Keith A. Moore v. United States ( 2015 )


Menu:
  • Notice: This opinion is subject to formal revision before publication in the
    Atlantic and Maryland Reporters. Users are requested to notify the Clerk of the
    Court of any formal errors so that corrections may be made before the bound
    volumes go to press.
    DISTRICT OF COLUMBIA COURT OF APPEALS
    No. 12-CF-778
    KEITH A. MOORE, APPELLANT,
    V.
    UNITED STATES, APPELLEE.
    Appeal from the Superior Court
    of the District of Columbia
    (CF3-11041-11)
    (Hon. Ann O‟Regan Keary, Trial Judge)
    (Argued September 25, 2014                                 Decided April 30, 2015)
    Justin Murray, Public Defender Service, with whom James Klein, Samia
    Fam, and Shilpa S. Satoskar, Public Defender Service, were on the briefs, for
    appellant.
    Patricia A. Heffernan, Assistant United States Attorney, with whom Ronald
    C. Machen Jr., United States Attorney, Elizabeth Trosman, John P. Mannarino,
    and Holly Shick, Assistant United States Attorneys, were on the brief, for appellee.
    Before WASHINGTON, Chief Judge, GLICKMAN, Associate Judge, and PRYOR,
    Senior Judge.
    Opinion for the court by Associate Judge GLICKMAN.
    Dissenting opinion by Senior Judge PRYOR at page 30.
    2
    GLICKMAN, Associate Judge:         Appellant Keith Moore was convicted of
    robbing Lorenzo Thomas at gunpoint of over $1,000 in cash, and of other, related
    crimes. The theory of Moore‟s defense at trial was that Thomas never had such a
    large sum in his possession and that he fabricated the robbery in a desperate ploy to
    forestall the imminent revocation of his probation on account of his inability to pay
    court-ordered restitution. It therefore was important to the government‟s case to
    show that Thomas was not lying, and hence to explain how he came to possess
    over $1,000 in cash at the time of the alleged robbery. In doing so, the government
    had an obstacle to overcome: While Thomas testified at trial that the money
    allegedly stolen from him came from a tax refund and gambling proceeds, he
    previously had said otherwise and lied about the source of the funds. For this and
    other reasons, Thomas‟s credibility was a central issue at trial.
    Prior to trial, to confirm that he in fact had received a tax refund, Thomas
    gave his 2010 federal tax return to the prosecutor, who in turn provided it to
    Moore‟s defense counsel and the court. In doing so, the prosecutor flagged the fact
    that Thomas had obtained a sizable tax credit and refund—over three thousand
    dollars—by claiming his twelve-year-old sister as his dependent. The prosecutor
    stated that she had discussed this with Thomas before he testified in the grand jury,
    and that “there was no understanding between him [and] the government about
    3
    whether claiming his sister as a dependent was appropriate.”         Based on this
    disclosure and additional information indicating that Thomas was not entitled to
    the tax credit, Moore sought to cross-examine Thomas at trial about whether he
    had committed tax fraud—primarily in order to impeach Thomas‟s veracity and
    demonstrate that he was capable of fabricating the robbery in this case for a
    monetary gain, and secondarily to explore Thomas‟s motive to curry favor with the
    prosecution inasmuch as he had not been granted immunity from prosecution for
    tax fraud. However, the trial court, doubting that the inquiry would be probative of
    Thomas‟s veracity as a witness, and concerned that a digression into tax law would
    confuse the jury, precluded the proposed cross-examination in its entirety. On
    appeal, Moore contends that the court exercised its discretion erroneously in so
    ruling, and that we cannot deem the error harmless. We agree, and we therefore
    reverse Moore‟s convictions and remand for a new trial.
    I.
    The alleged robbery occurred on June 12, 2011, and was described at trial by
    Thomas and his friend Dale Bolton.1 That afternoon, they testified, they had been
    1
    Bolton, who initially had claimed he was high on PCP and did not
    remember what had happened, was at trial a reluctant, hostile, and most unreliable
    (continued…)
    4
    gambling at the home of “Little Tey.” Thomas said he had arrived with a “couple
    hundred dollars” from his tax refund and some money from his mother, and that he
    won several hundred dollars, so that he had $1,066 by the time the gambling
    ended.    Bolton, however, testified that Thomas had lost some money while
    gambling that afternoon, and was complaining about it.2
    Upon leaving Little Tey‟s house, Thomas and Bolton joined Moore, Ronald
    Kent, and their friend Demario Kennedy, and the group decided to go in Kent‟s
    SUV to a liquor store where Thomas intended to purchase a $1,100 money order.
