United States v. Roach , 896 F.3d 1185 ( 2018 )


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  •                                                                                  FILED
    United States Court of Appeals
    PUBLISH                              Tenth Circuit
    UNITED STATES COURT OF APPEALS                         July 24, 2018
    Elisabeth A. Shumaker
    FOR THE TENTH CIRCUIT                            Clerk of Court
    _________________________________
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.                                                            No. 17-2085
    SHANE ROACH,
    Defendant - Appellant.
    _________________________________
    Appeal from the United States District Court
    for the District of New Mexico
    (D.C. No. 1:15-CR-02732-JAP-1)
    _________________________________
    Aric G. Elsenheimer, Assistant Federal Public Defender, Office of the Federal Public
    Defender for the District of New Mexico, Albuquerque, New Mexico, for Defendant –
    Appellant.
    James R.W. Braun, Assistant United States Attorney (James D. Tierney, Acting United
    States Attorney, on the brief) Office of the United States Attorney for the District of New
    Mexico, Albuquerque, New Mexico, for Plaintiff – Appellee.
    _________________________________
    Before MATHESON, MCKAY, and MCHUGH, Circuit Judges.
    _________________________________
    MATHESON, Circuit Judge.
    _________________________________
    A jury convicted Shane Roach of coercing D.G. into prostitution in violation of
    18 U.S.C. § 1591(a)(1). Mr. Roach recruited D.G. and, with help from Angela
    Santillanes, prostituted D.G. to clients. D.G. became scared and reached out for help,
    leading to Mr. Roach’s and Ms. Santillanes’s arrests.
    The Government charged Mr. Roach and Ms. Santillanes under § 1591(a)(1), but
    after Ms. Santillanes agreed to testify against Mr. Roach, it dropped her charge. At trial,
    Mr. Roach attempted to cross-examine Ms. Santillanes about three topics. The
    Government successfully objected.
    On appeal, Mr. Roach argues that the district court’s rulings preventing cross-
    examination violated (1) the Confrontation Clause and (2) the Federal Rules of Evidence,
    and because these errors were not harmless, we must vacate his conviction and remand
    for a new trial.
    Exercising jurisdiction under 28 U.S.C. § 1291, we affirm Mr. Roach’s conviction
    because (1) Mr. Roach waived his Confrontation Clause arguments, and (2) any error in
    limiting his cross-examination under the evidence rules was harmless.
    I. BACKGROUND
    Factual Background
    The Prostitution Operation
    In April 2015, Mr. Roach found D.G.’s advertisement on Backpage.com
    (“Backpage”), a website where prostitutes solicit clients, and offered to be her pimp. On
    their second in-person meeting, she agreed.
    From May to June 2015, Mr. Roach and Ms. Santillanes managed the prostitution
    operation, advertising D.G.’s services on Backpage and arranging for her to meet clients
    in motels and hotels. Clients scheduled an appointment through “Diamond”—Ms.
    2
    Santillanes’s alias—who then would inform Mr. Roach. He would then contact D.G.
    through a prepaid TracFone he bought for her. The client would meet D.G. in her room,
    and she would collect payment after the sex act. She saw three to six clients a day. Mr.
    Roach would then collect the money from her.
    Mr. Roach controlled the enterprise and D.G.’s activities. He chose her rates,
    selected her clients, and kept the proceeds. D.G. testified that he controlled her contact
    with others, in part by keeping her identification (e.g., driver’s license) and her personal
    cellphone. In his testimony, Mr. Roach disputed the level of control he had outside of
    client matters.
    The Arrests and Search
    In June 2015, D.G. started to fear that Mr. Roach was going to send her to another
    pimp. She notified Life Link, an organization that offers “program[s] for victims of
    human trafficking.” ROA, Vol. III at 514. It contacted the Albuquerque Police
    Department. 1 Police then contacted D.G., and she eventually disclosed her location. The
    police removed her from her motel room and interviewed her. She divulged Mr. Roach’s
    first name, identified him in an online photograph, and identified his car.
    After further investigation, officers obtained a warrant to track and search Mr.
    Roach’s car and to search his residence. After tracking his car’s location, they stopped it,
    discovered Mr. Roach and Ms. Santillanes inside, and arrested them. Executing the
    1
    D.G. testified that she had also contacted the police, but the testifying detective
    did not mention her call at trial.
