompatible with the
    duress defense’s use of an objective reasonable-person
    standard.
    We join the weight of authority in holding that such
    expert testimony may be used by a defendant to support her
    duress defense and rehabilitate her credibility. We therefore
    find that the district court committed legal error in precluding
    Lopez’s expert witness from testifying and conclude that this
    decision was prejudicial to her defense. Accordingly, we
    vacate her conviction and remand this case to the district
    court for a new trial.
    I. FACTS AND PROCEEDINGS
    A
    Lopez, who was twenty-seven years old at the time of the
    crimes at issue, dated Karaca when the two were teenagers.
    The relationship ended when Karaca was sentenced to eight-
    years imprisonment in 2006 for a convenience-store
    shooting.1 Karaca was released from prison during the Fall of
    2013, but mere weeks later, police were searching for him in
    connection with a double homicide in Phoenix, Arizona.
    In November 2013, Karaca arrived at Lopez’s home in
    Tucson, where she lived with her mother, her identical twin
    1
    It was, however, disputed at trial whether the two remained in
    contact while he was in prison.
    UNITED STATES V. LOPEZ                      5
    sister, her sister’s two young children, and a teenage sibling.
    Karaca and Lopez spoke for several hours and drank together.
    Karaca eventually admitted to Lopez that night that he was
    “on the run” from the police due to a shooting and asked her
    if she knew where he could get a gun. She told him she did
    not, and Karaca accepted her answer. He later began making
    sexual advances towards Lopez, suggesting that they restart
    their relationship. Lopez initially rejected these overtures,
    telling Karaca that she was currently involved with someone
    else. Lopez “push[ed] him away” and “told him no . . . but he
    didn’t stop” and “so [Lopez] just gave in.” Karaca eventually
    left without further incident.
    Two days later, however, Karaca returned to Lopez’s
    home and again asked her about acquiring a gun. She
    explained to him at this point that she could not purchase a
    gun or “be around” one because she was on probation on a
    felony drug conviction. Karaca responded by grabbing Lopez
    by the arm and threatening that, if she failed to get him a gun,
    “he[] [would] come back and shoot up [her] house and he
    [would] hurt [her] family.” Several days later, Karaca
    returned to Lopez’s home and was limping. He told her that
    he was in a “shootout” in the desert during a drug deal and
    was shot in the leg. Lopez later testified at her trial that
    Karaca’s reference to a “shootout” made her believe that he
    already had a gun, which increased her fear that he would
    harm her family.
    Four days later, Karaca returned and demanded that
    Lopez purchase a gun for him that day from a nearby
    pawnshop. She again responded that she was on probation.
    Karaca then insisted that Lopez pose as her identical twin
    sister during the purchase, demanding that they go to Lopez’s
    home and retrieve her sister’s ID. After Lopez made various
    6                 UNITED STATES V. LOPEZ
    excuses as to why she could not obtain the ID that day,
    Karaca grabbed her again and threatened: “I already told you
    what I was going to do if you don’t get this gun for me. I
    know you don’t want anything happening to your mom or
    your sisters.” The two retrieved the ID and went to the
    pawnshop that same day, where Lopez purchased a Ruger
    pistol using the ID and her sister’s identifying information.
    Shortly after she left the store, Karaca grabbed her purse,
    removed the gun, and walked away.
    Two days later, Lopez saw Karaca one last time before
    her arrest. The two went together to a family barbeque hosted
    by her twin sister’s ex-husband, who was also Karaca’s
    friend. The three left the party at one point to go to the store,
    where Karaca accused Lopez of flirting with her sister’s ex-
    husband and slapped her in the face. Karaca initially left but
    eventually returned to the party. Later that evening, Karaca
    grabbed Lopez’s arm and told her he would “f--- [her] up, and
    no one will do anything about it.”
    Twelve days after purchasing the gun for Karaca, Lopez
    met with her probation officer and a U.S. Marshal, who was
    searching for Karaca. Lopez initially denied knowing
    Karaca, but after the probation officer found the pawnshop
    receipt in Lopez’s purse, she admitted that she had purchased
    a gun for Karaca. Lopez also stated she was seeing Karaca
    romantically, referring to him at one point as “my man.”
    Lopez did not explain to the officers at this juncture why she
    had bought the gun for Karaca and did not claim that Karaca
    had threatened her. After refusing to provide them with any
    specifics on Karaca’s location, Lopez was sent to jail. She
    later explained at trial that she was afraid that Karaca would
    harm her if he discovered she had spoken to the authorities.
    UNITED STATES V. LOPEZ                     7
    The following day, two agents with the Bureau of
    Alcohol, Tobacco, Firearms, and Explosives (ATF)
    interviewed Lopez in a private room in the jail. For the first
    time, Lopez claimed that she had purchased the gun for
    Karaca because he had threatened her and her family. She
    also informed the agents that Karaca had told her he had
    another gun. At trial, Lopez claimed that she only told the
    ATF agents these details—as opposed to her probation officer
    the previous day—because she felt “safer in the jail”:
    “[Karaca] can’t get me when I’m . . . in jail. There is no way
    of him getting ahold of me and finding out what I’m saying”
    to the agents. Shortly thereafter, the police located Karaca in
    Tucson. He stole a vehicle using the gun purchased by Lopez
    and led the police on a lengthy car chase, which ended with
    Karaca taking his own life.
    B
    In late 2014, Lopez was indicted on three federal charges:
    (1) false statement during the purchase of a firearm under
    
    18 U.S.C. §§ 922
    (a)(6), 924(a)(2); (2) aggravated identity
    theft under 18 U.S.C. §§ 1028A(a)(1), (c)(3); and (3) felon in
    possession of a firearm under 
    18 U.S.C. §§ 922
    (g)(1),
    924(a)(2). The case proceeded to a jury trial. Lopez
    stipulated to many of the elements of these offenses and
    conceded that she purchased the firearm using the false 
    ID.
    Her trial strategy thus consisted entirely of proving that she
    acted under duress as a result of Karaca’s threats against her
    and her family.
    “Duress is not a statutory defense, but a common-law
    defense that allows a jury to find that the defendant’s conduct
    is excused, even though the government has carried its burden
    of proof.” United States v. Kuok, 
    671 F.3d 931
    , 947 (9th Cir.
    8                 UNITED STATES V. LOPEZ
    2012). In order to establish the defense, a defendant bears the
    burden of proving three elements by a preponderance of the
    evidence: “(1) [s]he was under an immediate threat of death
    or serious bodily injury, (2) [s]he had a well grounded fear
    that the threat would be carried out, and (3) [s]he had no
    reasonable opportunity to escape.” Id.; see also United States
    v. Navarro, 
    608 F.3d 529
    , 532 (9th Cir. 2010); United States
    v. Johnson, 
    956 F.2d 894
    , 897 (9th Cir. 1992), superseded by
    regulation on other grounds; United States v.
    Contento-Pachon, 
    723 F.2d 691
    , 693 (9th Cir. 1984)). If
    successful, a defendant is “legally excuse[d]” of the crime
    committed and must be found not guilty. Navarro, 
    608 F.3d at
    532–33.
    Prior to trial, Lopez advised the district court of her intent
    to introduce testimony from Dr. Cheryl Karp, an expert “on
    issues of trauma, domestic violence, and victim behaviors.”
    Lopez asserted that Dr. Karp’s testimony would assist the
    jury “in understanding the evidence because . . . the trial
    [would] involve evidence as to coercion and threats of
    violence leading up to the day Karaca took her from her home
    and forced her to purchase a firearm for him.” Lopez further
    contended that Dr. Karp’s testimony regarding “behaviors of
    victims of domestic violence” would “help provide context”
    to her duress defense, including whether her fear of Karaca
    was “well-grounded” and whether she had a “reasonable
    opportunity” to escape from him. Finally, Lopez asserted that
    Dr. Karp’s testimony would “liken to that of standard
    government expert testimony in a domestic violence case
    where there is the counter-argument that the victim’s
    behavior was not consistent or credible victim behavior.”
    The government moved in limine to exclude this
    testimony, primarily arguing that the testimony would be
    UNITED STATES V. LOPEZ                      9
    irrelevant because the duress defense applies an objective
    standard. In an oral ruling, the district court described the
    issue as “pretty close” but ultimately granted the
    government’s motion: “I don’t see how [Dr. Karp] can do
    anything to tell this jury how a reasonable person would have
    acted under the circumstances, so I’m not letting her in for
    that purpose.” Lopez moved for reconsideration at several
    points during trial, which the court orally denied each time.