    This was a matter of some urgency for Thomas, because he was on probation in
    connection with his conviction in 2005 on four counts of armed robbery, and he
    needed the money order to make an overdue payment of restitution and avoid
    having his probation revoked at a violation hearing that happened to be scheduled
    the following day. On the way, the group stopped in the parking lot of the
    apartment complex where Moore‟s mother lived. Moore left the SUV to get his
    (continued…)
    witness whose testimony was riddled with inconsistencies. On cross-examination,
    he claimed he had tailored his testimony to what he understood the prosecutor
    wanted him to say because she had “threatened [him] with perjury.”
    2
    According to Bolton, Moore was present at Little Tey‟s house too, along
    with his friend Ronald Kent. Moore may or may not have been gambling there.
    5
    brother Darrell while Bolton went to buy marijuana and PCP. Thomas, who
    remained in the SUV, saw Moore hand his cell phone to Darrell.
    The robbery allegedly took place when Moore returned to the SUV with his
    brother. Although their accounts differed as to the details, Thomas and Bolton
    testified that Moore pulled a gun on Thomas and, with his brother‟s assistance,
    robbed him of his money, wallet, and cell phone. Moore then directed Thomas to
    leave the area on foot, which he did. As Thomas departed, he saw Kent pull over
    in the SUV and pick up Moore.3
    Thomas fled to a nearby church, where he summoned the police and
    reported that Moore and his brother had just robbed him with a silver handgun.
    After broadcasting a lookout for Kent‟s SUV, the officers and Thomas went to the
    parking lot where Thomas said the robbery took place. They found Thomas‟s
    wallet lying on the ground. Any money that had been in it was missing. Thomas
    and the officers then located Bolton, who had gone home, but he was unwilling to
    speak with them.
    3
    Bolton testified that Moore proceeded to rob him as well, taking about $30
    from his pockets. However, the jury acquitted Moore of robbing Bolton.
    6
    Meanwhile, not far away, other police officers spotted Kent‟s SUV and
    followed it. As they did so, one of the officers saw a handgun thrown out of the
    right rear passenger window of the SUV. The police later recovered a black
    handgun on the ground in that vicinity. When the police succeeded in stopping the
    SUV, they took its four occupants—Moore (who was sitting in the right rear
    passenger seat), his brother, Kent, and Kennedy—into custody.            In separate
    showups, Thomas identified each of them. Moore, he stated, was the person who
    held the gun to his head while his brother went through his pockets. The police
    found $943 on Moore‟s person (all but $20 or $30 of it in his sock) and $61 on two
    of the other passengers.4 From Moore‟s brother, the police took a blue Cricket cell
    phone, which Thomas identified as his.5
    4
    In total, this was $62 less than Thomas claimed to have lost. The
    government argued that the “missing” $62 might have been spent to buy the two
    bottles of cold vodka and two bottles of cold beer that the police also found in the
    SUV.
    5
    The parties disagreed at trial as to whether the evidence established that the
    cell phone really belonged to Thomas. The police allowed Thomas to keep the
    phone, and by the time of trial he said he no longer had it or remembered the
    phone‟s number. A detective testified that he allowed Thomas to have the phone
    because Thomas was able to unlock it by entering a code, but on cross-examination
    the detective appeared to acknowledge that he really did not know the phone was
    locked or what Thomas actually did to “unlock” it. The detective also did not
    know the number of the phone or whether that number was registered to Thomas.