    3
    search warrant, law enforcement searched Mr. Roach’s Albuquerque apartment and
    found prepaid gift cards that had been used to purchase advertisements on Backpage. 2
    Procedural Background
    First Indictment, Government Deal, and Superseding Indictment
    In July 2015, a grand jury indicted Mr. Roach and Ms. Santillanes on one count of
    sex trafficking by means of force, threats, fraud, and coercion in violation of 18 U.S.C.
    § 1591(a)(1). The Government made a deal with Ms. Santillanes: she agreed to testify
    against Mr. Roach in exchange for having her charge dismissed. In April 2016, a
    superseding indictment charged Mr. Roach alone with violating § 1591(a)(1). 3
    Pretrial Motions
    Mr. Roach filed a pretrial motion to cross-examine Ms. Santillanes regarding her
    dismissed charge. He also filed a set of three pretrial motions to cross-examine Ms.
    Santillanes about her prior and current involvement in prostitution. The district court
    granted Mr. Roach’s first motion and denied the others. 4
    2
    Officers also discovered heroin; a digital camera with photos of D.G.’s
    identification and photos used for her Backpage advertisement; and a .22 caliber firearm,
    which D.G. identified as Mr. Roach’s.
    3
    In the superseding indictment, the Government originally charged Mr. Roach
    with two counts of sex trafficking under § 1591(a)(1): trafficking (1) D.G. between
    May 27, 2015 and June 11, 2015 and (2) Ms. Santillanes between March 1, 2015 and
    June 11, 2015. Before trial, the Government dismissed the second count.
    4
    We describe these motions in greater detail in our discussion of Mr. Roach’s
    Confrontation Clause arguments.
    4
    Trial Testimony
    Mr. Roach’s trial spanned four days. This appeal concerns the testimony of three
    witnesses: D.G., Ms. Santillanes, and Mr. Roach. We provide an overview of their
    testimony here. 5
    a. D.G.
    D.G. testified about her initial meeting with Mr. Roach, day-to-day activities
    working for him, and her escape. She also testified about specific instances when Mr.
    Roach was controlling and violent, stating that he isolated her from the outside world
    using violence, intimidation, and threats.
    b. Ms. Santillanes
    Ms. Santillanes corroborated much of D.G.’s testimony. She confirmed that Mr.
    Roach had been both controlling and violent toward D.G. The district court limited
    defense counsel’s cross-examination on three lines of questioning: (1) the length of Ms.
    Santillanes’s potential sentence under 18 U.S.C. § 1591(a)(1), (2) lying to her pretrial
    services officer about residing with her grandparents, and (3) her potential fraud scheme
    with the prepaid gift cards discovered in Mr. Roach’s apartment. Mr. Roach contests
    these limitations on appeal.
    c. Mr. Roach
    Mr. Roach confirmed that he, Ms. Santillanes, and D.G. had engaged in a
    commercial prostitution enterprise, but he denied controlling D.G. through violence,
    5
    We describe their testimony in greater detail in our discussion of Mr. Roach’s
    Confrontation Clause and rules of evidence arguments.
    5
    intimidation, and threats. He disputed D.G.’s testimony about specific instances of
    violence and intimidation, but did admit that he hit her at least once. He characterized
    their professional relationship as consensual and supportive.
    The Verdict and Sentence
    The jury found Mr. Roach guilty. The district court imposed a sentence of 180
    months in prison. Roach filed this timely appeal.
    II. DISCUSSION
    On appeal, Mr. Roach argues that the district court improperly barred his
    cross-examination of Ms. Santillanes on the three topics identified above.
    First, he argues the district court violated the Confrontation Clause because it
    “limited [his] cross-examination of Ms. Santillanes to such an extent that the jury did not
    receive sufficient information to make a discriminating appraisal of Ms. Santillanes’[s]
    motives and bias.” Aplt. Br. at 36. We hold that Mr. Roach waived his Confrontation
    Clause arguments because he failed to raise them below and did not argue plain error on
    appeal.
    Second, he argues in the alternative that the court abused its discretion under the
    Federal Rules of Evidence. See Aplt. Reply Br. at 4. But even assuming a rules
    violation, we hold any error was harmless.
