United States v. Justin Williams ( 2016 )


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  •                                                           NOT PRECEDENTIAL
    UNITED STATES COURT OF APPEALS
    FOR THE THIRD CIRCUIT
    ______________
    No. 13-4700
    ______________
    UNITED STATES OF AMERICA
    v.
    JUSTIN WILLIAMS,
    a/k/a NEW YORK ICE,
    a/k/a PIMP JUICE
    Justin Williams,
    Appellant
    ______________
    On Appeal from the United States District Court
    for the Eastern District of Pennsylvania
    (D.C. Crim. No. 2-13-cr-00014-001)
    Honorable J. Curtis Joyner, District Judge
    ______________
    Argued October 5, 2016
    BEFORE: SHWARTZ, GREENBERG, and ROTH, Circuit Judges
    (Opinion Filed: December 16, 2016)
    ______________
    Zane David Memeger
    Bernadette McKeon
    Michelle L. Morgan          (ARGUED)
    Office of United States Attorney
    615 Chestnut St., Suite 1250
    Philadelphia, PA 19106
    Counsel for Appellee
    Richard Coughlin
    Office of Federal Public Defender
    800-840 Cooper Street
    Suite 350
    Camden, NJ 08102
    Alison Brill                (ARGUED)
    Office of Federal Public Defender
    22 South Clinton Avenue
    Station Plaza #4, Fourth Floor
    Trenton, NJ 08609
    Counsel for Appellant
    ______________
    OPINION*
    ______________
    GREENBERG, Circuit Judge.
    I.     INTRODUCTION
    A jury found defendant-appellant Justin Williams guilty of two counts of sex
    trafficking by force, fraud, or coercion under 
    18 U.S.C. § 1591
     arising out of his role as a
    pimp for two women. In relevant part, that statute criminalized at the time of the offenses
    an individual’s participation in sex trafficking “knowing, or in reckless disregard of the
    fact, that means of force, threats of force, fraud, coercion . . . , or any combination of such
    means will be used to cause the person to engage in a commercial sex act.” 
    18 U.S.C. § 1591
    (a). The jury also convicted Williams of one count of witness tampering pursuant
    to 
    18 U.S.C. § 1512
     for sending a letter to one of the sex trafficking victims directing her
    ____________________
    *This disposition is not an opinion of the full court and pursuant to I.O.P. 5.7
    does not constitute binding precedent.
    2
    to recant her statements to the government about the case.
    Williams appeals from his convictions claiming that there were four errors at his
    trial entitling him to a reversal on this appeal. First, he argues that the jury instructions
    erroneously failed to include the causation element of the sex trafficking offenses linking
    the sexual conduct to his use of force. In this regard, he contends that a special verdict
    form that the District Court supplied to the jury minimized the statute’s focus on that
    element of the offenses and thereby compounded the error. Second, he challenges the
    sufficiency of the evidence presented at trial. Third, he claims that the District Court
    deprived him of his constitutional right to a complete defense by excluding evidence of a
    victim’s prior acts of prostitution pursuant to Federal Rule of Evidence 412. Fourth, he
    asserts that the Court committed plain error by not sua sponte giving the jury an
    affirmative defense instruction on the witness tampering charge that would have shielded
    him from conviction if, by lawful means, he encouraged a witness to testify truthfully.
    We will affirm the convictions for the following reasons.
    II. JURISDICTION
    The District Court had jurisdiction in this case pursuant to 
    18 U.S.C. § 3231
    .
    Following the jury trial and subsequent timely appeal, we have jurisdiction under 
    28 U.S.C. § 1291
    .
    III. BACKGROUND
    A. Procedural History
    3
    On January 10, 2013, a grand jury in the Eastern District of Pennsylvania indicted
    Williams on two counts of sex trafficking of two women, Talia and Erika, by force,
    fraud, or coercion in violation of 
    18 U.S.C. § 1591.1
     App. at 10. In May 2013, during
    Williams’s incarceration, he sent a letter to Erika professing his love for her and told her
    to “call the lawyer[,] take back the statement and he’ll protect u [sic] from the feds.” 
    Id. at 812
    . He additionally wrote that “[Talia] & you are their case.” 
    Id.
     This letter
    prompted the grand jury to issue a superseding indictment adding one count of witness
    tampering pursuant to 
    18 U.S.C. § 1512
     to the two counts of sex trafficking. 
    Id. at 753
    .
    Before the trial, Williams unsuccessfully moved in limine for an order providing
    that evidence of Erika’s prior commercial sex activity would be admitted at the trial
    pursuant to an exception to the basic rule in Fed. R. Evid. 412 which excludes specified
    evidence of a person’s prior sexual activity. At the conclusion of the trial the jury found
    Williams guilty on all three counts of the indictment. Both prior to and after the jury
    returned its verdict, Williams unsuccessfully moved for a judgment of acquittal.
    On January 21, 2015, the District Court sentenced Williams to a 360-month
    custodial term on each of Counts 1 and 2 and a 240-month custodial term on Count 3,
    with all terms running concurrently. 
    Id. at 718
    . The sentence was within the advisory
    guideline range and Williams does not challenge it on this appeal. 
    Id.
     The Court also
    imposed a 10-year supervised release term to follow execution of the custodial terms and
    ordered Williams to pay restitution to Talia and Erika and a special assessment. 
    Id. at 719, 722, 738-39
    . Williams timely filed a notice of appeal.
    1
    Throughout this opinion, we will refer to the women only by their first names.
    4
    B. Statement of the Facts as Presented at the Trial
    At trial, the government presented evidence that Williams acted as a pimp for a
    number of women, a contention that Williams admitted. Three women—Talia, Erika,
    and a woman named Ivy whom Williams also controlled—testified about their
    interactions with Williams as they engaged in commercial sex acts.2
    Erika met Williams at a casino in March 2010 and found him attractive. 
    Id. at 284
    . She had been a prostitute for 12 years, and she testified that when she met Williams
    she wanted “to pay him” and “be with him.” 
    Id. at 286
    . Erika testified that she worked
    voluntarily for Williams until her arrest in May 2012. 
    Id. at 285-87
    .
    Talia also met Williams at a casino. She had moved to Philadelphia in July 2010
    to live with her godfather and to attend a community college as an “opportunity to start
    over” after her mother found out that she had been dancing at a club in Atlanta. 
    Id. at 123
    . But she started dancing again in Philadelphia, and in November 2011, when she
    was 20 years old, her godfather required her to leave his house. 
    Id. at 126-27
    . A few
    days later, she met Williams at a casino. 
    Id. at 127
    . She testified that he impressed her
    and she made the personal choice to leave with him. 
    Id. at 125, 181-82
    .
    After Talia travelled with Williams to New York and met two other women who
    also were working for Williams as prostitutes, he convinced her to do so as well. 
    Id. at 129-31
    . When she originally considered his proposal, she “burst[] into tears.” Williams,
    however, consoled her and “tried to make it seem like it was okay.” 
    Id. at 131
    . Talia
    2
    We will focus on Talia’s and Erika’s testimony, as they were the victims listed in
    Counts 1 and 2 of the indictment, and we cite Ivy’s testimony only insofar as it concerns
    those two counts.
    5
    claimed that she never previously had been a prostitute. 
    Id.
     But she had heard Williams
    hit Erika, and she testified, “I didn’t feel like I had many options but to do what he said.”
    