    The district court did, however, instruct the jury on the duress
    defense and permitted Lopez herself to testify about how her
    experience as an abuse victim influenced her interactions with
    Karaca.
    After the jury rendered a guilty verdict on all counts,
    Lopez moved for a new trial, arguing in part that the
    preclusion of Dr. Karp’s testimony prejudiced her defense.
    Included with the motion was Dr. Karp’s affidavit, in which
    she provided more detail as to her intended testimony.
    Specifically, Dr. Karp asserted that “[t]he jury [did] not have
    the proper knowledge base to understand some of the
    psychological explanations as to the dynamics involved in
    Battered Woman Syndrome and why Battered Women
    remain with abusive men, including the theory of Learned
    Helplessness.” She further attested that her “testimony would
    also have given the jury an opportunity to hear from an expert
    on Trauma and how that may have influenced [Lopez’s]
    feelings when she did not seek the help of the police, given
    her own trauma history of being sexually abused by her step-
    father and the police never protecting her.” The court denied
    the motion in an oral ruling.
    The court eventually sentenced Lopez to a combined 30-
    months imprisonment. Lopez filed a timely appeal, and we
    have jurisdiction under 
    28 U.S.C. § 1291
    .
    10                    UNITED STATES V. LOPEZ
    II. ANALYSIS
    Lopez claims that two erroneous evidentiary rulings
    prejudiced her duress defense. First, she argues that the
    district court erroneously excluded Dr. Karp’s testimony
    regarding BWS. Because we hold that the district court
    committed reversible error by barring this expert testimony,
    we devote the bulk of our discussion below to addressing why
    such evidence is generally admissible. We then conclude by
    briefly addressing (and ultimately rejecting) Lopez’s separate
    argument that the district court erred by excluding a video of
    her entire interview in jail with the ATF agents.2
    A
    Lopez argues that Dr. Karp’s testimony supports two
    elements of the duress defense: (1) whether Lopez had a
    well-grounded fear that Karaca would harm her and her
    family if she refused to purchase a gun for him and (2)
    whether she had a reasonable opportunity to escape from him
    by calling the police. The government continues to counter
    that BWS evidence is incompatible with a duress defense
    2
    Lopez also claims that the government engaged in prosecutorial
    misconduct during its cross examination of her by stating, in response to
    one of her answers, “Well, that’s just a lie right now” and, at several other
    points, “Does that make sense?” Although the district court gave the jury
    a curative instruction—“that what the lawyers said in their questioning and
    cross-examination is not evidence”—Lopez contends that the court should
    have cited the prosecutor’s specific comments. On appeal, the
    government concedes that the “that’s just a lie” comment was improper
    but contends that the curative instruction was sufficient and that any
    potential error was harmless. Given the government’s concession and the
    fact that we are remanding for a new trial, we need not address this claim.
    Similarly, we also decline to address Lopez’s claim of cumulative error.
    UNITED STATES V. LOPEZ                           11
    because both aforementioned elements assess objective
    reasonableness. See United States v. Willis, 
    38 F.3d 170
    , 176
    (5th Cir. 1994); Johnson, 
    956 F.2d at 898
    . BWS, the
    government argues, reflects only a defendant’s “subjective
    vulnerability.”
    Like the majority of courts that have addressed this
    question, we are unpersuaded by this proposed distinction.
    Before turning to these authorities, however, we must first
    address our decision in Johnson, which the government
    argued before the district court controls this question.3
    1
    Johnson involved several female defendants who were
    convicted for their nominal participation in a violent drug
    organization. 
    956 F.2d at 897
    . Three of the defendants—
    Wood, Johnson, and Breck—had claimed that they acted
    under duress from the organization’s “kingpin,” who
    threatened and assaulted two of the defendants and their
    immediate family members. 
    Id.
     at 897–99, 901–02. The
    district court permitted testimony on BWS from an expert on
    behalf of Wood, but denied Johnson and Beck the opportunity
    to call an expert or cross-examine Wood’s expert. 
    Id.
    Because the jury nonetheless found all three defendants
    guilty, “[t]he dominant issue on the appeals of” these
    3
    The government sparingly cites Johnson on appeal, and it no
    longer appears to assert that we decided in Johnson that BWS supports
    evidence only of subjective reasonableness. But because at least one other
    court has interpreted Johnson in this manner, we must ensure that we are
    not bound by our prior decision. See Willis, 
    38 F.3d at 175
     (“[T]he
    Johnson court found that subjective evidence of the battered woman’s
    syndrome could not be taken into account in determining criminal liability
    and thus could not upset the convictions.”).
    12                UNITED STATES V. LOPEZ
    defendants was “the duress defense as it interacts with
    sentencing.” Id. at 897. Indeed, we remanded these
    defendants’ cases for resentencing, in part, because the
    district court erroneously believed that it lacked the authority
    under the sentencing guidelines to depart downward based on
    duress if a defendant failed to prove the affirmative defense
    at trial. Id. at 900–03.
    Before addressing each defendant’s claims, we discussed
    the principles underlying duress generally. We specified that
    the defense applies an objective, reasonable-person standard:
    The formula is addressed to the impact of
    a threat of force upon a reasonable person:
    The fear must be “well-grounded.” There
    must be no “reasonable” opportunity to
    escape. The formula is in harmony with the
    analysis of duress in the Model Penal Code
    which recognizes duress in the use of
    unlawful force “that a person of reasonable
    firmness in his [or her] situation would have
    been unable to resist.” American Law
    Institute, Model Penal Code § 2.09(i) (1985).
    Id. at 898. In determining whether a fear is well-grounded,
    the jury may “take into account the objective situation in
    which the defendant was allegedly subjected to duress. Fear
    which would be irrational in one set of circumstances may be
    well-grounded if the experience of the defendant with those
    applying the threat is such that the defendant can reasonably
    anticipate being harmed on failure to comply.” Id. (emphasis
    added). In Johnson, for instance, there was little doubt that
    the jury, in assessing the reasonableness of the defendants’
    fear, could properly consider the fact that the defendants had
    UNITED STATES V. LOPEZ                       13
    witnessed the kingpin commit brutal acts against others. See,
    e.g., id. at 898 (“Given the violence that [one defendant] had
    already observed on the part of [the kingpin], including his
    putting of dynamite in her housemate[’s] . . . mouth, she was
    under threat of immediate severe physical harm.”).
    The more difficult question was “whether a special
    vulnerability to fear—a vulnerability not produced by those
    persons causing the defendant’s criminal action—may be
    taken into account.” Id. at 898 (emphasis added). We noted
    that, “[a]s a defense to a charge of criminal conduct, such
    subjective vulnerability has not been admitted.” Id. Our
    analysis at this juncture was brief and opaque, however, as we
    provided no elaboration on what constitutes a special,
    subjective vulnerability to fear.
    Instead, we reasoned that there are factors related solely
    to the defendant—rather than to the coercing, threatening
    party—that may be considered in the reasonableness inquiry.
    Relying on the Model Penal Code (MPC), we highlighted
    “[s]tark, tangible factors,” such as a person’s “size, strength,
    age, or health.” Id. (quoting MODEL PENAL CODE § 2.09 cmt.
    3 (AM. LAW INST. 1985)); see also MODEL PENAL CODE
    § 2.09 cmt. 3 (“The [‘person of reasonable firmness’]
    standard is not, however, wholly external in its reference;
    account is taken of the actor’s ‘situation,’ a term that should
    here be given the same scope it is accorded in appraising
    recklessness and negligence.”). Indeed, a 5’ 3”, 100 lbs., 80-
    year old individual will, all else equal, likely perceive a threat
    of physical violence differently than a 6’ 4”, 200 lbs., 25-year
    old. While we then acknowledged that the MPC did not list
    “gender as one of the ‘stark, tangible factors,’” we assured
    that our analysis would demonstrate that “there are sets of
    14               UNITED STATES V. LOPEZ
    circumstances in which gender is also a factor to be
    considered.” Johnson, 
    956 F.2d at 898
    .
    Once we turned to the claims raised by three of the female
    defendants, it became evident that our mention of “gender”
    referred to BWS evidence. At trial, one of the defendants,
    Wood, “buttressed her contention of duress with the” expert
    testimony of a psychologist who “had substantial experience
    in dealing with battered women.” 