    We therefore affirm Mr. Roach’s conviction. 6
    6
    We address Mr. Roach’s Confrontation Clause arguments first and then turn to
    his evidence-rules arguments. Mr. Roach primarily raises constitutional arguments on
    appeal. Briefing on his nonconstitutional arguments is sparse.
    6
    Confrontation Clause
    Mr. Roach not only failed to make a Confrontation Clause argument below, his
    failure to argue plain error here waives this issue on appeal.
    Additional Factual Background
    We first provide additional background on (a) Mr. Roach’s pretrial motions and
    (b) defense counsel’s cross-examination at trial.
    a. Pretrial motions
    i. First pretrial motion
    Mr. Roach filed a “motion to allow cross-examination of D.G. and [Ms.
    Santillanes] regarding outstanding dismissed without prejudice charges.” ROA, Supp.
    Vol. I at 44 (capitalization omitted). He stated that Ms. Santillanes was “initially charged
    as a codefendant . . . regarding . . . the charge of sex trafficking involving D.G.,” but the
    Government “moved to dismiss the charge against [her].” 
    Id. at 46.
    He argued that he
    should be allowed to question Ms. Santillanes about her motivations for testifying. 
    Id. at 47.
    He made no mention of his Sixth Amendment right to confrontation nor a relevant
    Federal Rule of Evidence, but instead cited two cases. 
    Id. (citing Hart
    v. United States,
    
    565 F.2d 360
    , 362 (5th Cir. 1978) and United States v. Harris, 
    462 F.2d 1033
    , 1035
    (10th Cir. 1972)). Neither case concerned allegations of a Confrontation Clause
    violation. The district court granted the motion.
    ii. Other pretrial motions
    Mr. Roach also filed three motions in limine to cross-examine Ms. Santillanes
    about (1) her promoting prostitution in the present case and previously in the states of
    7
    Arizona, New Mexico, and Texas; (2) prostituting an individual in a related case; (3) her
    conviction for prostitution in Arizona; (4) prostituting herself while living with Mr.
    Roach; and (5) answering phone calls for Mr. Roach about D.G.
    In each motion, he argued that exclusion of the questioning would violate his right
    to confrontation. Because, Mr. Roach contended, the questioning would reveal Ms.
    Santillanes’s biases, prejudices, and motives, he had a right under the Confrontation
    Clause to cross-examine her on these five topics. He also relied on Federal Rules of
    Evidence 404(b), 412, and 608. The district court denied the three motions.
    b. Trial cross-examination
    At trial, defense counsel attempted to cross-examine Ms. Santillanes about the
    three aforementioned topics. The Government objected, and the district court sustained
    the objections.
    i. Length of sentence
    After asking Ms. Santillanes about her dropped charge, defense counsel cross-
    examined her about the length of her potential sentence:
    [Defense Counsel]: And that was quite a break, because
    before that happened, you were facing a pretty lengthy prison
    sentence, right?
    [Government]: Objection. Ask that we approach.
    The Court: Go ahead and state your objection.
    [Government]: We’re getting into punishment which I
    believe is not permissible evidence.
    The Court: That’s correct. That’s an incorrect form to
    inform the jury that there is a severe punishment.
    8
    ROA, Vol. III at 407-08. Defense counsel agreed with the court’s statement and
    explained that he “wasn’t attempting to introduce anything about [Mr. Roach’s] potential
    punishment,” but rather “[his] question was aimed toward [Ms. Santillanes’s]
    understanding, her motivation to testify falsely.” 
    Id. at 409.
    The court instructed counsel
    to “avoid any questions about punishment,” 
    id., and informed
    the jury to disregard the
    question, 
    id. at 410.
    Defense counsel did not pursue this matter further. He did not
    mention the Confrontation Clause.
    ii. Statement to pretrial services officer
    Before defense counsel resumed cross-examination of Ms. Santillanes on the
    second day of trial and before the jury returned to the courtroom, he requested “to
    cross-examine Ms. Santillanes on lying to her pretrial services officer.” 
    Id. at 399.
    The
    proposed cross-examination was based on her attorney’s having filed a pretrial motion
    stating her grandparents were willing to serve as her third-party custodians after the
    Government dropped her charges. 