    Id.
     At that time, she provided Facebook photos of herself for use in internet
    advertisements. 
    Id. at 183
    . Talia stated that she did not abandon her situation or call her
    mother for a variety of reasons: she was somewhere she never had been before; she did
    not know the people around her; she had been forced to leave someone’s home for the
    second time and did not know where to go or what to do; she felt ashamed; and she did
    not want to tell her mother in Atlanta “like a thousand miles away” that she was in her
    situation. 
    Id. at 132
    . She “just felt stuck.” 
    Id.
     She testified that she “didn’t feel fully
    that it was [her] choice at the time” that she made the decision to become a prostitute. 
    Id. at 191
    .
    Talia worked for Williams for two or three months. 
    Id. at 132
    . During that time,
    Williams took her and other women to a number of places in New York, Pennsylvania,
    New Jersey, Virginia, and Washington, D.C. so that they could work as prostitutes. 
    Id. at 133-34
    . In Philadelphia they stayed in a crack house, which, at least at the outset, was in
    a filthy condition. 
    Id. at 136
    . The women found clients through postings on Backpage, a
    website popular for solicitation, and by walking the streets. 
    Id. at 135
    . Talia often
    created website advertisements and listed her own phone number on them. 
    Id. at 138-42
    .
    Erika and she purchased prepaid cards with which to buy the advertisements. 
    Id. at 144
    .
    When Talia received a call responding to an advertisement, she would tell another
    woman whom Williams controlled that there was a potential “date” on the phone. 
    Id. at 188
    . Talia averaged 5-10 “dates” with clients each day, while Erika had 1-10 per day,
    6
    and Ivy averaged 8-9 “dates” per day. 
    Id. at 145, 268, 353
    . Talia testified that Williams
    would be in close proximity during these “dates” and stay with them all day, although
    Erika denied that he did so. 
    Id. at 133, 148, 312
    .
    Talia, Erika, and Ivy explained Williams’s rules. 
    Id. at 132-33, 273, 352-53
    .
    Talia and Erika originally had a quota of $1000 per day, which Williams reduced to $700
    or $750. 
    Id. at 147, 273
    . Williams set Ivy’s quota at about $500. 
    Id. at 353
    . Ivy stated
    that she was told that she could accept only certain prices for her services and Williams
    directed her not to get into a car with younger men. 
    Id. at 352
    . All three women testified
    that Williams required them to give him the money that they received from prostitution,
    although Talia stated that Williams allowed them to keep some money for food purchases
    and she acknowledged that he purchased other items for her at times. 
    Id. at 133, 145-46, 210, 269
    . When they were on “dates” with clients, they could not stay for longer than 15-
    20 minutes without notifying Williams that they would receive additional payment for
    their longer stay. 
    Id. at 133
    ; see 
    id. at 352-53
    . If they failed to update Williams, Talia
    testified that he would call to ask where they were and what they were doing. 
    Id. at 146
    .
    The women needed to shower immediately upon return from a “date” and “wash the
    streets off.” 
    Id. at 133
    . The longest time that Erika worked continuously was around 18
    hours, while Ivy’s longest period of working without a break was 15 hours. 
    Id. at 269, 354
    . But Talia once worked 25 hours straight. 
    Id. at 147
    . Williams did not give them
    regular time off from work, but he would not send them out to work if he was in a good
    mood. 
    Id. at 147
    .
    7
    Talia and Erika witnessed Williams’s violent behavior towards the women who
    worked for him. Talia testified that when she first was with Williams she heard him hit
    Erika and that she saw Williams hit Erika at least once every two weeks thereafter. 
    Id. at 150
    . Talia stated that Williams would punch Erika in the face and middle of the chest
    with a closed fist when she “talked back.” 
    Id. at 150-51
    . Erika also testified that she saw
    Williams engaging in other acts of violence. 
    Id. at 255-56
    . She testified that she watched
    him slap two different women. 
    Id. at 255
    . Erika also observed Williams slap, punch, and
    kick another woman under his control named Stevi. 
    Id. at 258
    . He sent Talia and Erika
    out to work the streets after beating Stevi in front of them. 
    Id.
    The women detailed Williams’s violence against them. Talia testified about a time
    when she made a comment to one of Williams’s associates and Williams interjected that
    he would “punch the glasses like off of [her] face for talking to him.” 
    Id. at 159
    . Ivy
    acknowledged that Williams punched her in the stomach in front of Talia. 
    Id. at 357
    .
    Talia claimed that Williams used violence and threats as “his main mode of, you know,
    trying to keep [them] together, doing what he told [them] to do.” 
    Id. at 158
    .
    Of all the women under his control, Williams most frequently was violent toward
    Erika, 
    id. at 259
    . In this regard, Ivy and Erika agreed that Erika bore the brunt of
    Williams’s violence. 
    Id. at 259, 363
    . Erika explained that Williams sometimes was
    violent toward her on a weekly basis, but that at other times he could go for months
    without subjecting her to violent acts. 
    Id. at 250
    . Williams would slap her, punch her in
    the ribs and face with his fist, kick her, and shove her, sometimes in front of the other
    women working for him. 
    Id. at 250-54
    . Ivy watched Williams punch Erika in the face
    8
    and stomach and grab her by her neck and head. 
    Id. at 350-51
    . She said that she
    witnessed that type of violence about ten times, and that she noticed that Erika had
    swollen lips, a black eye, and bruises, and was missing teeth multiple times after those
    incidents. 
    Id. at 362
    . At times, Williams would send Erika out to engage in prostitution
    after those beatings. 
    Id. at 250-54, 363
    . Erika’s mother testified that Williams told her
    that he had to “physically beat [Erika] or hit her to get her straight” because she almost
    had “gotten them both in trouble.” Furthermore, Erika’s mother detailed the black eyes
    and bruises she had seen on Erika’s body while Erika was dating Williams. 
    Id. at 71-72
    .
    Another time, he gave Erika a deep cut on her arm with hair clippers because he
    attributed the incarceration of a friend of his to her actions. 
    Id. at 252-53
    . In a recorded
    call offered as evidence, Williams told Erika, “I got to come over there and put a slave
    trader over top of you to do anything.” 
    Id. at 275
    . Erika testified that this meant he was
    going to send one of his friends to be with her. 
    Id.
    Talia described a time when Williams acted violently toward Erika, Talia, and
    Stevi after the women told Williams about a prospective client who was acting strangely.
    