    7
    Thomas subsequently was shown a photograph of the black handgun
    suspected of having been thrown from Kent‟s SUV. At first he said he did not
    recognize it and recalled that Moore‟s gun was a different color (silver). However,
    after continuing to examine the photo, Thomas noticed that the gun in the photo
    was a Colt. He stated that Moore‟s gun was a Colt and then declared that the gun
    in the photo was the gun Moore used to rob him. At trial, Thomas was shown the
    black handgun and identified it as the one Moore used, even though he earlier had
    said the weapon was silver.      The defense challenged the credibility of this
    identification.6
    In addition to the foregoing evidence, the prosecution introduced a recording
    of a telephone call Moore made to someone named Tracy three days after his
    arrest.7 During the call, Moore told Tracy “I‟m gonna go ahead and take this shit
    for everybody so them can come home,” “I sit up all night crying about [Thomas]
    doing some shit like this,” and “if it was anybody else,” the police would not have
    been called, “and I wouldn‟t even be right here man.” The government contended
    6
    The defense also disputed whether this or any gun actually had been
    thrown from the SUV.
    7
    The parties stipulated that Moore and Tracy both knew the call was being
    recorded. Evidently the call was made from the D.C. Jail.
    8
    that these statements amounted to inculpatory admissions, while the defense
    argued that Moore was merely expressing his anger at Thomas for falsely accusing
    him, his brother, and his friends of robbery.
    The theory of Moore‟s defense at trial was that Thomas had fabricated the
    robbery in order to get from Moore the money he needed to fulfill his overdue
    restitution obligation at his probation violation hearing the following day, or at
    least to create an acceptable excuse for his inability to do so.8 One thing that lent
    some support to that theory, and that undercut Thomas‟s credibility, was his
    dishonesty and inconsistency as to the source of the cash that Moore purportedly
    stole from him. When Thomas was interviewed by the police on June 12, and for
    several weeks afterward, he claimed to have earned most of the allegedly stolen
    $1,066 working as a server at P.F. Chang‟s (a restaurant), and that his mother had
    given him the rest. But after the prosecutor contacted P.F. Chang‟s and learned
    that Thomas had stopped working there in January, Thomas admitted having lied
    about the source of the money. He then told the prosecutor that much of the
    money actually came from his 2010 tax refund. Later, and at trial, he said he won
    a lot of the money gambling at Little Tey‟s on the afternoon of the robbery.
    8
    As to Bolton, the defense theory was that he had echoed his friend
    Thomas‟s story of a robbery only to avoid being prosecuted for perjury.
    9
    Thomas explained that he had lied about the source of the money initially because
    he did not want to be “judged.”9
    Sometime before trial, Thomas provided his 2010 federal tax return to the
    prosecutor to confirm that he actually had received a tax refund as he had asserted.
    The prosecutor furnished a copy of the return to Moore‟s defense counsel and the
    court. In conjunction with that disclosure, the prosecutor highlighted the fact that
    Thomas had claimed his twelve-year-old sister as his dependent and, with respect
    to that fact, advised as follows:
    Mr. Thomas agreed that there was no understanding
    between him or [sic] the government about whether
    claiming his sister as a dependent was appropriate. Mr.
    Thomas also had an opportunity to speak to his lawyer ...
    about this matter. Detective Peter Shaw was also present
    when I discussed this issue with Mr. Thomas, and this
    discussion took place before Mr. Thomas testified in the
    grand jury. Mr. Thomas said his mother did not claim his
    sister as a dependent in 2010.
    The tax return, which Thomas filed with the aid of a paid tax preparer,
    showed that Thomas‟s adjusted gross income (“AGI”) for 2010 was $9,245 and
    that he was entitled to a federal tax refund of $4,387. This refund was entirely
    9
    Thomas testified at trial pursuant to promises of immunity protecting him
    from prosecution for illegal gambling and lying about the source of his stolen
    money.
    10
    attributable to three credits,10 the largest of which was an Earned Income Credit
    (“EIC”) of $3,050.11    According to the accompanying Paid Preparer‟s Earned
    Income Credit Checklist, Thomas claimed the EIC by representing (1) that his
    twelve-year-old sister E.T. lived with him and met the other criteria listed in the
    checklist for Thomas to claim her as his “qualifying child,”12 and (2) that no one
    else was eligible to claim E.T. as his or her “qualifying child” under those criteria.
    The latter representation was crucial, because if more than one taxpayer could have
    claimed E.T. as a qualifying child, there were special “tiebreaker rules” (referenced
    in the EIC checklist) that determined who would have been allowed to do so.