    Id. Defense counsel
    contended that when the
    probation officers “went to go visit [her grandparents, they] told them she had not stayed
    with them, and furthermore that she would not have permission to stay with them if she
    had asked.” 
    Id. The Government
    objected to this request, arguing it would elicit “improper
    impeachment evidence under any of the rules.” 
    Id. The prosecutor
    stated that Ms.
    Santillanes “didn’t lie” and explained:
    What happened is that her original plan was to stay with those
    people, and when she got up here, they told her that they
    wouldn’t allow her to stay with them, so she was staying with
    9
    a third party that she was not authorized to be. But there isn’t
    criminal conduct in any way. And at best, it could be
    described as a misunderstanding between the probation
    officer and Ms. Santillanes.
    
    Id. at 399-400.
    The district court agreed with the Government and stated that it was “familiar with
    what happened because she was under pretrial supervision, and reports were sent to me
    from pretrial services.” 
    Id. at 400.
    “[I]f that testimony were allowed, [Ms. Santillanes]
    would probably try to explain . . . what happened, and it might result in others having to
    be called as witnesses to testify.” 
    Id. It “[did
    not] think it [was] proper impeachment.”
    
    Id. Defense counsel
    said nothing further on the issue.
    iii. Prepaid gift cards
    Finally, defense counsel questioned Ms. Santillanes about her collection of used
    prepaid gift cards:
    [Defense Counsel]: And would you save all of those credit
    cards 7 even after there was no money left on them?
    [Ms. Santillanes]: Yes.
    [Defense Counsel]: Why?
    [Ms. Santillanes]: Because there may have been something
    that myself and [Mr. Roach] were interested in doing after the
    prostitution.
    [Defense Counsel]: Well, this thing you were talking about
    that you were interested in, [Mr. Roach] didn’t know anything
    about it, right?
    7
    Counsel was referring to prepaid gift cards as credit cards.
    10
    [Ms. Santillanes]: No, but he showed a lot of interest in it, so
    we started talking about it together, and what we could do
    with it.
    [Defense Counsel]: And you were essentially instructing
    [Mr. Roach] on how to commit fraud, right?
    
    Id. at 414-15.
    At that point, the Government objected as to relevance. 
    Id. at 415.
    Defense counsel explained that Ms. Santillanes “was interested in perpetrating some sort
    of a fraud . . . . [s]o it goes to her credibility.” 
    Id. The Government
    argued that the
    deadline had passed for Rule 404(b) evidence and it could not evaluate this line of
    inquiry without adequate notice. 
    Id. at 416.
    The district court then asked how this cross-examination would impeach Ms.
    Santillanes’s testimony because she would be “talking about a crime that [had not been]
    committed.” 
    Id. at 417.
    Counsel responded:
    [W]hat I was talking about, and this went along testimony I
    was developing, that [Ms. Santillanes] was the one that knew
    all about the criminal activity, and she would teach [Mr.
    Roach] about that.
    
    Id. The court
    then said that counsel had already developed that point because Ms.
    Santillanes had testified to teaching Mr. Roach about the prostitution business. 
    Id. It concluded
    that the evidence was inadmissible “under the language of 404(b)” and that
    defense counsel should “stay away from it.” 
    Id. Defense counsel
    did not argue further.
    Legal Background
    We provide legal background on (a) offers of proof to preserve an objection for
    appeal, (b) offers of proof in the context of limitations on cross-examination, and
    (c) waiver.
    11
    a. Offers of proof
    To preserve an objection to the exclusion of evidence for appeal, the proponent
    must make an offer of proof at trial, “first, describ[ing] the evidence and what it tends to
    show and, second, identify[ing] the grounds for admitting the evidence.” United States v.
    Adams, 
    271 F.3d 1236
    , 1241 (10th Cir. 2001); see also Fed. R. Evid. 103(a)(2). This is
    so unless the nature of the excluded evidence and the ground for admitting it was
    “apparent from the context.” 
    Adams, 271 F.3d at 1241
    (quotations omitted); see also
    Fed. R. Evid. 103(a)(2). 8 “Unless the context in which evidence is offered makes clear
    the reason for the proffer, error cannot be assigned to the exclusion of evidence without
    an offer of proof.” United States v. Martinez, 
    776 F.2d 1481
    , 1485 (10th Cir. 1985).