    Id. at 899
    . Summarizing
    this testimony and the texts the psychologist cited, we
    explained that BWS
    is a set of psychological and behavioral
    reactions exhibited by victims of severe,
    long-term, domestic physical and emotional
    abuse. L. Walker, The Battered Woman
    Syndrome (1984). Battered woman syndrome
    is not a mental disease or defect; rather,
    battered woman syndrome is a post-traumatic
    stress disorder. Its psychological effects are
    often similar to the effects of imprisonment on
    kidnap victims and prisoners of war. Once
    battered women believe themselves to be
    helpless victims of abusive men, they behave
    like hostages and link themselves to their
    captors out of fear that it is the only way to
    survive. Battered women are unable to
    respond effectively to violence because they
    are psychologically trapped in the violent
    relationship.
    Repeated beatings diminish the battered
    woman’s motivation to respond and instill in
    her a negative belief about the effectiveness of
    UNITED STATES V. LOPEZ                    15
    her actions. This “learned helplessness”
    keeps the battered woman from leaving her
    batterer. One of the primary survival skills of
    battered women is hyperalertness. The
    battered woman learns to be sensitive to her
    environment to prevent further violence to
    herself. The development of survival skills,
    however, comes “at the expense of escape
    skills.” L. Walker at 33 & 87-89. Society
    often misinterprets the survival skills of
    battered women as signs of passivity and
    weakness coupled with an unwillingness to
    leave the violent relationship. Id. at 33. A
    common misunderstanding is that the battered
    woman’s responses are indicative of weak
    character. Rather, these responses must be
    seen as attempts to cope with the abusive and
    controlling environment in which she lives
    and from which she is helpless to escape.
    Id.
    Although the duress defense did not sway the jury, we
    held that the district court “should properly consider the
    individual before the court and her particular vulnerability”
    in sentencing. Id. BWS evidence, we concluded, “has a
    particular relation to the defense of duress as it has been
    expanded by the commentary to the Model Penal Code.” Id.
    at 900. We highlighted the MPC’s citation to “[a] leading
    authority on the common law [who] added that the defense
    applies when the defendant is so far ‘in thrall to some power’
    that a legal sanction would be ineffective in controlling any
    choice that may be made.” Id. (quoting GLANVILLE
    WILLIAMS, CRIMINAL LAW: THE GENERAL PART 755–62 (2nd
    16                UNITED STATES V. LOPEZ
    ed. 1961)); see also MODEL PENAL CODE § 2.09 cmt. 2. We
    described this model of duress as a “substantial expansion of
    the defense,” which we cautioned “may go too far if not
    linked to gross and identifiable classes of circumstances.” Id.
    But we concluded that “[b]attered women are in
    circumstances forming such a class.” Id.
    Regrettably, our discussion in Johnson of BWS provides
    no guidance on the appropriate role of such evidence in
    supporting the affirmative defense of duress at trial. We
    noted, without approval or disapproval, that Wood was
    permitted to call an expert on BWS, who testified not only on
    BWS generally, but opined that Wood “fitted the profile of a
    battered woman.” Id. at 899.
    Nor did we add clarity in addressing the claims raised by
    the other defendants. Johnson claimed that she should have
    been permitted either to call the same expert as Wood or
    cross-examine her. Id. at 901. We found no abuse of
    discretion in the exclusion of such evidence because the
    expert had never examined Johnson and could only have
    testified as to “a stereotype applied to a case she knew only
    in the most external way.” Id.
    The third defendant, Breck, also contended that the
    district court erred in denying her a jury instruction on duress
    and by precluding her from calling the BWS expert on her
    own behalf. Id. at 902. Unlike the other two defendants who
    had claimed duress, “Breck began to work for [the kingpin]
    without any overt threat on his part, and she continued to
    work for him without such threats being made directly.” Id.
    Rather, Breck’s defense relied solely on her testimony that
    she had once seen his bodyguards strike a woman and had
    “herself heard on numerous occasions from [the kingpin] of
    UNITED STATES V. LOPEZ                    17
    his violent treatment of persons who crossed him.” Id. We
    upheld her conviction. Breck, we reasoned, “had not made
    out a prima facie case of duress because she had made no
    showing that she could not far earlier have escaped [the
    kingpin], as she in fact finally did.” Id. Moreover, the expert
    witness’ “testimony, going to [Breck’s] special subjective
    vulnerability, would not have established the lack of
    opportunity to escape that the defense of duress requires.” Id.
    Ultimately, we remanded all three defendants to the
    district court for resentencing. Even though the defendants
    had not proven their defense of duress at trial, the district
    court could take into account at sentencing their “subjective
    vulnerability” and, as appropriate, “depart downwards on the
    grounds of incomplete duress.” Id. at 903.
    There is language in Johnson that lends support to the
    government’s argument here that BWS evidence is
    incompatible with the duress defense’s objective
    reasonableness standard. See id. at 898. But we decline to
    apply such a broad reading to our brief discussion of the three
    defendants’ evidentiary challenges. Wood was permitted the
    use of an expert to testify at trial as to BWS generally and as
    to Wood’s own profile. Id. at 899. Johnson was denied the
    use of the same expert, in part because she wanted the expert
    to testify as to her motivation, and the expert had never
    examined Johnson. Id. at 901. As to the third defendant,
    Breck, we held only that she lacked the elements of a prima
    facie duress defense because she was not actually threatened
    directly by the drug kingpin and ultimately escaped. Id. at
    902.
    Unfortunately, our Johnson decision never elaborated on
    what it meant for Breck to have had a reasonable opportunity
    18                   UNITED STATES V. LOPEZ
    to escape from the kingpin. We thus have no means of
    discerning what factors led us to conclude that Breck’s duress
    defense was so lacking in evidentiary support that she failed
    to make out a prima facie case, nor can we discern how BWS
    evidence might have influenced those factors. If, for
    instance, Breck had decided not to call the police at the first
    opportunity, then a decision holding that BWS evidence was
    inadmissable in assessing the reasonableness of her decision
    would certainly be relevant to the case before us.
    Unfortunately, Johnson does not supply these answers. We
    must, therefore, conclude that our holding was limited to the
    dearth of duress evidence in Breck’s case. We are unwilling
    to read Johnson as establishing a categorical bar on BWS
    evidence in support of a duress defense at trial; we think that
    reads too much into Johnson. See United States v. Marenghi,
    
    893 F. Supp. 85
    , 93 (D. Me. 1995) (“[T]he admissibility of
    expert testimony during trial in a duress defense was not
    squarely before the appellate court in Johnson”).
    Our conclusion is bolstered by United States v. Homick,
    
    964 F.2d 899
     (9th Cir. 1992), which we decided mere months
    after Johnson.4 There, a woman and her ex-husband were
    tried for wire fraud stemming from her falsified affidavit
    regarding stolen jewelry. 
    964 F.2d at
    901–02. The female
    defendant claimed that she acted under duress from her ex-
    husband, and on appeal, contended “that the district court
    4
    Our conclusion is also consistent with our non-BWS precedent,
    which has allowed consideration of factors unique to the defendant, rather
    than the threatening party, in assessing whether the defendant had a
    reasonable opportunity to escape. See, e.g., Contento-Pachon, 
    723 F.2d at 694
     (holding that it is the jury’s role to “decide whether one in [the
    defendant’s] position might believe that some of the Bogota police were
    paid informants for drug traffickers and that reporting the matter to the
    police did not represent a reasonable opportunity of escape”).
    UNITED STATES V. LOPEZ                    19
    improperly excluded expert testimony regarding battered
    woman syndrome and thereby deprived her of her theory of
    defense.” Id. at 905. We found no error in this exclusion, as
    the wiretapped phone calls between her and her ex-husband
    revealed “[t]here was nothing implicitly or explicitly
    threatening about [their] conversation[s]” and she “readily
    agreed” to write the fraudulent affidavit. Id. at 906. In
    reaching this conclusion, we stated that “[t]he battered
    woman defense is a species of the defense of duress.” Id. at
    905. And, citing to Johnson, “[w]e recognize[d] that the
    unique nature of battered woman syndrome justifies a
    somewhat different approach to the way we have historically
    applied” the duress defense. Id. Homick thus adds little
    clarity to the proper role of BWS evidence at trial except for
    this: It demonstrates that we have not viewed evidence of
    BWS as categorically incompatible with duress. Rather, as
    in Johnson, we rejected the defendant’s claim of duress based
    on the lack of evidence supporting the affirmative defense.
    Here, Lopez testified that Karaca—a convicted felon
    fleeing from the police—threatened to harm her and her
    family if she failed to comply with his demands and that she
    feared that he would carry out these threats if she went to the
    police. Such evidence was more than sufficient to warrant a
    duress instruction, which Lopez received. We must therefore
    address the question left unanswered in our prior decisions:
    what role BWS evidence may play in supporting the
    affirmative defense of duress.