    Id. at 152
    . They mentioned to Williams that the prospective client was “acting like kind
    of boyfriend-ish.” 
    Id.
     In response Williams lined up Erika and Talia next to each other
    in a hallway and yelled at them, asking about the man. 
    Id.
     Williams hit Erika, hit Talia
    in the face three times, and pushed Talia against the wall. 
    Id. at 153-56
    . He brought the
    women into a downstairs room, where he punched Stevi in the face and body, stomped on
    her, kicked her, and pulled her by the hair to throw her head into the edge of the door. 
    Id.
    Williams then hit Erika right below the sternum, and she fell to the ground gasping for
    9
    breath. 
    Id. at 153
    . This incident lasted 10-15 minutes, and immediately afterward
    Williams sent the women back outside to continue working on the streets. 
    Id. at 154
    .
    Ivy and Erika detailed another incident in which Williams pulled a phone cord out
    of the wall and used it to whip Ivy while she was wearing a towel. 
    Id. at 256, 358
    . Erika
    was in the room at that time but she turned her head to avoid seeing it happen. 
    Id. at 256
    .
    She heard the sound of the cord hitting Ivy, heard Ivy screaming, and witnessed Ivy
    crying afterward. 
    Id. at 257
    . Ivy asserted that Williams hit her with the cord because she
    had been kidnapped and when she returned he told her that she would “have to pay for
    it.” 
    Id. at 358
    . Ivy testified that a few days after she returned from the kidnapping, he
    told her that “he would beat [her] with a phone cord, and that’s exactly what he did.” 
    Id.
    Ivy showed the jury many marks on her body from the incident. 
    Id. at 361
    . One of those
    marks was five inches long, while another on her torso had been “split open” and looked
    as if it was still swollen. 
    Id. at 361
    . Erika denied during her second day of testimony that
    this incident had happened. 
    Id. at 314
    .
    Williams was incarcerated in December 2011. 
    Id. at 161
    . In telephone calls from
    jail, Williams continued to direct the women’s work and told them to meet their quotas.
    
    Id. at 165-66
    . Talia and Erika continued working for him while he was incarcerated on
    an unrelated charge, helped him find a defense lawyer, and used the money from their
    acts of prostitution to meet his bail. 
    Id. at 163, 214, 273
    . Talia also visited him and told
    him that she loved him. 
    Id. at 163
    . Williams promised Talia to take her to Las Vegas
    once he was released, although he never did so. 
    Id. at 167
    . Talia told him that she
    10
    wanted to leave while he was incarcerated but stated that “[h]e kind of coerced [her] not
    to,” telling her that she “would lose [her] protection.” 
    Id. at 168
    .
    While Williams was incarcerated, the police questioned Talia and Erika. 
    Id. at 162
    . The women told the police that Williams was Erika’s boyfriend and declined to
    mention that he was physically abusive. 
    Id. at 162, 272
    . Talia lied to the police about
    whether he was forcing her to commit acts of prostitution and whether she was giving
    him money. 
    Id. at 167, 216
    . She testified that she lied to the police because, “when [she]
    first got there, [she] felt like [she] didn’t have anywhere to go, and at this point [she]
    really didn’t feel like [she] had anywhere to go.” 
    Id. at 162
    . She stated that “[a]t that
    point [she] felt like the consequences of ratting out [Williams] and then getting out later
    would be worse than lying to the police.” 
    Id.
    After Williams was released from jail, he hit Talia three times in the face. 
    Id. at 205
    . He was reincarcerated in January 2012, and Talia continued to try to help him to get
    released. 
    Id. at 217-18
    . Talia testified that when Williams told her that he was going to
    be released, she was happy about it. 
    Id. at 220
    .
    Talia was arrested twice for prostitution while working for Williams. 
    Id. at 206
    .
    She eventually left Williams when her mother came to Philadelphia for Talia’s court date
    on a prostitution charge. 
    Id. at 168-70
    . She went home with her mother and never
    worked for Williams again. 
    Id. at 170
    . Talia testified that she finally decided to leave
    because her mother and sister were present and she knew it was her chance to do so. 
    Id. at 175
    . She asserted that she had wanted to leave before, but “was scared and didn’t for a
    lot of reasons.” 
    Id.
     She later talked on the phone to Williams, who told her he still loved
    11
    her and asked her why she left. 
    Id. at 170
    . After that, Williams sent Talia a text message
    telling her he loved her, wanted her to return, and would send her money. 
    Id. at 172
    .
    On cross-examination, Erika acknowledged that she still loved Williams, had his
    name in her phone as “Sexy,” and was excited for him to be released from jail. 
    Id. at 292, 306
    . She said that she engaged in prostitution because of her love for Williams and
    her desire to pay him. 
    Id. at 292
    . She said that their relationship was an “interchange of
    benefits” and that Williams’s violent conduct did not motivate her to engage in
    prostitution. 
    Id. at 293, 299
    . She claimed that she had testified earlier that Williams hit
    her and Talia because the federal government had threatened her. 
    Id. at 308, 317
    . She
    denied that Williams ever used force, threats of force, or coercion to induce her to
    commit commercial sex acts. 
    Id. at 308
    . She also said that she was not insecure around
    Williams and that he never had placed her in danger or caused her serious harm. 
    Id. at 308
    .
    Williams testified at the trial. In his version of events, the women asked him to
    get involved with him in their acts of prostitution. 
    Id. at 507
    . He apologized for
    accepting money from the women, but contended that he was their security and that they
    enjoyed the “fun” they had with him. 
    Id. at 455-58, 508
    . Williams claimed that the
    women cared for him. 
    Id. at 459
    . He also contradicted their testimony that they received
    little from him, stating that the “women eat big lobsters. They wear Louis Vuitton shoes.
    They buy bags that cost $1,000.” 
    Id. at 453
    . Williams testified that he is “pushy” and
    has “a big mouth” but does not “bite at all” and denied that he had ever hit, punched,
    shoved, or kicked the women. 
    Id. at 456, 492
    . Williams claimed that he never had met
    12
    Ivy, asserting that he did not “know [Ivy] from a can of water” or “a can of beans.” 
    Id. at 451, 480
    . When commenting on recorded evidence in which he sounded angry, he
    acknowledged that he sounded “hurtful” but explained that he was like a teacher with an
    out-of-control classroom: he needed to be forceful because he was responsible for the
    women and they would have gotten hurt without his guidance. 
    Id. at 460
    . He claimed
    that his testimony differed from the women’s because they “were under pressure from the
    government” to lie. 
    Id. at 485
    . Williams also contended that the federal government had
    threatened Erika and that he intended in his letter to her to encourage her to testify
    truthfully. 
    Id. at 463-64
    . After considering the testimony that we partially, but
    nevertheless at great length, have described, the jury found Williams guilty on all three
    counts. 
    Id. at 788-91
    .
    IV. DISCUSSION
    A. The Appropriateness of the District Court’s Jury Instructions
    Williams contends that the District Court committed reversible error in its use of a
    four-element test that separated the statutory language concerning acts of force, fraud, or
    coercion from the element of the sex offenses concerning causation in 
    18 U.S.C. § 1591
    .
    