    The proponent may present the offer in his questioning and objections at trial, see
    
    Adams, 271 F.3d at 1241
    , motions in limine, see United States v. Mejia-Alarcon, 
    995 F.2d 982
    , 988 n.3 (10th Cir. 1993), or pretrial conferences, see Frederick v. Swift Transp.
    Co., 
    616 F.3d 1074
    , 1083 (10th Cir. 2010).
    8
    Rule 103(a)(2) provides that “if the ruling excludes evidence, a party informs the
    court of its substance by an offer of proof, unless the substance was apparent from the
    context.” The provision does not mention, as our Adams case does, that the offer of proof
    must not only describe the evidence but also identify the grounds for admitting it. The
    advisory committee notes to Rule 103(a) make clear, however, that “[r]ulings on
    evidence cannot be assigned as error unless (1) a substantial right is affected, and (2) the
    nature of the error was called to the attention of the judge.” Fed. R. Evid. 103(a)
    advisory committee’s note to 1972 proposed rules.
    12
    b. Limitations on cross-examination
    An offer of proof is generally necessary to preserve an excluded line of cross-
    examination questioning. “Federal Rule 103 does not carve out any exception for
    questions posed on cross.” McCormick on Evidence ch. 6, § 51, at n.17 (Kenneth S.
    Broun ed., 7th ed. 2016). In United States v. Martinez, we determined the defendant
    failed to preserve his argument that the district court improperly limited his cross-
    examination of a government 
    witness. 776 F.2d at 1485-86
    . On appeal, the defendant
    asserted that the district court should have allowed the cross-examination under Federal
    Rules of Evidence 404(b) and 406, but “[n]o offer of proof was made, and the trial judge
    was not given any indication of defendant’s presently expressed purpose for his inquiry.”
    
    Id. at 1485.
    Because defense counsel did not tell the judge the evidentiary ground nor
    “the reason for the cross-examination,” he failed to preserve his challenge for appeal. 
    Id. at 1485,
    1486.
    When a district court restricts cross-examination at trial, the party seeking to
    cross-examine forfeits a challenge on appeal by failing to state the ground for objection,
    id.; stating a different ground at trial than on appeal, United States v. Gramajo, 565 F.
    App’x 723, 727 n.2 (10th Cir. 2014) (unpublished) (cited for persuasive value under Fed.
    R. App. P. 32.1, 10th Cir. R. 32.1); United States v. Faruki, 
    803 F.3d 847
    , 856 (7th Cir.
    2015); United States v. Reaves, 
    649 F.3d 862
    , 865 (8th Cir. 2011); or by failing at trial to
    object to the limitation at all, United States v. Mullins, 
    613 F.3d 1273
    , 1283 (10th Cir.
    2010).
    13
    c. Waiver
    An appellant who fails to preserve an evidentiary objection below may argue and
    establish plain error on appeal, United States v. LaHue, 
    261 F.3d 993
    , 1009 (10th Cir.
    2001), by showing that the “district court committed (1) error (2) that is clear or obvious
    under current law, and which both (3) affected her substantial rights and (4) undermined
    the fairness, integrity, or public reputation of judicial proceedings,” 
    Mullins, 613 F.3d at 1283
    . Failure to argue plain error on appeal waives the argument. United States v.
    Solomon, 
    399 F.3d 1231
    , 1238 (10th Cir. 2005); United States v. MacKay, 
    715 F.3d 807
    ,
    831 (10th Cir. 2013).
    Analysis
    a. Mr. Roach failed to raise a Confrontation Clause objection below
    Mr. Roach failed to raise the Confrontation Clause issue below for all three lines
    of questioning, either at trial or in his pretrial motions. To preserve the issue, he needed
    to describe (1) the evidence and (2) the ground to admit it. See 
    Adams, 271 F.3d at 1241
    .
    He failed to do the former in his pretrial motions and the latter at trial.
    As previously explained, Mr. Roach’s Confrontation Clause arguments concern
    the district court’s refusal to allow his lawyer to cross-examine Ms. Santillanes about
    (1) the length of her potential sentence under 18 U.S.C. § 1591(a)(1), (2) her alleged lie
    to her pretrial services officer, and (3) her possible alleged scheme to use the prepaid gift
    cards for fraud. In his pretrial motions, Mr. Roach failed to identify any of these three
    topics for cross-examination.