    2
    We do not begin from a blank slate. Because duress is a
    common-law defense, state and federal courts have long
    20                   UNITED STATES V. LOPEZ
    opined on its application and parameters. See Johnson, 
    956 F.2d at 897
     (“The defense of duress is a common law concept
    that federal criminal law has incorporated.”). Tellingly, the
    government has cited to only one jurisdiction that
    categorically bars BWS evidence in the duress context.5 In
    Willis, the Fifth Circuit held that BWS evidence is
    “inherently subjective” and thus incompatible with the duress
    defense’s objective, reasonable-person standard. 
    38 F.3d at 175
    . The court reasoned that
    [s]uch evidence is not addressed to whether a
    person of reasonable firmness would have
    succumbed to the level of coercion present in
    a given set of circumstances. Quite the
    contrary, such evidence is usually consulted to
    explain why this particular defendant
    succumbed when a reasonable person without
    a background of being battered might not
    have.      Specifically, battered woman’s
    syndrome evidence seeks to establish that,
    because of her psychological condition, the
    defendant is unusually susceptible to the
    coercion.
    5
    Curiously, the government also cites United States v. Smith, 
    987 F.2d 888
     (2d Cir. 1993). In that case the district court declined to appoint
    the defendant a psychiatrist “on the ground that testimony as to [the
    defendant’s] unusual susceptibility to coercion was irrelevant and
    inadmissible.” Smith, 
    987 F.2d at 891
    . The Second Circuit held this was
    error: “A psychiatrist might have testified to other issues at trial and
    sentencing, including that [the defendant’s] behavior was not inconsistent
    with his being under duress. . . . Explaining this behavior might have
    bolstered the credibility of his duress claim, which was relevant to the
    jury’s determination.” 
    Id.
    UNITED STATES V. LOPEZ                           21
    
    Id.
     (emphasis added); see also United States v. Dixon, 
    413 F.3d 520
    , 523–24 (5th Cir. 2005) (applying Willis in a case
    involving facts similar to the instant case), aff’d on other
    grounds, 
    548 U.S. 1
     (2006).
    In contrast, in a recent case the D.C. Circuit observed that
    “[m]ost courts that have considered th[is] question—
    especially in recent years—have recognized that expert
    testimony on battered woman syndrome can be relevant to
    prove duress.” United States v. Nwoye, 
    824 F.3d 1129
    , 1136
    (D.C. Cir. 2016) (Kavanaugh, J.). In Nwoye, the D.C. Circuit
    concluded that “expert [BWS] testimony can help a jury
    assess whether a battered woman’s actions were reasonable.”
    
    Id.
     Reasonableness, the court explained, “is not assessed in
    the abstract. Rather, any assessment of the reasonableness of
    a defendant’s actions must take into account the defendant’s
    ‘particular circumstances,’ at least to a certain extent.” 
    Id. at 1137
     (emphasis added).
    Turning first to whether a defendant who suffers from
    BWS can have a well-grounded fear that the threat will be
    carried out against her,6 the court explained that “women in
    6
    The D.C. Circuit describes the duress defense as a two-element
    test: (1) whether the defendant “acted under an unlawful threat of
    imminent death or serious bodily injury” and (2) whether “there was no
    ‘reasonable, legal alternative to committing the crime.’” Nwoye, 824 F.3d
    at 1135 (quoting United States v. Nwoye, 
    663 F.3d 460
    , 462 (D.C. Cir.
    2011)). Because the D.C. Circuit has stated that reasonableness is a
    component of both elements, id. at 1137, we interpret this test as the
    functional equivalent of our own three-part test. Its first element merely
    combines the question of whether the defendant suffered “an immediate
    threat of death or serious bodily injury” and whether she had “a
    well-grounded fear that the threat will be carried out.” Johnson, 
    956 F.2d at 897
    . Moreover, we see no meaningful distinction between whether the
    defendant had a “reasonable opportunity to escape the threatened harm,”
    22                   UNITED STATES V. LOPEZ
    battering relationships are often ‘hypervigilant to cues of
    impending danger and accurately perceive the seriousness of
    the situation before another person who had not been
    repeatedly abused might recognize the danger.’” 
    Id.
    (emphasis added) (quoting Lenore E.A. Walker, Battered
    Women Syndrome and Self-Defense, 6 NOTRE DAME J.L.
    ETHICS & PUB. POL’Y 321, 324 (1992)). Thus, “[r]emarks or
    gestures that may seem harmless to the average observer
    might be reasonably understood to presage imminent and
    severe violence when viewed against the backdrop of the
    batterer’s particular pattern of violence.” Id.; see also
    Marenghi, 
    893 F. Supp. at 95
     (“Providing the jury with
    information of specific incidents of abuse while providing no
    information about how such treatment can, over time,
    establish a dynamic where the threat of abuse hovers over
    every interaction between the individuals, even if such threat
    is not always articulated, would give the jury only half of the
    story.    In effect, [BWS] expert testimony may be
    characterized as explaining how a reasonable person can
    nonetheless be trapped and controlled by another at all times
    even if there is no overt threat of violence at any given
    moment.”).
    As to the separate inquiry of whether a defendant has a
    reasonable opportunity to escape the threatened harm, the
    D.C. Circuit concluded that “battered women face significant
    impediments to leaving abusive relationships.            Most
    importantly, battered women who leave their abusers risk a
    retaliatory escalation in violence against themselves or those
    close to them—sometimes termed ‘separation abuse.’”
    Nwoye, 824 F.3d at 1137–38 (quoting Mary Ann Dutton,
    id., and whether she had a “reasonable, legal alternative to committing the
    crime,” Nwoye, 824 F.3d at 1135.
    UNITED STATES V. LOPEZ                     23
    Validity of “Battered Woman Syndrome” in Criminal Cases
    Involving Battered Women, in DEPARTMENT OF JUSTICE, ET
    AL., THE VALIDITY AND USE OF EVIDENCE CONCERNING
    BATTERING AND ITS EFFECTS IN CRIMINAL TRIALS pt. I, at
    14–15 (1996)). “Expert testimony on those impediments to
    separation can help explain why a battered woman did not
    take advantage of an otherwise reasonable-sounding
    opportunity to avoid committing the alleged crime.” Id. at
    1138 (emphasis added). Indeed, a defendant’s experiences
    may lead her to “reasonably believe[] that reporting [the
    threatening party] to the police (or others) would have been
    unlikely to result in his immediate arrest and would . . .
    therefore place[] her at greater risk in the interim.” Id.
    at 1139.
    As the court in Nwoye observed, the majority of
    courts—federal and state—that have addressed BWS in the
    context of a duress defense have concluded that such
    evidence is relevant and may be admitted. See, e.g., Dando
    v. Yukins, 
    461 F.3d 791
    , 801 (6th Cir. 2006); United States v.
    Ramirez, 
    87 Fed. R. Evid. Serv. 1154
     (D.P.R. 2012); United
    States v. Ceballos, 
    593 F. Supp. 2d 1054
    , 1060–63 (S.D. Iowa
    2009); Marenghi, 
    893 F. Supp. at
    91–97; Commonwealth v.
    Asenjo, 
    82 N.E.3d 966
    , 973–74 (Mass. 2017); Wonnum v.
    State, 
    942 A.2d 569
    , 572–73 (Del. 2007); State v. Williams,
    
    937 P.2d 1052
    , 1058 (Wash. 1997) (en banc). But see United
    States v. Willis, 
    38 F.3d 170
     (5th Cir. 1994); State v. Richter,
    
    424 P.3d 402
     (Ariz. 2018); State v. B.H., 
    870 A.2d 273
     (N.J.
    2005).
    This analysis of BWS as applied to duress also comports
    with the way courts have long viewed self-defense, which is
    similar to duress in that both defenses “require a defendant to
    demonstrate that she acted reasonably in response to a
    24                UNITED STATES V. LOPEZ
    reasonable fear of death or bodily injury.” Marenghi, 
    893 F. Supp. at 95
    ; see Nwoye, 824 F.3d at 1138 (“Our conclusion
    is further supported by the decisions of the vast majority of
    courts that have long held that expert testimony on battered
    woman syndrome can be relevant in the analogous context of
    self-defense.”); Johnson, 
    956 F.2d at 900
     (“The majority of
    state courts that have considered the issue [of BWS] have
    admitted expert testimony as to the syndrome on behalf of a
    woman contending that she acted in self-defense.”); see also
    see State v. Curley, No. 2016-KP-1708, 
    2018 WL 3154627
    ,
    at *8 (La. June 27, 2018); Commonwealth v. Pike, 
    726 N.E.2d 940
    , 948 (Mass. 2000); Boykins v. State, 
    995 P.2d 474
    ,
    476–79 (Nev. 2000); People v. Humphrey, 
    921 P.2d 1
    , 8–9
    (Cal. 1996); People v. Wilson, 
    487 N.W.2d 822
    , 823–24
    (Mich. Ct App. 1992).