    Id. at 616-17
    . He argues that the District Court’s description of the elements in that
    manner constructively amended the indictment because the description allowed the jury
    to convict Williams for using force, threats of force, fraud, or coercion against a person
    who engaged in commercial sex acts even if his actions did not the cause that person to
    engage in those sex acts. These instructions, so Williams’s argument goes, required the
    13
    jury to convict him, if it found (1) that he used threats of force, force, fraud, or coercion
    against someone even if these wrongful acts did not cause that person to engage in a
    commercial sex act—e.g., in a situation of domestic abuse—and (2) that a person was
    caused to engage in a commercial sex act for any other reason—such as for love or
    profit.3 This language, he maintains, is broader than both the indictment and the statute,
    so his convictions on the sex trafficking counts should be reversed.
    1. The Standard of Review
    The parties dispute whether Williams properly raised and preserved his objection
    to the jury instructions, and thus whether the harmless error or plain error standard of
    review applies in our review of this issue. If an objection is raised and preserved for
    appeal and the appellant establishes that there was trial error the burden shifts to the
    prosecutor to demonstrate that the error was harmless. On the other hand, if a defendant
    does not preserve the issue for appeal by objecting at trial, he has the burden to establish
    on appeal that the error meets exacting requirements to show that the error was plain
    entitling him to relief on appeal. United States v. Russell, 
    134 F.3d 171
    , 178 (3d Cir.
    1998).
    Federal Rule of Criminal Procedure 30(d) requires a party to object to jury
    instructions before the jury retires to deliberate, and at that time provide the court with
    the specific objection and the grounds for the objection. When a defendant makes a
    3
    Williams in his testimony summed up this legal argument succinctly: “I thought this
    charge was sex trafficking by force, meaning like the people – when they bring people
    from Russia and put them in the basement and make them see a person and put them back
    down there. That’s what I thought was going on, not the fact that whoever hits a
    prostitute gets 15 years.” App. at 450.
    14
    timely, but unsuccessful, objection to a jury instruction, an appellate court will exercise
    plenary review in considering the objection. United States v. Waller, 
    654 F.3d 430
    , 434
    (3d Cir. 2011). If the court finds that there were defects in the jury instructions rising to a
    constitutional level, it will review the instructions to determine if the error was harmless.
    
    Id.
    A defendant’s failure to make a timely objection to a jury instruction prevents the
    appellate court from conducting a harmless error review. Fed. R. Crim. P. 30. Instead,
    the more demanding standard in Federal Rule of Criminal Procedure 52(b), which
    permits courts to consider a plain error that affects substantial rights even when a party
    failed to raise the issue at trial, must be applied. See United States v. Antico, 
    275 F.3d 245
    , 265 (3d Cir. 2001), abrogated on other grounds by Skilling v. United States, 
    561 U.S. 358
    , 
    130 S.Ct. 2896
     (2010). We have held that “[a]n error is plain if it is clear or
    obvious under current law.” United States v. Tann, 
    577 F.3d 533
    , 537 (3d Cir. 2009)
    (internal quotation marks omitted). The error affects substantial rights when it “cause[s]
    the defendant prejudice, in that it affect[s] the outcome of the district court proceedings.”
    
    Id. at 538
     (internal quotation marks omitted). The defendant bears the burden of making
    a “specific showing of prejudice” under this rule. 
    Id.
     With respect to granting relief the
    rule is “permissive, not mandatory.” United States v. Olano, 
    507 U.S. 725
    , 735, 
    113 S.Ct. 1770
    , 1778 (1993). An appellate court may take remedial action if the error
    “seriously affect[s] the fairness, integrity, or public reputation of judicial proceedings.”
    United States v. Atkinson, 
    297 U.S. 157
    , 160, 
    56 S.Ct. 391
    , 392 (1936). In determining
    whether there has been a plain error in jury instructions, a court will “consider the totality
    15
    of the instructions . . . , not focusing on a particular paragraph in isolation.” United States
    v. Kukafka, 
    478 F.3d 531
    , 539 (3d Cir. 2007) (citing United States v. Coyle, 
    63 F.3d 1239
    , 1245 (3d Cir. 1995)).
    A mere request for an instruction is not an objection even if the court does not give
    the instruction as such a standard would burden the district court with “speculat[ing] on
    what sorts of objections might be implied through a request for an instruction and
    issu[ing] rulings on ‘implied’ objections that a defendant never intends to raise.” Jones v.
    United States, 
    527 U.S. 373
    , 388, 
    119 S.Ct. 2090
    , 2101 (1999). We, however, do not
    mandate the use of special language to preserve an objection. United States v. Currens,
    
    290 F.2d 751
    , 759 (3d Cir. 1961) (stating that the appellate court should not take a
    “wooden[]” approach to determining whether objections were preserved); see 2A Charles
    Alan Wright & Peter J. Henning, Federal Practice & Procedure Federal Rules of Criminal
    Procedure § 484 (4th ed. 2009). The objection must be clear enough that “a trial court
    [may] correct any instructional mistakes before the jury retires.” Jones, 
    527 U.S. at
    387-
    88, 
    119 S.Ct. at 2101
    . This requirement “help[s] to avoid the burdens of an unnecessary
    retrial.” 
    Id. at 388
    .
    Williams claims that our holding in Russell, 
    134 F.3d 171
    , should guide our
    review of his counsel’s approach to the jury instructions. In that case, we held that the
    defendant’s counsel preserved an objection to the jury instructions even though he failed
    to state specifically that he objected to them. 
    Id. at 178
    . But in Russell there had been a
    conference in the district court about those instructions that alerted the court to the
    counsel’s argument that the instructions failed to comply with one of our prior decisions.
    16
    
    Id.
     The court responded that it would review that argument. 
    Id. at 179
    . We held that the
    court’s response showed that it recognized that the argument was an objection. 
    Id.
    Accordingly, Russell is inapposite, as Williams’s counsel did not give an indication
    similar to that the defense counsel gave in Russell that would have put the District Court
    on notice that Williams was objecting to the instructions.
    In the present case, Williams’s counsel did not preserve the objection to the lack
    of causation in the elements of the offense. While he objected along those lines during
    the discussion of the special verdict form that the District Court sent to the jury, he did
    not raise that argument again when discussing the jury instructions detailing the elements
    of the offense. App. at 515-21. Moreover, before instructing the jury the Court asked the
    parties if they had any objections to Williams’s proposed jury instructions detailing the
    elements of the offense. Id. at 519. The government at that time responded that its
    proposed jury instructions included four elements rather three elements as Williams
    proposed. Id. at 520. Williams’s counsel stated that he “forgot to include the
    component” of “the financial aspect” of the offense.4 Id. The following exchange then
    ensued:
    The Court: And I will give the government’s points for charge with the four
    elements in it.
    [Counsel for Williams]: With that fourth element of the financial. That’s fine.
    The Court: Okay. So you withdraw your three and accept her four?
    [Counsel for Williams]: And I understand that the other three that I included –
    The Court: Are included within the charge.
    4
    Williams argues that his counsel was mistaken, as he had not forgotten the “financial
    aspect.” Appellant’s reply br. at 1. While that may be true, the counsel’s mistake
    concerning his proposed jury instructions failed to put the District Court on notice that
    Williams objected to the charge on the causation issue.
    17
    [Counsel for Williams]: Yes.
    The Court: Very well.
    Id. at 520.
    Even if Williams’s counsel understood this exchange to mean that the District
    Court would use his proposed jury instructions on the force and causation elements,
    thereby nullifying any need to object on that issue, this exchange did not put the District
    Court on notice of his current objection to the Government's proposed instructions. Thus,
    once Williams’s counsel later learned that the District Court would not use his exact
    formulation, to preserve his objection he was required to object on the grounds that he
    now raises and he was given the opportunity to do so. After the District Court finished
    reading the instructions to the jury, it gave Williams’s counsel another opportunity to
    object as it asked the parties, “[I]s there anything else you want me to include in this
    instruction, or anything that I might have misstated that I should correct before I send the
    jury out?” Id. at 625. Inasmuch as Williams’s counsel did not object to the four-element
    test on the basis that he advances on this appeal, id., the Court could not have been on
    notice of that objection, particularly inasmuch as Williams’s counsel explicitly indicated
    his satisfaction with the instructions. Hence we review the jury instructions for plain
    error.
    2. The Jury Instructions and the Verdict Form
    Williams claims on this appeal that the jury instructions constructively amended
    the indictment by broadening the “possible bases for conviction from that which appeared
    in the indictment.” Appellant’s br. at 29 (quoting United States v. Lee, 
    359 F.3d 194
    , 208
    (3d Cir. 2004)). He argues that the instructions impermissibly omitted the causal link that
    18
    