    Those tiebreaker rules provide that if an individual‟s parents could claim her as a
    qualifying child but neither parent does so, “such individual may be claimed as the
    qualifying child of another taxpayer but only if the adjusted gross income of such
    10
    Thomas had zero taxable income for 2010, so his refund equaled the sum
    of his tax credits.
    11
    The other two credits were an Additional Child Tax Credit of $937 and a
    Making Work Pay Credit of $400. No issue has been raised about the propriety of
    these two credits. It would appear, however, that Thomas‟s entitlement to the
    Additional Child Tax Credit would be subject to the same question (whether
    Thomas could claim his sister as his “qualifying child”) that appellant raises with
    respect to the EIC. See 26 U.S.C. § 24 (2014).
    12
    A “qualifying child” is defined, essentially, as a son, daughter or sibling of
    the taxpayer (or a descendent of any such relative) who had “the same principal
    place of abode” as the taxpayer for more than half of the taxable year, and who
    meets certain age and other requirements. See 26 U.S.C. § 152 (c), (f) (2014).
    11
    taxpayer is higher than the highest adjusted gross income of any parent of the
    individual.”13 If the taxpayer‟s AGI is not higher than that of the child‟s parent,
    the taxpayer may not claim the child as his dependent even if the parent declines to
    do so. The representation that no one but Thomas could claim his sister as a
    qualifying child rendered it unnecessary for Thomas and the paid preparer to apply
    this tiebreaker rule in filling out the EIC checklist—and they did not do so.
    Before trial, Moore‟s defense counsel informed the court that she intended
    to cross-examine Thomas about whether he had taken the earned income credit
    dishonestly, i.e., knowing he was not eligible for it, and about his discussions with
    the prosecutor concerning that issue. Counsel explained that she believed Thomas
    must have known he was not entitled to claim his sister as his dependent for
    purposes of the EIC because the sister (like Thomas himself) lived with their
    mother, Terria McCallister, and Ms. McCallister‟s adjusted gross income likely
    was greater than Thomas‟s paltry AGI because she was a federal government
    employee. Ms. McCallister therefore was entitled to claim Thomas‟s sister as her
    qualifying child and, counsel inferred, she had priority over Thomas under the
    13
    26 U.S.C. § 152 (c)(4)(C) (emphasis added).
    12
    tiebreaker rules.14 Counsel acknowledged that the tax return had been prepared by
    a paid preparer rather than Thomas himself, but she pointed out that Thomas still
    had to provide the preparer with the necessary factual information, which Thomas
    evidently had “misrepresented” in some way.15
    The prosecutor agreed with defense counsel‟s understanding that Thomas
    was entitled to claim his sister as his qualifying child only if his AGI was greater
    than that of his mother. After inquiring of Ms. McCallister as to why she had not
    claimed the EIC on her own return, the prosecutor reported that she said “she was
    present when … Thomas went to the accountant to prepare the [2010] tax returns
    last year, and that no one asked her whether she was employed”—though, in fact,
    14
    Defense counsel did not point out the specific representation on the EIC
    checklist that no one other than Thomas could claim his sister as a qualifying
    child—a statement that seems to have been false, as it is undisputed that Thomas‟s
    mother could have done so. Rather, counsel surmised that the return preparer,
    applying the tiebreaker rule, might have asked Thomas, “does your mom work
    because [if] she makes more than you[,] [y]ou can‟t claim [the EIC],” and that
    Thomas might have lied and said his mother did not work.
    15
    In filling out the Paid Preparer‟s Earned Income Credit Checklist, the
    preparer represented that he had completed it “based on information provided by
    the taxpayer” or otherwise “reasonably obtained,” and that he did not know or have
    reason to know that the information used to determine the taxpayer‟s eligibility for
    the EIC was incorrect.
    13
    she was a federal government employee in 2010. The prosecutor did not say what,
    if anything, Ms. McCallister had said about her adjusted gross income in 2010.