    In People v. Humphrey, the California Supreme Court
    concluded that, by admitting BWS evidence in a self-defense
    trial, it was “not changing the standard from objective to
    subjective, or replacing the reasonable ‘person’ standard with
    a reasonable ‘battered woman’ standard.” 921 P.2d at 9.
    Rather, “[t]he jury must consider [a] defendant’s situation
    and knowledge, which makes the evidence relevant, but the
    ultimate question is whether a reasonable person, not a
    reasonable battered woman, would believe in the need to kill
    to prevent imminent harm.” Id. (first emphasis added). As
    with duress, “objective reasonableness” for self-defense
    “must view the situation from the defendant’s perspective.”
    Id. at 8 (emphasis in original). “As violence increases over
    time, and threats gain credibility, a battered person might
    become sensitized and thus able reasonably to discern when
    danger is real and when it is not.” Id. at 9. “The cyclical
    nature of an intimate battering relationship enables a battered
    spouse to become expert at recognizing the warning signs of
    UNITED STATES V. LOPEZ                    25
    an impending assault from her partner—signs frequently
    imperceptible to outsiders.” Id. at 17 (Brown, J., concurring)
    (emphasis added) (quotation marks and citation omitted).
    Thus, “[a]lthough a jury might not find the appearances
    sufficient to provoke a reasonable person’s fear, they might
    conclude otherwise as to a reasonable person’s perception of
    the reality when enlightened by expert testimony on the
    concept of hypervigilance.” Id. (emphasis in original).
    On balance, we are persuaded that expert testimony on
    how BWS can cause individuals to become hypervigilant to
    impending harm does not, as the Fifth Circuit perceives, seek
    to alter the duress defense’s reasonable-person standard. See
    Willis, 
    38 F.3d at 175
    . The question is still whether or not “a
    person of reasonable firmness in [the defendant’s] situation
    would have been unable to resist.” MODEL PENAL CODE
    § 2.09(1) (1985) (emphasis added). We acknowledge,
    however, that the “‘snapshot’ of circumstances” shown to the
    jury is not limited to just those circumstances existing
    immediately prior to the commission of the crime. Marenghi,
    
    893 F. Supp. 94
    . This court has long recognized that a
    defendant’s particular situation includes consideration of past
    experiences. See Johnson, 
    956 F.2d at 898
     (“Fear which
    would be irrational in one set of circumstances may be
    well-grounded if the experience of the defendant with those
    applying the threat is such that the defendant can reasonably
    anticipate being harmed on failure to comply.” (emphasis
    added)).
    Moreover, BWS evidence is compatible with assessing
    whether a defendant had a reasonable opportunity to escape
    from the coercing party. As seen above, this inquiry often
    focuses on why the defendant did not call the police at the
    first opportunity. See, e.g., Kuok, 
    671 F.3d at 949
    ;
    26                UNITED STATES V. LOPEZ
    Contento-Pachon, 
    723 F.2d at 694
    ; see also Nwoye, 824 F.3d
    at 1133. Experts on BWS, however, have explained that:
    The battered woman’s perception of viable
    options for stopping the violence and abuse by
    any means is not only shaped by her own
    prior experience with violence, but also
    influences her future actions in response to
    violence. The perception or understanding of
    whether there are options available that would
    end the violence is based largely on what has
    actually been learned through experience.
    Mary Ann Dutton, Understanding Women’s Responses to
    Domestic Violence: A Redefinition of Battered Woman
    Syndrome, 21 HOFSTRA L. REV. 1191, 1219 (1993). For
    example, a woman may “‘learn[]’ during childhood that the
    police [are] not a viable option to stop the violence even in an
    immediate situation” if she “observed her mother call the
    police on many occasions when her father beat her mother,
    only to hear them say that since the situation was ‘a
    domestic,’ they could not intervene.” Id. at 1220. Indeed, an
    ineffective attempt to seek help will likely amplify a woman’s
    risk of being harmed. See id. at 1119–20; see also Humphrey,
    921 P.2d at 3 (“[M]any battered women remain in the
    relationship because of lack of money, social isolation, lack
    of self-confidence, inadequate police response, and a fear
    (often justified) of reprisals by the batterer.”).
    Because an “assessment of the reasonableness of a
    defendant’s actions must take into account the defendant’s
    ‘particular circumstances,’” Nwoye, 824 F.3d at 1137, a jury
    may consider the defendant’s prior experience with police
    response to abuse in determining whether it was reasonable
    UNITED STATES V. LOPEZ                     27
    for her not to contact them once threatened by the coercing
    party. We perceive no meaningful distinction between a jury
    considering such evidence and assessing whether it was
    reasonable for a defendant not to contact the police due to
    fear either that close family members will be harmed or that
    the police are in league with the coercing party. See, e.g.,
    Kuok, 
    671 F.3d at
    949–50 (“[T]he government’s suggestion
    that [the defendant] should have cooperated with the
    authorities immediately upon landing in the Atlanta airport
    may be unreasonable, given that [the defendant] knew his
    family was still in danger of being jailed by Chinese
    government officials beyond the control of U.S. authorities”);
    Contento-Pachon, 
    723 F.2d at 694
     (“The trier of fact should
    decide whether one in [the defendant’s] position might
    believe that some of the Bogota police were paid informants
    for drug traffickers and that reporting the matter to the police
    did not represent a reasonable opportunity of escape.”); see
    also Nwoye, 824 F.3d at 1132 (“[The defendant] also testified
    that she was afraid to report [the coercing party] to the police
    because [he] had told her that he was a former FBI agent.”).
    Although a defendant may testify to how her experiences
    shaped her perceptions, as the defendant was permitted to do
    in this case, this lay testimony is often insufficient to
    effectively mount a duress defense. “To effectively present
    the situation as perceived by the defendant, and the
    reasonableness of her fear,” a defendant must often
    “overcome stereotyped impressions about women who
    remain in abusive relationships. It is appropriate that the jury
    be given a professional explanation of the battering syndrome
    and its effects on the woman through the use of expert
    testimony.” Humphrey, 921 P.2d at 9; see also Johnson, 
    956 F.2d at 899
     (“Society often misinterprets the survival skills of
    battered women as signs of passivity and weakness coupled
    28                UNITED STATES V. LOPEZ
    with an unwillingness to leave the violent relationship. A
    common misunderstanding is that the battered woman’s
    responses are indicative of weak character.” (citation
    omitted)). We therefore conclude that expert testimony on
    BWS is relevant to supporting a defendant’s argument that
    she had a well-grounded fear that she would be harmed if she
    failed to commit the illegal act demanded of her and that she
    had no reasonable opportunity to avoid committing the crime.
    Beyond directly buttressing the elements of duress, BWS
    is also relevant to the related issue of rehabilitating a
    defendant’s credibility. Humphrey, 921 P.2d at 9; see also
    State v. Hennum, 
    441 N.W.2d 793
    , 798 (Minn. 1989) (citing
    state cases in which “courts have admitted expert testimony
    on” BWS for, inter alia, “the specific purpose of bolstering
    the defendant’s position and lending credibility to her version
    of the facts”). Courts addressing “psychological states
    analogous to BWS, such as rape trauma syndrome and child
    sexual abuse accommodation syndrome, . . . have generally
    held expert opinion admissible for” the purpose of
    “disabus[ing] the jury of some widely held misconceptions
    about [the] victims, so that it may evaluate the evidence free
    of the constraints of popular myths.” Humphrey, 921 P.2d at
    15 (Brown, J., concurring) (quotation marks and citations
    omitted). To this end, “[j]urors faced with testimony from a
    battered woman concerning her abuse and its effects may
    doubt the testimony because they do not believe that a woman
    subject to such abuse would stay with her abuser without
    alerting police or others.” Nwoye, 824 F.3d at 1140. “Expert
    testimony on battered woman syndrome” can help “dispel the
    ordinary lay person’s perception that a woman in a battering
    relationship is free to leave at any time.” Id. (quoting
    Humphrey, 921 P.2d at 9).