    18 U.S.C. § 1591
     requires between force, fraud, or coercion and the commercial sex act.
    
    Id. at 29-32
    . He therefore argues that the instructions allowed the jury to convict him for
    using force or coercion, and, separately, causing the women to engage in commercial sex
    acts, perhaps voluntarily, and thus not requiring the jury to find, as the statute requires,
    that he used force to cause the women to engage in commercial sex acts. 
    Id.
     Though, as
    we have stated, in a plain error analysis, the defendant bears the burden of demonstrating
    prejudice, a constructive amendment of an indictment creates a rebuttable presumption of
    prejudice. United States v. Syme, 
    276 F.3d 131
    , 154 (3d Cir. 2002).
    At the time of the offense,5 the relevant part of the sex trafficking statute involved
    here, 
    18 U.S.C. § 1591
     (2008), provided that:
    (a) Whoever knowingly –
    (1) in or affecting interstate or foreign commerce . . . recruits, entices, harbors,
    transports, provides, obtains, or maintains by any means a person; or
    (2) benefits, financially or by receiving anything of value, from participation in
    a venture which has engaged in an act described in violation of paragraph (1),
    knowing, or in reckless disregard of the fact, that means of force, threats of force,
    fraud, coercion described in subsection (e)(2), or any combination of such means
    will be used to cause the person to engage in a commercial sex act, . . . shall be
    punished . . . .
    To violate this statute, a perpetrator must know or recklessly disregard that “means of
    force, threats of force, fraud, coercion, . . . or any combination . . . will be used to cause
    the person to engage in a commercial sex act.” 
    Id.
     (emphasis added). The statute defines
    “coercion” as
    5
    The statute was amended after Williams committed his offenses but we are not
    concerned with the amendments.
    19
    (A) threats of serious harm to or physical restraint against any person;
    (B) any scheme, plan, or pattern intended to cause a person to believe that failure
    to perform an act would result in serious harm to or physical restraint against any
    person; or
    (C) the abuse or threatened abuse of law or the legal process.
    
    Id.
     § 1591(e)(2). The statute defines “serious harm” as used in the definition of
    “coercion” to mean “any harm, whether physical or nonphysical, including
    psychological, financial, or reputational harm, that is sufficiently serious, under all the
    surrounding circumstances, to compel a reasonable person of the same background and in
    the same circumstances to perform or to continue performing commercial sexual activity
    in order to avoid incurring that harm.” Id. § 1591(e)(4).
    The District Court provided the following instructions to the jury: “The second
    element of each of these Counts . . . is that ‘the defendant knew or recklessly disregarded
    the fact that force, threats of force, fraud, or coercion would be used with respect to this
    person. . . . Third, ‘that the defendant knew or was in reckless disregard of the fact that
    this person would be caused to engage in a commercial sex act.’” App. at 616-17
    (emphasis added).
    Williams makes a plausible argument that, in an interpretation of these two
    statements in isolation, “would be caused” is not directly linked with force, fraud, or
    coercion.6 But we hold that, viewing the jury instructions as a whole, the District Court
    6
    
    18 U.S.C. § 1591
     does not require that there be a direct temporal nexus between the
    threats, force, fraud, or coercion and the commercial sex act although the closer the
    coercive conduct is to the acts of prostitution, the more likely the causation element of the
    offense will be satisfied. Accordingly, a person may be guilty under the statute for
    20
    did not commit plain error or error at all in giving the instructions.7 As the jurors
    examined the verdict forms, the Court informed them that “Count 1 charges both sex
    trafficking by force, and also the attempted sex trafficking. . . .” 
    Id. at 604
    . The Court
    told the jurors that the indictment alleged that Williams committed “the offense of sex
    trafficking of [sic] force by [sic] Person 1” and connected that to the jury verdict slip,
    stating that “you are to first make a determination as to whether or not the government
    has proven him guilty of sex trafficking by force of Person 1.” 
    Id. at 605
    . The verdict
    form stated that Count 1 was “[s]ex trafficking by force of Person 1.” 
    Id. at 788
    . The
    portion of the verdict form describing the elements of attempt also used the term “sex
    trafficking by force.” 
    Id. at 789
    . The same applied to Count 2. 
    Id. at 789-90
    . The Court
    read those parts of the verdict form to the jurors. 
    Id. at 607-610
    .
    Furthermore, contrary to Williams’s assertion that the District Court told jurors not
    to pay attention to the indictment, the Court alerted the jurors to its exact terms. 
    Id. at 612
    . The Court told the jury that Williams was charged with two counts of “sex
    trafficking by force” and read the statutory language included in the indictment: “that
    knowingly creating a pattern of behavior that coerces a victim into committing
    commercial sex acts. See United States v. Todd, 
    627 F.3d 329
    , 331-34 (9th Cir. 2009), as
    amended Nov. 15, 2010 (stating that “[w]hat the statute means to describe, and does
    describe awkwardly, is a state of mind in which the knower is familiar with a pattern of
    conduct” and upholding a conviction when the defendant imposed rules about daily
    earnings and requested that they be given to him, the victim testified that she believed the
    defendant would beat her if she kept any earnings from him, the defendant beat a woman
    in front of the victim, and the defendant beat the victim for violating the rules).
    7
    We agree with both parties that the defense instruction was “a bit clearer” by
    eliminating the passive voice in the third element. Appellee’s br. at 28.
    21
    means a [sic] force, threat of force, fraud or coercion, or any combination of such means,
    will be used to cause the person to engage in a commercial sex act . . . .” 
    Id. at 613-14
    .
    The District Court recapitulated that “it is a federal crime for anyone in or
    affecting commerce” to engage in a number of activities “knowingly or in reckless
    disregard of the facts that means of force, threat of force, fraud, or coercion would be
    used to cause that person to engage in a commercial sex act.” 
    Id. at 615
    . Immediately
    after that, the Court read the elements at issue here for Counts 1 and 2. 
    Id. at 615-17
    .
    Then the Court explicitly linked language showing causation with the language at issue:
    If, as in Count 1 and 2, the government alleges that the defendant engaged
    in sex trafficking while knowingly or in reckless disregard of the fact that
    force, threat of force, fraud, or coercion would be used to cause a person to
    engage in a commercial sex act, then the second element of the offense,
    which the government must prove beyond a reasonable doubt, is that the
    defendant knew or acted in reckless disregard of the fact that force, threats
    of force, fraud or coercion would be used.
    