    Defense counsel argued that Moore was entitled to cross-examine Thomas
    about his possibly fraudulent tax return and his related discussions with the
    prosecutor for two reasons:    (1) to impeach Thomas‟s credibility because his
    misrepresentations in his tax return were prior dishonest acts probative of his
    character for untruthfulness and hence his lack of veracity as a witness; and (2) to
    show that Thomas had a testimonial bias because his continuing exposure to
    prosecution or revocation of his probation on account of his alleged tax fraud
    provided him with a motive to curry favor with the prosecutor.16 The prosecutor
    objected to the proposed cross-examination on the ground that it would “confuse
    the jury and leave them with the impression that [Thomas] had done something
    wrong when no one would be able to prove … what the correct interpretation of
    the tax law is.”17
    16
    The immunity from prosecution that Thomas was given did not extend to
    prosecution for tax fraud.
    17
    The prosecutor previously had noted the “problem” that, in order to prove
    that Thomas claimed the EIC improperly, the defense might have to present
    extrinsic evidence in the form of testimony from Thomas‟s mother or a tax expert.
    Defense counsel agreed that she would be precluded from presenting such extrinsic
    evidence on the point, and that she would be stuck with Thomas‟s answers on
    (continued…)
    14
    Ultimately, the trial court decided to preclude all cross-examination of
    Thomas relating to his allegedly falsified tax return. Observing that Thomas was
    “not a tax expert” and “not the person who prepared the tax form,” the court
    reasoned that even if he had claimed the earned income credit dishonestly, “[t]his
    prior act ... would not be as relevant” as “many [other] areas for cross-
    examination” available to the defense in this case, “including [other] prior
    dishonesty of the witness.”       Additionally, after characterizing the issue of
    Thomas‟s right to claim the tax credit as “convoluted,” “difficult to explain,” and
    “a matter of interpretation of tax law,” the court anticipated that the proposed
    cross-examination would “leave the jury with only the ability to speculate” as to
    whether “this is against the law,” and would “distract[] [the jury] “from the really
    relevant issue, whether or not [Thomas is] truthful in his testimony.” 18
    (continued…)
    cross-examination, but she argued that Thomas might “tell the truth” and admit
    that he had made misrepresentations in his tax return. Furthermore, counsel
    argued, at the very least she should be allowed to cross-examine Thomas with
    respect to his bias by eliciting what the prosecutor said to him about his tax return
    before he testified in the grand jury.
    18
    In focusing on whether the proposed cross-examination would be
    illuminative on the issue of Thomas‟s veracity, the court did not separately address
    whether it would be probative of his testimonial bias.
    15
    Thomas‟s credibility proved to be the central issue at trial. At the outset of
    her closing argument, the prosecutor acknowledged that “the real issue is whether
    or not you can believe Dale Bolton and Lorenzo Thomas.” Thomas was much the
    more important of the two. Conceding that the jurors might not “like” Thomas in
    light of “some of the things that he did in his past,” the prosecutor urged them to
    believe him because he “honestly [took] ownership” of his past misdeeds; “his
    story never changed, with the exception of the fact of where his money came
    from”; and the evidence corroborated his account of having been robbed of over a
    thousand dollars by Moore and his brother.
    Moore‟s defense counsel, asserting that “[t]his case is about one man,
    Lorenzo Thomas,” vigorously attacked him as “a witness who went from a
    supposed robbery victim to a lying, egotistical manipulator right before our very
    eyes.”     Counsel argued that Thomas fabricated his story of a robbery out of
    desperation, after “he lost all of his money” gambling, because he was facing
    imminent revocation of his probation and twelve years in prison and his “time was
    running out.”      Counsel disparaged the evidence that supposedly corroborated
    Thomas and emphasized that Thomas was contradicted or inconsistent on key
    points, including the source of the purportedly stolen money, whether he won or
    16
    lost money gambling at Little Tey‟s, and whether he truly recognized the handgun
    recovered by the police.
    In rebuttal, the prosecutor challenged the defense characterization of
    Thomas as a “master manipulator” and insisted that “the only lie he told was where
    he got his money from. One lie.” “[A]sk yourselves,” the prosecutor exhorted the
    jury, “is he someone who is capable of manipulating this whole thing?” The jury
    found the case a difficult one. Its deliberations extended over four days, during
    which it requested the court to provide “more detailed explanation of beyond a
    reasonable doubt,” reported itself “unable to come to agreement regarding the
    verdict,” and declared that it was “hung on a number of matters.” Ultimately, the
    jury found Moore guilty of Thomas‟s armed robbery but not guilty of Bolton‟s
    armed robbery.19
    19
    Moore was tried together with his brother Darrell and Ronald Kent. It is
    possible that the jury‟s difficulties primarily related to them. The jury found
    Darrell Moore guilty only of misdemeanor receiving stolen property (that of
    Thomas). It found Kent guilty of being an accessory after the fact to assault with
    intent to commit robbery while armed.