    UNITED STATES V. LOPEZ                     29
    Moreover, BWS testimony can provide juries an
    understanding of why victims of abuse sometimes make
    inconsistent statements or act in ways that appear
    counterintuitive to a layperson. For instance, in Arcoren v.
    United States, the key witness recanted at trial her prior grand
    jury testimony that her husband, the defendant, had raped her.
    
    929 F.2d 1235
    , 1238 (8th Cir. 1991). The government then
    moved to introduce expert testimony on BWS. It argued, and
    the Eighth Circuit agreed, that such evidence would aid the
    jury in determining the defendant’s credibility by providing
    the jury an explanation for the victim’s change in testimony.
    
    Id. at 1239
    . “As the [expert] witness told the jury, [BWS] is
    a psychological condition, which leads a female victim of
    physical abuse to accept her beatings because she believes
    that she is responsible for them, and hopes that by accepting
    one more beating, the pattern will stop.” 
    Id. at 1240
    . The
    expert testimony thus “provided the jury with information
    that would help it to determine which” version of the victim’s
    “testimony to credit.” 
    Id.
     Similarly, in the context of a child-
    abuse prosecution, we held that expert testimony on such
    abuse had “significant probative value in that it rehabilitated
    (without vouching for) the victim’s credibility after she was
    cross-examined about the reasons she delayed reporting and
    about the inconsistencies in her testimony.” United States v.
    Bighead, 
    128 F.3d 1329
    , 1331 (9th Cir. 1997). Expert
    testimony on BWS could likewise rehabilitate the testimony
    of a domestic-abuse victim in cases of duress, regardless of
    whether she is the defendant or a government witness.
    With this understanding of the appropriate role of BWS
    evidence in raising the affirmative defense of duress, we turn
    to the expert evidence proffered in this case.
    30                UNITED STATES V. LOPEZ
    3
    Although Lopez’s proffer of Dr. Karp’s proposed
    testimony—before trial, during trial and in her motion for a
    new trial—was fairly cursory, it is evident that the testimony
    would have comported with the permissible uses of BWS
    evidence. Dr. Karp attested that her testimony “would have
    provided the jurors with information about . . . what the
    dynamics of the ‘hypervigilant’ behaviors experienced by
    abused women . . . are in deciding the dangerousness of the
    situation.” If jurors harbored any doubt that Lopez had a
    well-grounded fear that Karaca would harm her and her
    family if she failed to purchase a gun for him, this testimony
    may have helped them understand why she “accurately
    perceive[d] the seriousness of the situation before another
    person who had not been repeatedly abused might recognize
    the danger.” Nwoye, 824 F.3d at 1137 (citation omitted).
    Moreover, Dr. Karp’s testimony would have supported
    Lopez’s contention that she had no reasonable opportunity to
    escape from Karaca. Lopez testified at trial that her
    stepfather beat her, her mother, and her sisters on a near daily
    basis and also sexually assaulted her. The police would often
    “take the report and leave,” and after one of the few occasions
    they arrested her stepfather, “he was out the next day” and
    “broke into the house.” Lopez attributed these experiences to
    why she decided not to call the police after Karaca threatened
    her, explaining that she feared they would not help her and
    that Karaca would discover that she had called them. The
    government attempted to assail this point throughout its
    closing argument, contending that Lopez’s fear “just doesn’t
    make sense” and referring to her explanation as “really
    incredible.” Dr. Karp, however, attested that Lopez’s past
    trauma “may have influenced [Lopez’s] feelings when she did
    UNITED STATES V. LOPEZ                       31
    not seek the help of the police, given her own trauma history
    of being sexually abused by her step-father and the police
    never protecting her.” We, of course, offer no opinion as to
    whether a jury would believe Lopez or, as the government
    argues, find her “really incredible,” but that is the jury’s role.
    Kuok, 
    671 F.3d at 950
    . This proposed testimony would have
    therefore aided the jury in assessing the reasonableness of
    Lopez’s decision to buy Karaca the gun and not call the
    police. See Nwoye, 824 F.3d at 1139 (“[The defendant] may
    have reasonably believed that reporting [the coercing party]
    to the police (or others) would have been unlikely to result in
    his immediate arrest and would have therefore placed her at
    greater risk in the interim. Thus, [her] testimony concerning
    [his] abuse, supplemented by expert testimony on battered
    woman syndrome, would have constituted ‘sufficient
    evidence from which a reasonable jury could find’ for [the
    defendant] on a theory of duress.”).
    Similarly, Dr. Karp’s testimony could have rehabilitated
    Lopez’s credibility in light of the government’s contention
    that Lopez complied with Karaca, not out of fear of him, but
    to keep her “relationship [with him] alive[] [and] to keep her
    contact with Karaca ongoing.” Indeed, the government
    highlighted the fact that, when confronted by her probation
    officer, Lopez referred to Karaca as “my man,” asserting that
    this was why she bought the gun. This is precisely the type of
    behavior that might appear outwardly inconsistent with being
    a victim of domestic violence but can be placed in context
    through expert testimony “as to the dynamics involved in
    Battered Woman Syndrome and why Battered Women
    remain with abusive men.”
    We garner from the district court’s series of oral rulings
    on the admissibility of Dr. Karp’s testimony that the court
    32                    UNITED STATES V. LOPEZ
    perceived the question of admitting the BWS evidence as
    “close,” but ultimately concluded that it was categorically
    irrelevant to Lopez’s duress defense. In light of the foregoing
    discussion, this was an error of law, which constitutes an
    abuse of discretion. United States v. Finley, 
    301 F.3d 1000
    ,
    1007 (9th Cir. 2002). “A non-constitutional error requires
    reversal unless there is a ‘fair assurance’ of harmlessness, or
    stated another way, unless ‘it is more probable than not that
    the error did not materially affect the verdict.’”7 United
    States v. Torres, 
    794 F.3d 1053
    , 1063 (9th Cir. 2015)
    (quoting United States v. Seschillie, 
    310 F.3d 1208
    , 1214 (9th
    Cir. 2002)). The government argues that the exclusion of Dr.
    Karp’s testimony was harmless, contending that it would
    have been cumulative of Lopez’s own testimony about her
    past abuse and its effect on her decisions.8 But as discussed
    7
    Lopez argues that the exclusion of Dr. Karp’s testimony prevented
    her from raising a complete defense and thus amounted to constitutional
    error, which requires “the Government [to] convince[] us that the error
    was harmless beyond a reasonable doubt.” United States v. Stever, 
    603 F.3d 747
    , 757 (9th Cir. 2010). Because we find sufficient prejudice under
    the less onerous standard for non-constitutional errors, we need not reach
    this issue.
    8
    The government also briefly argues that the testimony should be
    excluded under Federal Rule of Evidence 403 as unfairly prejudicial
    because it would “likely . . . elicit a sympathetic emotional response in the
    jury that would have affected their verdict.” We have cautioned, however,
    “that the exclusion of evidence offered by the defendant in a criminal
    prosecution under Rule 403 is ‘an extraordinary remedy to be used
    sparingly.’” United States v. Haischer, 
    780 F.3d 1277
    , 1281 (9th Cir.
    2015) (quoting United States v. Mende, 
    43 F.3d 1298
    , 1302 (9th Cir.
    1995)). Lopez had already testified to the physical and sexual abuse
    inflicted by her stepfather. The proposed expert testimony would have
    merely explained how this abuse affected her interactions with Karaca and
    the police. We perceive no undue prejudice. In any event, that is a matter
    for the district court to decide.
    UNITED STATES V. LOPEZ                      33
    above, expert testimony on BWS serves an important role in
    helping dispel many of the misconceptions regarding women
    in abusive relationships. Such evidence was vital to Lopez’s
    defense, which hinged on persuading the jury that she acted
    only out of an objectively reasonable fear. We will therefore
    vacate Lopez’s conviction on all counts and remand for a new
    trial.
    ***
    We hold that expert testimony on BWS is not
    categorically excludable and may be relevant to a defense of
    duress. We understand that our opinion leaves open many
    questions concerning the proper scope of an expert’s
    testimony on BWS. These questions will have to be
    addressed in the first instance by the district court.