    Id. at 619
    . The Court also advised the jury that the third element “is that the defendant
    knew that the victim would be engaged in a commercial sex act.” 
    Id. at 620
    . Despite the
    ambiguity in the two elements, the instructions as a whole focused the jury on the
    government’s burden to prove the causal link between the unlawful means described and
    the commercial sex acts.
    Williams argues that Rosemond v. United States, 
    134 S.Ct. 1240
     (2014), a case in
    which the elements of the jury instruction were unclear, should inform our decision.
    Rosemond concerned jury instructions for aiding and abetting under 
    18 U.S.C. § 924
    (c),
    which criminalizes the use or carrying of a gun “during and in relation to any crime of
    violence or drug trafficking crime.” 
    134 S.Ct. at 1243
    . The Supreme Court held that
    22
    liability for aiding and abetting that offense must include “advance knowledge of a
    firearm’s presence.” 
    Id. at 1251
    . The district court in that case gave the instruction that
    the defendant was guilty of aiding and abetting that offense if “(1) [he] knew his cohort
    used a firearm in the drug trafficking crime, and (2) [he] knowingly and actively
    participated in the drug trafficking crime.” 
    Id.
     Thus, the additional instruction that a
    defendant must “willfully and knowingly seek[] by some act to help make the crime
    succeed” did not remedy the absence of “advance knowledge” in that jury instruction.8
    