    In his first motion, he argued that he should be allowed to question Ms. Santillanes
    14
    about her deal with the Government. But he did not mention the length of her potential
    sentence under 18 U.S.C. § 1591(a)(1) as a cross-examination topic. 9 In his other three
    motions, he argued that he should be able to cross-examine Ms. Santillanes about her
    prior and current participation in prostitution under his constitutional right to
    confrontation, but he did not mention any of the three topics he raises on appeal. 10
    Although Mr. Roach is correct that he need not “specifically mention[] the
    Confrontation Clause” when it is apparent from the context, Aplt. Br. at 40; see 
    Adams, 271 F.3d at 1241
    , he must also assert the particular topic for cross-examination, see
    United States v. Summers, 
    414 F.3d 1287
    , 1297 n.7 (10th Cir. 2005) (preserving the
    9
    Moreover, he did not mention his right to confrontation under the Sixth
    Amendment as a ground for cross-examination about her deal.
    Mr. Roach cites United States v. Szabo, 
    789 F.2d 1484
    (10th Cir. 1986), to argue
    that he sufficiently preserved the constitutional argument in his first pretrial motion, but
    Szabo is distinguishable. In Szabo, the defendant had filed a motion in limine arguing
    that a government witness’s statements “ha[d] no indicia of reliability and [did] not
    provide the functional equivalent of cross-examination.” 
    Id. at 1486.
            We addressed his Confrontation Clause argument on appeal because “the
    constitutional issue was at least arguably raised at one time during the proceedings below,
    by way of the motion in limine,” 
    id. at 1487,
    in that it contained the phrase “indicia of
    reliability,” the Confrontation Clause standard at the time for admitting hearsay evidence
    for an unavailable declarant.
    Here, Mr. Roach’s motion in limine did not “arguably raise[]” a Confrontation
    Clause claim with respect to the length of sentence. It not only failed to mention the
    Confrontation Clause or its underlying standard, it also did not mention the length of the
    sentence as a topic for cross-examination.
    10
    As mentioned above, the three motions requested the opportunity to cross-
    examine Ms. Santillanes about (1) her promoting prostitution in the present case and
    previously in the states of Arizona, New Mexico, and Texas; (2) prostituting an
    individual in a related case; (3) her conviction for prostitution in Arizona; (4) prostituting
    herself while living with Mr. Roach; and (5) answering phone calls for Mr. Roach about
    D.G.
    15
    constitutional argument by demanding cross-examination of co-defendant’s hearsay
    statement at trial); United States v. Szabo, 
    789 F.2d 1484
    , 1487 (10th Cir. 1986)
    (preserving the constitutional argument by requesting cross-examination of
    co-conspirator’s hearsay statements in a motion in limine). In his pretrial motions, Mr.
    Roach failed to raise the length of Ms. Santillanes’s potential sentence, the alleged lies to
    her pretrial services officer, and the alleged prepaid card scheme.
    When Mr. Roach did raise these issues at trial, he failed to state a Confrontation
    Clause ground on which the court should permit the cross-examination. Indeed, Mr.
    Roach concedes that he “did not mention the Confrontation Clause at trial,” Aplt. Reply
    Br. at 3, but argues he sufficiently raised his constitutional arguments in his pretrial
    motions. He claims that he “repeatedly stress[ed] . . . the constitutional basis for his
    requests for cross-examination of Ms. Santillanes on various topics,” and that any
    restriction on such questioning “would violate the Confrontation Clause.” Aplt. Br.
    at 39-40. We disagree. Although he mentioned the Confrontation Clause in his second
    set of pretrial motions, he neglected to mention the three topics for cross-examination in
    any of his pretrial motions. It was therefore not “apparent” when he pursued cross-
    examination on these topics at trial that he was relying on the Confrontation Clause.