    B
    Finally, we turn to Lopez’s argument that the district
    court erred in excluding the tape of her complete interview
    with the ATF agents as inadmissable hearsay. Lopez moved
    the district court several times before and during trial to admit
    the entire interview, raising numerous theories of
    admissibility. In her motion for a new trial, Lopez again
    argued that the entire taped interview should have been
    admitted. She contended that the ATF agents’ statements
    were non-hearsay because she offered them to show their
    effect on her as the listener rather than for the truth of the
    matter asserted. For instance, one of the agents told Lopez
    during the interview that Karaca “is not gonna touch you. He
    has no power in here. He is gonna be in jail or dead within a
    week.” Lopez argued, as she does on appeal, that such
    statements would not have been offered to prove that Karaca
    34                UNITED STATES V. LOPEZ
    could not harm her in jail, but rather to show that the
    statements had the effect of making her feel safe, which
    therefore led to her telling the agents about Karaca’s threats.
    Lopez contended that this evidence would have helped her
    counter the government’s argument at trial that the impact of
    spending a night in jail led to her fabricating a story of acting
    under duress the very next day. In a brief oral ruling, the
    court denied the motion for a new trial, merely commenting
    as to this issue that the statements were “self-serving
    hearsay.”
    A district court’s evidentiary rulings are reviewed for
    abuse of discretion, United States v. Beydler, 
    120 F.3d 985
    ,
    987 (9th Cir. 1997), as is its denial of a motion for a new trial,
    United States v. King, 
    660 F.3d 1071
    , 1076 (9th Cir. 2011).
    “As a general rule, a party is prohibited from introducing a
    statement made by an out-of-court declarant when it is
    offered at trial to prove the truth of the matter asserted.”
    Torres, 794 F.3d at 1059. Accordingly, an out-of-court
    statement is not hearsay if offered for any purpose other than
    the truth of whatever the statement asserts. See United States
    v. Sanchez-Lopez, 
    879 F.2d 541
    , 554 (9th Cir. 1989). One
    common application of this principle is admitting a
    declarant’s out-of-court statement for the purpose of
    establishing what effect it had on the listener. See, e.g.,
    United States v. Payne, 
    944 F.2d 1458
    , 1472 (9th Cir. 1991);
    2 MCCORMICK ON EVIDENCE § 249 (7th ed. 2016) (providing
    examples).
    Lopez is correct that the ATF agents’ statements would be
    non-hearsay if considered only in the context of assessing
    their impact on Lopez—i.e., convincing her that it was safe
    to speak to the agents about Karaca. This conclusion is
    underscored by the fact that there would be little relevance to
    UNITED STATES V. LOPEZ                             35
    the truth of the agents’ statements that Karaca could not harm
    Lopez while she was in jail. In contrast, the non-hearsay
    application of these statements would be relevant to rebutting
    the government’s argument that Lopez’s night in jail
    convinced her to fabricate her duress story.
    Nonetheless, the district court did not err in excluding this
    evidence because Lopez consistently sought to introduce the
    video of the entire interview. This evidence would have
    undoubtedly consisted nearly exclusively of hearsay
    statements, including those made by Lopez.9 There was no
    abuse of discretion.
    III. CONCLUSION
    The district court abused its discretion in categorically
    excluding Lopez’s expert witness on Battered Woman
    Syndrome. Because we find that this error prejudiced her
    defense, we VACATE her conviction on all counts and
    REMAND for a new trial.
    9
    Lopez has not argued on appeal that her statements would be non-
    hearsay (e.g., under the exclusion for prior consistent statements) or would
    fall under a hearsay exception.
    36                UNITED STATES V. LOPEZ
    RAWLINSON, Circuit Judge, dissenting:
    I respectfully dissent. Although I absolutely support the
    use of expert testimony on Battered Woman Syndrome in
    appropriate circumstances, I cannot say that the able district
    court judge in this case abused his discretion in determining
    that the testimony was not admissible in the context of
    establishing a duress defense, as opposed to the usual context
    of its admission - to establish self-defense.
    We start from the premise that we owe deference to the
    district court’s evidentiary rulings, particularly in the realm
    of expert testimony. See Saravia v. Sessions, 
    905 F.3d 1137
    ,
    1141 (9th Cir. 2018) (“Abuse-of-discretion review is highly
    deferential to the district court. . . .) (citation omitted); see
    also Skidmore v. Led Zeppelin, 
    905 F.3d 1116
    , 1136 (9th Cir.
    2018) (“District courts have broad discretion in making
    evidentiary rulings, including whether to allow expert
    testimony. . . .) (citation and internal quotation marks
    omitted).
    A district court abuses its discretion if it commits an error
    of law or “reaches a result that is illogical, implausible, or
    without support in the inferences that may be drawn from the
    record.” Kode v. Carlson, 
    596 F.3d 608
    , 612 (9th Cir. 2010)
    (citation omitted); see also Mujica v. Airscan, Inc., 
    771 F.3d 580
    , 589 (9th Cir. 2017) (same). If the district court commits
    no error of law “[t]he abuse of discretion standard requires us
    to uphold a district court determination that falls within a
    broad range of permissible conclusions.” Kode, 
    596 F.3d at 612
     (citation omitted). In my view, the district court’s
    decision to exclude the evidence was based on such a
    “permissible conclusion” that the evidence was inadmissible.
    
    Id.
    UNITED STATES V. LOPEZ                     37
    The proposed testimony from Dr. Cheryl Karp focused on
    the defendant’s history of having been “sexually abused by
    her step-father and the police never protecting her.”
    However, our precedent has not characterized evidence of
    this nature as relevant to a duress defense.
    In United States v. Homick, 
    964 F.2d 899
    , 905 (9th Cir.
    1992), we recognized that the battered woman defense “is a
    species of the defense of duress.” In that case, the defendant
    sought to have expert testimony admitted to establish that her
    ex-husband, who was charged with the murder of the victims,
    coerced her into participating in the charged offenses through
    “his complete domination over her.” 
    Id. at 902, 905
    . We
    ultimately concluded that any error in excluding the proffered
    expert testimony was harmless because the two recorded
    telephone conversations between the defendant and her ex-
    husband reflected ready acquiescence, with “nothing
    implicitly or explicitly threatening about either conversation.”
    
    Id. at 906
    .
    Notably, in Homick we addressed battered woman
    syndrome in the context of a defense tethered to the co-
    perpetrator, who was alleged to be the duressor. See 
    id. at 902, 905
    . Similarly, in United States v. Johnson, 
    956 F.2d 894
     (9th Cir. 1992), superseded on other grounds in Martinez
    v. Martinez, 
    369 F.3d 1076
    , 1089 (9th Cir. 2004), we
    considered the duress defense in the context of women
    convicted of drug offenses, who asserted that the drug
    kingpin for whom they worked abused and “psychologically
    threatened” them. 
    Id.
     at 901–02. We phrased the issue in the
    following manner: “The question, relevant to the defense of
    duress in the cases before us, is whether a special
    vulnerability to fear—a vulnerability not produced by those
    persons causing the defendant’s criminal action—may be
    38                UNITED STATES V. LOPEZ
    taken into account.” Id. at 898. We resolved the issue by
    answering the question in the negative: “As a defense to a
    charge of criminal conduct, such subjective vulnerability has
    not been admitted.” Id. (emphasis added).
    In other words, we held in Johnson that evidence of
    subjective vulnerability “not produced by” the named
    duressor is not admissible to establish the affirmative defense
    of duress. Id. Rather, such evidence may be used at
    sentencing. See id. (“[A] purely subjective element that
    cannot be taken into account in determining criminal liability
    may be taken into account in sentencing. . . .”) (citations
    omitted).
    The real takeaway from our holding in Johnson is that the
    expert testimony addressing Battered Woman Syndrome must
    address vulnerability “produced by” the named duressor. Id.
    And that holding, in my view, solidifies why the district court
    in this case acted within its discretion by excluding the
    proffered expert testimony. As discussed, the record reflects
    only that the testimony would focus on the defendant’s
    history of having been “sexually abused by her step-father
    and the police never protecting her.” Because her step-father
    was not the named duressor for the crime for which she was
    on trial, our reasoning in Johnson rendered the district court’s
    exclusion of the proffered evidence a “permissible
    conclusion” under our precedent. Kode, 
    596 F.3d at 612
    .
    The majority seeks to avoid our holding in Johnson by
    expressing its “unwilling[ness] to read Johnson as
    establishing a categorical bar on [Battered Woman
    Syndrome] evidence in support of a duress defense at trial.”
    Majority Opinion, p.18. But Johnson does not purport to
    establish a categorical bar on Battered Woman Syndrome
    UNITED STATES V. LOPEZ                           39
    evidence. Rather, it limits admissibility of that evidence to
    circumstances where the individual producing the
    vulnerability to duress is the same as the named duressor for
    the offense being defended. See Johnson, 
    956 F.2d at 898
    .