    Id. at 1252
    . The aiding and abetting “umbrella instruction” failed to provide any context
    to alert the jury that advance knowledge of the gun’s presence was needed.
    But the situation in Rosemond differs from that here. Here, the surrounding
    instructions require a causal link between the threats of force, force, fraud, or coercion
    and the commercial sex acts for Williams to be convicted. In the circumstances, we need
    8
    The Supreme Court also recognized that the issue with the jury instructions was further
    compounded by the prosecutor’s statement to the jury that “a person cannot be present
    and active at a drug deal when shots are fired and not know their cohort is using a gun,”
    which sent “the message to the jury . . . that it need not find advance knowledge.”
    Rosemond, 
    134 S.Ct. at 1252
    . That is not the situation here because both parties focused
    extensively on the causation element of the sex trafficking offenses in their opening and
    closing arguments. See App. at 51, 56-57, 61-62, 545, 548-49. In particular, the
    government in closing told the jury to consider if Williams knew “that force, threats or
    force of [sic] coercion would be used to cause a person . . . to engage in a commercial sex
    act, not every commercial sex act, not the beginning commercial sex act, not most
    commercial sex acts, just one. You only have to find that that caused them to engage in
    just one commercial sex act.” Id. at 545-46. Williams’s counsel made that element the
    crux of his closing: “But under the law, members of the jury, the force, the threats, the
    coercion has to cause somebody, a person, to commit a commercial sex act. There has to
    be a cause and effect. The force, the beatings, the threats, the coercion, has to cause
    that.” Id. at 548-49.
    23
    not determine whether the use of the special verdict form compounded any error,
    inasmuch as there was not a plain error or an error at all.
    B. The Sufficiency of the Evidence
    Williams contends that the evidence was insufficient to support either of his two
    convictions for sex trafficking by force, fraud, or coercion. He makes three primary
    arguments: the evidence of his acts of violence toward the two women happened “in the
    context of complex relationships,” Appellant’s br. at 42, the evidence at trial at most
    showed a temporal but not causal connection between the violent acts and the women’s
    commercial sex acts, id. at 44, and the evidence failed to show that he made any threats
    or used fraud or coercion that caused the women to engage in commercial sex acts. Id. at
    46. The government responds that the evidence was sufficient for a rational juror to
    determine that Williams knew that his use of force, threats of force, or coercion would
    cause Talia and Erika to engage in commercial sex acts. Appellee’s br. at 45.
    It is well established that we must uphold a jury’s verdict if after our review of the
    record we conclude that the jury rationally could have found proof of guilt beyond a
    reasonable doubt. United States v. Caraballo-Rodriguez, 
    726 F.3d 418
    , 430 (3d Cir.
    2013) (en banc) (quoting United States v Brodie, 
    403 F.3d 123
    , 133 (3d Cir. 2005)
    (internal quotation marks omitted)). This standard is “particularly deferential” and we
    are cautious not to “act as a thirteenth juror.” Id. at 430-31. In reviewing a claim
    concerning the sufficiency of the evidence at trial, we “do not weigh evidence or
    determine the credibility of witnesses in making [our] determination.” United States v.
    Miller, 
    527 F.3d 54
    , 60 (3d Cir. 2008) (quoting United States v. Gambone, 
    314 F.3d 163
    ,
    24
    170 (3d Cir. 2003) (internal quotation marks omitted)). Thus, a defendant must “clear a
    high hurdle to prevail on [a] challenge to the sufficiency of the evidence.” United States
    v. Bailey, 
    840 F.3d 99
    , 110 (3d Cir. 2016).
    As we detailed above, the statute in relevant part at the time of Williams’s offense
    provided that “whoever knowingly . . . recruits, entices, harbors, transports, provides,
    obtains, or maintains by any means a person” or “benefits, financially or by receiving
    anything of value, from participation in a venture which has engaged” in one of these
    acts, “knowing, or in reckless disregard of the fact, that means of force, threats of force,
    fraud, coercion . . . , or any combination of such means will be used to cause the person
    to engage in a commercial sex act . . . .” is guilty of a criminal offense. 
    18 U.S.C. § 1591
    (2013).
    Applying the standard that we set forth above, we hold that beyond any question
    the evidence was sufficient to support the jury verdict convicting Williams on the two sex
    trafficking offenses. According to Talia’s testimony, Williams hit Erika in front of her
    the same night he convinced Talia to work as a prostitute for him. Talia testified that she
    felt at the time that she had few other options because she was in an unfamiliar location
    with people she did not know and had been required to leave the residence at which she
    had been staying. Talia turned over to Williams all the money that her “dates” paid her,
    and he usually allowed her to keep only some money for food. Williams gave her strict
    quotas to meet, dictated how long she could talk to others, determined whether she would
    have breaks or days off from work, and prohibited her from talking to certain people.
    When she talked to one of Williams’s associates, Williams threatened to punch her in the
    25
    face if she did it again. Talia described much of the abuse she witnessed, including how
    Williams would hit Erika when Erika disagreed with him.
    In response to a work-based issue with a prospective client, Williams physically
    abused Talia and Erika and immediately sent them back outside to solicit clients on the
    street. This testimony itself provided sufficient evidence upon which a reasonable juror
    could have found proof that, on that particular day, Williams’s use of force was causally
    linked to their commercial sex acts. According to Talia, Williams used physical violence
    and threats of violence to ensure that they continued to do what he wanted and to keep
    them together. Talia lied to the police about Williams’ conduct because she felt that the
    consequences of telling the police the truth about Williams would be worse than the
    consequences if she lied to them. When Talia tried to leave Williams, she testified that
    he “kind of coerced [her] not to” do so. Talia finally left Williams when her mother came
    from Atlanta because she knew she had a chance to leave. There was more than enough
    evidence to support the verdict finding Williams guilty on Count 1, the count involving
    Talia.
    The evidence also supported a conviction with respect to Erika on Count 2, the
    count involving her. Although Erika stated that she chose to work for Williams of her
    own volition, her testimony showed that of all the women that Williams controlled he
    abused her the most. Williams required Erika to meet a monetary quota every day and
    demanded that she turn over all the money she received from her acts of prostitution to
    him. He abused Erika numerous times for disagreeing with him, cut Erika deeply with
    hair clippers because he held her responsible for the arrest of a friend of his, and he beat
    26
    her after a prospective client acted strangely towards her. Erika often suffered physical
    injury from Williams’s abuse and as a result had black eyes, swollen lips, and missing
    teeth. Immediately after many of these assaults Williams sent Erika out to solicit clients
    on the streets. Erika’s mother testified that Williams told her he had to beat or restrain
    Erika because she had “gotten them both in trouble.” Williams also yelled at Erika that
    he “got to come over there and put a slave trader over top of [her] to do anything,” which
    Erika testified meant that he would send someone to be with her in a physical way. She
    acknowledged that her relationship with Williams was verbally abusive and detailed
    Williams’s abuse of other women, including his whipping one of them with a telephone
    cord he pulled out of the wall. This evidence more than sufficed for a jury to determine
    that Williams’s use of force, threats of force, or coercion caused Erika to engage in acts
    of commercial prostitution.
    C. The Exclusion of Evidence under Federal Rule of Evidence 412
    Williams contends that the District Court’s exclusion of evidence concerning
    Erika’s prior years of prostitution in accordance with Fed. R. Evid. 412 deprived him of
    the right to present a defense under the Fifth and Sixth Amendments to the Constitution.
    Appellant’s br. at 52-53. Rule 412 prohibits the admission of “evidence offered to prove
    that a victim engaged in other sexual behavior” and “evidence offered to prove a victim’s
    sexual predisposition.” He claims that this evidence was admissible under an exception
    to the general rule of inadmissibility in Rule 412 for “evidence whose exclusion would
    violate the defendant’s constitutional rights.” Rule 412(b)(1)(C). He proposes three
    different theories why evidence of Erika’s prior acts of prostitution should have been
    27
    admitted: (1) the evidence was relevant to show that force was unnecessary to cause her
    to engage in commercial sex acts; (2) it rebutted any claims that he created Erika’s and
    Talia’s advertisements online; and (3) it provided a logical chain of inference that Erika
    chose willingly to work with Williams. Appellant’s br. at 53-54; Appellant’s Reply br. at
    17.
    We apply an abuse-of-discretion standard on this exclusion of evidence issue but
    to the extent that the District Court interpreted the Federal Rules of Evidence our review
    is plenary. United States v. Duka, 
    671 F.3d 329
    , 348 (3d Cir. 2011). In applying an
    abuse-of-discretion standard, we “afford district courts ‘broad discretion on evidentiary
    rulings’” because they are familiar “‘with the details’ of the cases in front of them” and
    have “‘greater experience in evidentiary matters.’” Bailey, 840 F.3d at 117 (quoting
    United States v. Finley, 
    726 F.3d 483
    , 491 (3d Cir. 2013)). A reversal is only justified
    when the district court’s decision is “arbitrary” or “irrational.” 
    Id.
     (quoting United States
    v. Schneider, 
    801 F.3d 186
    , 198 (3d. Cir. 2015)).
    Rule 412 applies in cases involving “alleged sexual misconduct,” conduct that is
    within the terms of the sex trafficking statute at issue here. See, e.g., United States v.
    Roy, 
    781 F.3d 416
    , 420 (8th Cir. 2015). The evidence ordinarily barred by Rule 412 is
    only admissible “in designated circumstances in which the probative value of the
    evidence significantly outweighs possible harm to the victim.” See Rule 412 advisory
    committee’s note to the 1994 amendment. There are three exceptions to Rule 412 that
    can be applicable in criminal cases, one of which Williams argues applies here: a court
    28
    may admit “evidence whose exclusion would violate the defendant’s constitutional
    rights.” Rule 412(b)(1)(C).
    Other courts of appeals in precedential opinions have upheld the exclusion of
    evidence of an individual’s prior acts of prostitution in trials for commercial sex
    trafficking notwithstanding defendants’ arguments similar to those that Williams
    advances here.9 These opinions have held either that the evidence is irrelevant in the
    context of the circumstances in which it was offered or that its relevance is so outweighed
    by its prejudicial effect with respect to the victim that its exclusion does not violate a
    defendant’s constitutional rights. See United States v. Gemma, 
    818 F.3d 23
    , 34 (1st Cir.
    2016), petition for certiorari docketed, No. 16-6207 (Sept. 27, 2016) (holding that
    evidence of prior acts of prostitution “is either entirely irrelevant or of such slight
    probative value in comparison to its prejudicial effect that a decision to exclude it would
    not violate [the defendant’s] constitutional rights”); United States v. Rivera, 
    799 F.3d 180
    , 186 (2d Cir. 2015) (holding that evidence of women’s prior prostitution was
    irrelevant as it “does not suggest that appellants did not later threaten them with violence
    or deportation in order to coerce them into commercial sex”); Roy, 781 F.3d at 420
    (holding that prior acts of prostitution are irrelevant to “whether [the defendant] beat her,
    threatened her, and took the money she made from prostitution in order to cause her to
    engage in commercial sex”); United States v. Cephus, 
    684 F.3d 703
    , 708 (7th Cir. 2012)
    9
    Williams cites a number of cases that indicate courts have permitted evidence of prior
    sex acts, noting that defendants would not appeal a successful motion to admit evidence
    of prior sex acts under Rule 412. Appellant’s br. at 56. Those cases provide little
    guidance for us because the propriety of the admission of evidence of prior sex acts was
    not at issue in any of them.
    29
    (holding that testimony about a victim’s prior prostitution to show that she was not
    coerced or deceived into working for the defendant was irrelevant because it would not
    show “that she consented to be beaten and to receive no share of the fees paid by the
    johns she serviced” or “suggest that [the defendant] didn’t beat and threaten her”).
    We need not determine whether the constitutional exception under Rule 412
    applies here because, if the District Court erred on this issue, the error would have been
    harmless. After all, Erika admitted that she had been a prostitute for 12 years prior to her
    involvement with Williams, stated numerous times that she voluntarily worked as a
    prostitute for Williams, and testified that she was not motivated by his use of force,
    threats of force, fraud, or coercion to engage in prostitution. Williams’s counsel then
    capitalized on her admission of prior acts of prostitution in his closing. The exclusion of
    evidence concerning her prior acts therefore did not prevent Williams from making a
    defense based on her conduct. See Rivera, 799 F.3d at 189 (noting that even though the
    court prohibited cross-examining a witness on her prior commercial sex acts, defendant’s
    counsel still was able to use the defense that the victims were not defrauded based on
    their testimony).10
    D. The Absence of a Sua Sponte Charge on an Affirmative Defense
    Williams finally argues that he had a defense to the charge of witness tampering
    because his sole intent in sending his letter to Erika on which the tampering charge was
    10
    We do not discuss Rule 412 with respect to Talia because there was no evidence at trial
    that prior to her involvement with Williams that she had engaged in the conduct with
    which Rule 412 is concerned.
    30
    based was to encourage her to testify truthfully. He therefore contends that he was
    entitled to an affirmative defense instruction on the witness tampering pursuant to 
    18 U.S.C. § 1512
    (e) which instructs that a defendant has an affirmative defense if his
    “conduct consisted solely of lawful conduct and that the defendant’s sole intention was to
    encourage, induce, or cause the other person to testify truthfully.” Inasmuch as his
    counsel did not request this instruction, he argues that the District Court should have
    given this instruction sua sponte. He contends that the Court committed plain error when
    it did not give the instruction, and that we should reverse his conviction under 
    18 U.S.C. § 1512
     for witness tampering. Appellant’s br. at 60.
    The tampering statute under which the jury convicted Williams provides, in
    relevant part, that “[w]hoever knowingly uses intimidation, threatens, or corruptly
    persuades another person, or attempts to do so,” intending to “influence, delay, or prevent
    the testimony of any person in an official proceeding” is guilty of witness tampering. 
    18 U.S.C. § 1512
    (b). 
    18 U.S.C. § 1512
    (e) provides an affirmative defense to a tampering
    charge but the defendant bears the burden of proof by a preponderance of the evidence to
    show “that the conduct consisted solely of lawful conduct and that the defendant’s sole
    intention was to encourage, induce, or cause the other person to testify truthfully.” 
    18 U.S.C. § 1512
    (e).
    We review the circumstance that the District Court did not sua sponte provide an
    affirmative defense in accordance with 
    18 U.S.C. § 1512
    (e) for plain error. Fed. R. Crim.
    P. 30(d); Gov’t of V.I. v. Lewis, 
    620 F.3d 359
    , 364 (3d Cir. 2010). We therefore
    determine whether the Court made a “clear” or “obvious” error when it did not give an
    31
    affirmative defense charge. See Lewis, 
    620 F.3d at 364
     (quoting United States v. Turcks,
    