    
    Adams, 271 F.2d at 1241
    . 11
    11
    Mr. Roach also argues that “the combination of Mr. Roach’s frequent pretrial
    assertions of his constitutional right to cross-examination, the district court’s recognition
    of that right and Mr. Roach’s objections to curtailing his cross-examination during trial
    preserved the Confrontation Clause issues.” Aplt. Br. at 41. But because his pretrial
    motions failed to identify any of the cross-examination topics he wished to pursue at trial
    and now on appeal, and because he failed to object based on confrontation regarding
    16
    In sum, because Mr. Roach neither mentioned the three topics in his pretrial
    motions nor the Confrontation Clause at trial, he forfeited his arguments below.
    b. Mr. Roach fails to argue plain error on appeal
    Mr. Roach fails to argue plain error on appeal. He therefore has waived his
    Confrontation Clause arguments about the three lines of questioning and we do not
    consider them further. See 
    Solomon, 399 F.3d at 1238
    ; 
    MacKay, 715 F.3d at 831
    .
    Rules of Evidence
    Mr. Roach argues “even assuming arguendo [he] did not preserve the cross-
    examination restrictions as constitutional issues, he preserved them for non-constitutional
    review under the abuse-of-discretion standard.” Aplt. Reply Br. at 4. He contends the
    district court abused its discretion under the Federal Rules of Evidence when it prevented
    him from cross-examining Ms. Santillanes on the three topics.
    Although we question whether Mr. Roach adequately preserved his
    nonconstitutional objections, we need not address that issue nor whether the district court
    abused its discretion. Even assuming the district court abused its discretion, any error
    was harmless.
    Legal Background
    “A party may claim error in a ruling to . . . exclude evidence only if the error
    affects the substantial right of the party . . . .” Fed. R. Evid. 103(a). “The rule does not
    these topics at trial, we do not discern an adequate contextual ground, and certainly not a
    “clear” one, 
    Martinez, 776 F.2d at 1485
    , for Mr. Roach to overcome his forfeiture of his
    Confrontation Clause arguments.
    17
    purport to change the law with respect to harmless error.” Fed. R. Evid. 103(a) advisory
    committee’s note to 1972 proposed rules.
    “We will not reverse a defendant’s conviction on the basis of a district court’s
    erroneous admission [or exclusion] of evidence if the error was harmless to the
    defendant.” United States v. Kupfer, 
    797 F.3d 1233
    , 1243 (10th Cir. 2015); see United
    States v. Irving, 
    665 F.3d 1184
    , 1209 (10th Cir. 2011) (applying to excluded evidence).
    “A non-constitutional error is harmless unless it had a ‘substantial influence’ on the
    outcome or leaves one in ‘grave doubt’ as to whether it had such effect.” United States v.
    Rivera, 
    900 F.2d 1462
    , 1469 (10th Cir. 1990) (en banc) (quoting Kotteakos v. United
    States, 
    328 U.S. 750
    , 765 (1946)). “To make this assessment, we review the entire record
    de novo, examining the context, timing, and use of the erroneously admitted [or
    excluded] evidence at trial and how it compares to properly admitted evidence.” 
    Kupfer, 797 F.3d at 1243
    (quotations omitted). The government bears the burden to show that a
    nonconstitutional error is harmless by a preponderance of the evidence. See United
    States v. Jones, 
    818 F.3d 1091
    , 1101 (10th Cir. 2016).
    Analysis
    Mr. Roach argues the district court’s limitations on cross-examination had a
    “substantial influence on the verdict.” Aplt. Br. at 55. But for three reasons, the
    18
    Government has demonstrated that the limitations—individually or cumulatively 12—did
    not substantially influence the outcome of the case. 13
    First, Mr. Roach challenged Ms. Santillanes’s credibility throughout the cross-
    examination. Defense counsel questioned her about her past methamphetamine use and
    how she was still testing positive for drugs a year after charges had been brought in this
    case. He also asked her about “not telling [Mr. Roach] that you were actively
    prostituting” when she was romantically involved with him, which “was a pretty big lie,
    right?” ROA, Vol. III at 403. Most important, he inquired about the deal she made with
    the Government to testify. Although the district court blocked questions about the length
    of the potential sentence, counsel was able to ask about her charges being dropped in
    return for her testimony.