    And as a three-judge panel, we are bound to follow the
    precedent of our court, no matter how unwilling we may be
    to hew to our past decisions, or how unpalatable the result
    may be. See Lair v. Bullock, 
    798 F.3d 736
    , 747 (9th Cir.
    2015), as amended (“[W]e are bound by a prior three-judge
    panel’s published opinions . . .”) (citing Miller v. Gammie,
    
    335 F.3d 889
    , 892–93 (9th Cir. 2003 (en banc)).
    The majority also relies on Homick to bolster its disregard
    of our analysis in Johnson. See Majority Opinion, pp. 18–19,
    39. But as the majority must acknowledge, “Homick . . . adds
    little clarity to the proper role of [Battered Woman
    Syndrome] evidence at trial . . .” Majority Opinion, p.19.
    Indeed, other than a cf. citation to Johnson, the panel in
    Homick did not grapple at all with the analysis in Johnson.
    Rather, the Homick panel resolved the issue by noting that the
    facts in Homick did not “fall within the scope of any
    reasonable approach to the battered woman defense, no
    matter how we modify the traditional duress standards.” 
    964 F.2d at
    905–906 (emphasis added). Nevertheless, it is notable
    that the Homick case fit within the parameters of the Johnson
    analysis: a battered woman defense tethered to the alleged
    duressor. See Homick, 
    964 F.2d at 902, 905
    .
    The only other circuit to substantively address this issue
    is the Fifth Circuit.1 In United States v. Willis, 
    38 F.3d 170
    ,
    1
    The majority opinion cites to a case from the D.C. Circuit, United
    States v. Nwoye, 
    824 F.3d 1129
     (D.C. Cir. 2016). However, that case
    addressed the issue in the context of a claim of ineffective assistance of
    40                   UNITED STATES V. LOPEZ
    176 (5th Cir. 1994), the Court relied on our Johnson decision
    to hold that subjective evidence of vulnerability is irrelevant
    to the duress defense in determining criminal liability.
    Admittedly, the Fifth Circuit did not acknowledge our
    explanation that the evidence attesting to subjective
    vulnerability is only subjective when the “vulnerability is not
    produced by those persons causing the defendant’s criminal
    action.” Johnson, 
    956 F.2d at 898
    . Nevertheless, the analysis
    is consistent with Johnson because the Fifth Circuit similarly
    focused on the irrelevance of subjective evidence in meeting
    the objective standard required to establish a duress defense.
    See Willis, 
    38 F.3d at 175
    .
    The expert testimony proffered by the defendant in this
    case hinged on the childhood abuse suffered by the defendant
    at the hands of her step-father. In an affidavit, Dr. Karp
    described how she would have testified:
    My testimony would have provided the
    jurors with information about the cycle of
    violence, how battered women behave when
    under duress, and what the dynamics of the
    “hyper-vigilant” behaviors experienced by
    abused women, as part of the dynamics of
    PTSD, are in deciding the dangerousness of
    the situation.
    counsel, and says nothing more than that Battered Woman Syndrome
    evidence “would have entitled [the defendant] to a jury instruction on
    duress.” Id. at 1135. Nothing about that statement is inconsistent with our
    analysis in Johnson, especially considering that the batterer and the
    duressor were one and the same in Nwoye. See id. at 1131.
    UNITED STATES V. LOPEZ                    41
    My testimony would also have given the
    jury an opportunity to hear from an expert on
    Trauma and how that may have influenced
    [defendant’s] feelings when she did not seek
    the help of the police, given her own trauma
    history of being sexually abused by her step-
    father and the police never protecting her.
    [Defendant] felt they would not protect her or
    believe her, given her prior childhood history
    of trauma and never being “heard” or
    “protected” by law enforcement. The jury
    should have been given an explanation by an
    expert to understand how [Defendant’s]
    childhood abuse influenced her decision-
    making.
    It is enlightening to consider what the expert did say in
    her affidavit and what she did not say. She did say that the
    source of Defendant’s PTSD was her step-father. She did not
    say that the source of her PTSD was the named oppressor. In
    fact, the named oppressor was not mentioned once in the
    expert’s affidavit. She did pinpoint the time of the trauma as
    Defendant’s childhood. She did not point to any trauma
    during adulthood. Clearly, the focus of the expert was the
    defendant’s childhood, specifically the sexual abuse inflicted
    upon the defendant when she was a child. This is precisely
    the type of “subjective vulnerability” evidence that Johnson
    held was not relevant to a duress offense. See 
    956 F.2d at 898
    .
    I am not persuaded by the cases cited by the majority,
    particularly in view of the binding precedent in this circuit
    that supports the decision of the district court.
    42                UNITED STATES V. LOPEZ
    In Dando v. Yukins, 
    461 F.3d 791
     (6th Cir. 2006), the
    admissibility of similar evidence was decided in the context
    of a claim of ineffective assistance of counsel, see 
    id. at 798
    .
    The Sixth Circuit concluded that defense counsel “failed . . .
    to adequately investigate the availability of a duress defense
    and the related possibility that [the defendant] suffered from
    Battered Women’s Syndrome.” 
    Id.
     However, this Sixth
    Circuit case actually fits within the holding of Johnson,
    inasmuch as the defendant in Dando asserted that her co-
    perpetrator and duressor were one and the same. See id.; see
    also Johnson, 
    956 F.2d at 898
     (explaining that the proffered
    expert testimony must address vulnerability “produced by”
    the duressor to be relevant). In any event, the Sixth Circuit
    expressly noted that the issue of allowing evidence of
    Battered Woman Syndrome to establish a duress defense had
    not been “addresse[d] either way” under Michigan law. See
    Dando, 
    461 F.3d at 801
    . This case absolutely does not
    support a conclusion that the district court in our case abused
    its discretion in disallowing the proffered testimony.
    Similarly, the non-binding district court case of United States
    v. Ramirez, No. 10-344 (PG), 
    2012 WL 733973
     at *1
    involved a co-perpetrator who was also the named duressor,
    as did the non-binding cases of United States v. Ceballos, 
    593 F. Supp. 2d 1054
    , 1060–63 (S.D. Iowa 2009); and United
    States v. Marenghi, 
    893 F. Supp. 85
    , 97 (D. Maine 1995).
    The non-binding state court cases are also singularly
    unpersuasive because they rely upon state statutes specifically
    addressing the admissibility of evidence establishing Battered
    Woman Syndrome. See Commonwealth v. Asenjo, 
    82 N.E.3d 966
    , 973 (Mass. 2017) (“G.L.C. 233 § 23F, provides the
    defendant the statutory right to present [evidence of Battered
    Woman Syndrome]”); see also Wonnum v. State, 
    942 A.2d 569
    , 573 (Del. 2007) (referencing Del. Code §§ 303 and 304);
    UNITED STATES V. LOPEZ                    43
    State v. Williams, 
    937 P.2d 1052
    , 1058 (Wash. 1997) (en
    banc) (involving a statutory duress defense and a co-
    perpetrator who was also the named duressor). Importantly,
    the Supreme Court of Arizona, the state where Lopez
    committed her crime, has recently ruled that similar expert
    testimony is not admissible under Arizona law. See State v.
    Richter, 
    424 P.3d 402
    , 404 (Ariz. 2018).
    In sum, none of the non-binding cases relied upon by the
    majority, singly or in combination, are sufficiently persuasive
    that the district court was compelled to admit the proffered
    expert testimony. This is especially true considering that the
    district court’s decision fit squarely within our binding
    precedent, as the proffered testimony was not linked by the
    expert to the asserted duressor. See Johnson, 
    956 F.2d at 898
    (explaining that the proffered expert testimony must address
    vulnerabilities that are “produced by” the duressor). And the
    district court’s decision was consistent with precedent from
    the highest court in the state where the crime was committed.
    See Richter, 424 P.3d at 404.
    Under the deferential abuse of discretion standard of
    review, it cannot be fairly said that the district court
    committed an error of law, because its decision did not run
    afoul of any binding precedent, and the non-binding
    precedent relied on by the majority was singularly
    unpersuasive. Indeed, the district court’s decision was
    actually consistent with Ninth Circuit precedent and Arizona
    precedent. Largely for the same reason, the district court’s
    decision was not “illogical, implausible, or without support in
    the inferences that may be drawn from the record.” Kode,
    
    596 F.3d at 612
    . Rather the district court’s decision fell
    “within a broad range of permissible conclusions.” 
    Id.
     I
    would affirm the judgment of the district court.