    41 F.3d 893
    , 897 (3d. Cir. 1994)). Next, we consider whether the claimed error affected
    substantial rights, i.e., whether it prejudiced the defendant by “affect[ing] the outcome of
    the trial proceedings.” 
    Id.
     Moreover, even if a court commits such an error, an appellate
    court exercises discretion to correct the error “sparingly” and only will do so if the error
    “seriously affects the fairness, integrity, or public reputation of judicial proceedings.” 
    Id.
    (quoting Tann, 
    577 F.3d at 535
    ).
    In general, “a defendant is entitled to an instruction as to any recognized defense
    for which there exists evidence sufficient for a reasonable jury to find in his favor.”
    Mathews v. United States, 
    485 U.S. 58
    , 63, 
    108 S.Ct. 883
    , 887 (1988). In determining
    whether a court plainly erred in not instructing the jury on an affirmative defense, an
    appellate court reviews the facts in the light most favorable to the defendant and
    considers whether there had been sufficient evidence presented at trial to support the
    claim of error. See Lewis, 
    620 F.3d at 364
    . But “trial courts generally are under no duty
    to raise affirmative defenses on behalf of a criminal defendant.” 
    Id.
     at 370 n.10.
    “Indeed, by raising affirmative defenses sua sponte, a trial court might actually harm a
    criminal defendant by undermining defense counsel’s strategic decisions.” 
    Id.
     (citing
    United States v. Van Kirk, 
    935 F.2d 932
    , 934 (8th Cir. 1991)); see also United States v.
    Tyson, 
    653 F.3d 192
    , 212 (3d Cir. 2011) (“A defendant’s strategy is his own. It is not for
    the district court to sua sponte determine which defenses are appropriate under the
    circumstances. In short, if [the defendant] wished to mount [a relevant affirmative
    defense], it was incumbent upon him to take the initiative to do so.”).
    32
    The District Court did not err when it did not sua sponte charge the jury that
    Williams was advancing an affirmative defense. After examining the evidence on the
    affirmative defense issue in the light most favorable to Williams, we conclude that the
    evidence did not require the Court to give an affirmative defense instruction. Williams
    testified that he sent Erika the letter to encourage her to tell the truth because the
    government was pressuring her to lie. App. at 463-64. We are aware that Erika claimed
    that she told the government that Williams had harmed her because the Federal Bureau of
    Investigation had threatened to arrest her if she did not do so. 
    Id. at 309
    . But there was
    no other evidence to indicate that Williams was attempting to persuade her to testify
    truthfully.
    Further, the evidence makes it clear that Williams did not have the “sole” intention
    when he wrote Erika to encourage her to tell the truth at trial. After all, Williams testified
    that he sent the letter because he was “in a really bad situation and [he] need[ed] some
    help.” Id. at 464. Moreover, in his letter to Erika, Williams wrote “you r [sic] my last
    hope,” and “[Talia] & you are their case.” Id. at 812. That language implies that his real
    concern in sending the letter was his own fate. The evidence does not show that he
    wanted Erika to tell the truth even if it harmed his case. Therefore, the District Court did
    not commit a plain error or any error at all when it did not give the affirmative defense
    instruction sua sponte. See Roper v. United States, 
    403 F.2d 796
    , 798 (5th Cir. 1968) (a
    district court’s failure to charge an alibi defense sua sponte was not plain error
    “especially where as here the factual foundation” for it “seems obscure, to say the least”).
    33
    Williams’s counsel was free to ask the District Court to include an affirmative
    defense instruction in its charge to the jury if he considered it wise to do so. See Lewis,
    
    620 F.3d at
    370 n.10; United States v. Atkins, 
    487 F.2d 257
    , 259 (8th Cir. 1973) (holding
    that the trial court did not commit plain error when it did not give an alibi instruction sua
    sponte because “[a] trial court need not give such an instruction in the absence of a
    request therefor”); United States v. Sferas, 
    210 F.2d 69
    , 71 (7th Cir. 1954) (“[A]ppellate
    courts will not, generally speaking, pass upon defenses which have not been previously
    brought to the attention of the trial court.”). After our review of the record, we conclude
    that the evidence gave little, if any, support for giving the affirmative defense. We can
    understand that counsel may have made the determination that it would have been unwise
    to ask the Court to charge the jury to consider the affirmative defense as the charge would
    have placed the burden of proof on that issue on Williams. In this regard, counsel might
    have deemed it strategically wise to keep the jury solely focused on the force or coercion
    issues in determining whether the government had proven its case beyond a reasonable
    doubt, particularly on the sex trafficking charges. We, of course, recognize that we are
    speculating on counsel’s motives in not advancing the affirmative defense. But with or
    without the speculative possibilities, the Court did not err, let alone commit plain error,
    when it did not give an instruction on the affirmative defense sua sponte.
    II.   CONCLUSION
    For the foregoing reasons, we will affirm the judgment of conviction and sentence
    entered on April 8, 2015.
    34