    Second, Mr. Roach called two witnesses to impeach Ms. Santillanes’s character
    for truthfulness. He questioned Vanessa Baca, who “ha[s] children with [Mr. Roach’s]
    12
    To the extent Mr. Roach attempts to present a cumulative error argument
    regarding the restrictions on the three lines of questioning, “we aggregate all the errors
    that we have found to be harmless and determine whether their cumulative effect on the
    outcome of the trial mandates reversal.” United States v. Anaya, 
    727 F.3d 1043
    , 1060-61
    (10th Cir. 2013) (quotations omitted). For the reasons presented above, we conclude that
    any evidence-rules errors, considered individually or together, did not substantially affect
    the outcome of the trial. See 
    id. at 1061.
           13
    The Government primarily argues that any constitutional error—as opposed to
    nonconstitutional error—was harmless. As it recognizes, the standard for a harmless
    constitutional error is whether we are “able to declare a belief that it was harmless
    beyond a reasonable doubt.” 
    Rivera, 900 F.2d at 1470
    (quoting Chapman v. California,
    
    386 U.S. 18
    , 24 (1967)). This standard requires more from the Government than showing
    a nonconstitutional error was harmless.
    19
    cousin,” 
    id. at 639,
    about her “opinion as to [Ms. Santillanes’s] truthfulness,” 
    id. at 644.
    She responded that Ms. Santillanes was not truthful. Similarly, he asked Christopher
    Baca, Mr. Roach’s former roommate, a similar question, and he gave the same answer.
    See 
    id. at 661-62.
    Third, even assuming the blocked cross-examination would have put Ms.
    Santillanes’s credibility into further doubt, it would not have substantially influenced the
    outcome of the case. The jury had ample evidence to convict Mr. Roach without her
    testimony. Under 18 U.S.C. § 1591(a)(1), the Government needed to prove that Mr.
    Roach knowingly “recruit[ed], entice[d], harbor[ed], transport[ed], provide[d],
    obtain[ed], advertise[d], maintain[ed], patronize[d], or solicit[ed]” D.G., knowing that
    “means of force, threats of force, fraud, [or] coercion” would be used to “cause [her] to
    engage in a commercial sex act.” 18 U.S.C. § 1591(a)(1). 14 D.G. described incidents in
    14
    Section 1591(a) reads in full:
    (a) Whoever knowingly—
    (1) in or affecting interstate or foreign commerce, or
    within the special maritime and territorial jurisdiction
    of the United States, recruits, entices, harbors,
    transports, provides, obtains, advertises, maintains,
    patronizes, or solicits 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, except where the act constituting the violation of
    paragraph (1) is advertising, 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
    20
    which Mr. Roach attacked or threatened her. For example, she testified that when he
    learned she had been speaking with others on Facebook, he drove her to the outskirts of
    Albuquerque. With a gun in his lap, he told her that he was disappointed with her
    because she was talking to “a bunch of people.” ROA, Vol. III at 502-03. Mr. Roach
    then slapped her face “multiple” times and warned that, if she left him, he would hurt one
    of her family members. 
    Id. at 504-05.
    Mr. Roach disputed these episodes, but he did
    testify to an occurrence when he hit D.G. He admitted to “slapp[ing] her with an open
    hand once across her face,” 
    id. at 706-07,
    because he believed that she was “still doing
    side dates,” 
    id. at 705.
    The evidence thus showed that Mr. Roach used violence to coerce
    D.G. into prostitution.
    Even if we “are not totally free from doubt about whether” the limitations on
    cross-examination “may have had some influence on the outcome of the case,” “we do
    not have grave doubt that the errors,” alone or cumulatively, “had a substantial effect on
    the outcome.” United States v. Charley, 
    189 F.3d 1251
    , 1270 n.29 (10th Cir. 1999)
    (“Grave doubt, by definition, does not refer to every level of doubt, and substantial
    influence, by definition, does not mean any or some influence.”). Assuming that the
    district court abused its discretion in limiting cross-examination, any errors were
    harmless because they did not have a substantial influence in the outcome of the case.
    be used to cause the person to engage in a commercial sex
    act, or that the person has not attained the age of 18 years and
    will be caused to engage in a commercial sex act, shall be
    punished as provided in subsection (b).
    18 U.S.C. § 1591(a).
    21
    III. CONCLUSION
    Mr. Roach’s challenge on appeal to the district court’s foreclosure of his three
    lines of cross-examination fails. He has waived his Confrontation Clause arguments, and
    any error under the rules of evidence was harmless. We uphold Mr. Roach’s conviction
    and affirm the district court’s judgment.
    22