    17
    II.
    Moore contends the trial court abused its discretion when it precluded him
    from impeaching Thomas‟s veracity and showing his bias to curry favor with the
    prosecutor through cross-examination about his misrepresentations in his 2010 tax
    return and his confrontation with the prosecutor about those misrepresentations.
    The government argues that we should affirm the trial court because Moore did not
    proffer a sufficient factual foundation for the veracity and bias inquiries he sought
    to pursue, and that any error in foreclosing those inquiries was harmless in view of
    the strength of the prosecution case and the otherwise full opportunity Moore had
    to cross-examine Thomas. As the case has been presented to us, we therefore may
    determine whether Moore is entitled to a new trial by focusing primarily on two
    questions—whether he made an adequate proffer to justify embarking on his
    proposed cross-examination of Thomas and, if so, whether the court‟s preclusion
    of that cross-examination was nonetheless harmless. We conclude that Moore‟s
    proffer was sufficient for both desired areas of inquiry and that at least insofar as
    the interdiction of his attempt to impeach Thomas‟s veracity is concerned, we
    cannot deem the error harmless.20
    20
    We therefore find it unnecessary to address Moore‟s contention (which the
    government disputes) that reversal is required because the court curtailed his cross-
    (continued…)
    18
    A.
    It is well settled that a sufficient factual predicate is a prerequisite to the two
    types of cross-examination Moore sought to undertake in this case. We have held
    that “[a] witness may be cross-examined on a prior bad act that has not resulted in
    a criminal conviction only where (1) the examiner has a factual predicate for the
    question, and (2) the bad act bears directly upon the veracity of the witness in
    respect to the issues involved in the trial.”21 We likewise have held that “[i]n order
    to pursue a line of cross-examination suggesting that a witness is biased, a
    defendant must lay „a proper factual foundation.‟”22 The requirement of a factual
    (continued…)
    examination for a legally improper reason, to wit, that other available evidence of
    Thomas‟s lack of veracity and bias was “more relevant.”
    21
    Murphy v. Bonanno, 
    663 A.2d 505
    , 508-09 (D.C. 1995) (internal
    quotation marks and brackets omitted); accord Bennett v. United States, 
    763 A.2d 1117
    , 1122 (D.C. 2000). “[W]here such impeachment is permitted, evidence of the
    prior misconduct may be elicited only by cross-examination of the witness; it may
    not be proved by extrinsic evidence.” Sherer v. United States, 
    470 A.2d 732
    , 738
    (D.C. 1983).
    22
    McCraney v. United States, 
    983 A.2d 1041
    , 1052 (D.C. 2009) (quoting
    Scull v. United States, 
    564 A.2d 1161
    , 1164 (D.C. 1989)).
    19
    predicate “serves to prevent harassment of the witness, prejudice to the opposing
    party, confusion of the issues, and unnecessary waste of time[.]”23
    The trial court has discretion to determine whether a proffered factual
    predicate is sufficient, and the court properly exercises that discretion “by
    precluding cross-examination where the connection between the facts cited by
    defense counsel and the proposed line of questioning is too speculative to support
    the questions.”24       Nonetheless, the requirement of “a reasonable factual
    foundation” is a “fairly lenient one.”25 It simply calls for a “credible” good faith
    proffer of facts supporting a “genuine belief” or “well-reasoned suspicion” that the
    witness committed a veracity-impeaching bad act or is biased in the manner
    asserted; such a proffer, we have said, may be based on “plausible factual
    allegations or itself [may be] plausible within the framework of facts that neither
    party has contested.”26 The court has discretion in appropriate cases to test the
    23
    
    Id. 24 Id.
    (internal quotation marks and brackets omitted).
    25
    Clayborne v. United States, 
    751 A.2d 956
    , 963 (D.C. 2000) (internal
    quotation marks omitted).
    26
    
    Scull, 564 A.2d at 1164
    & 1164 n.4 (internal quotation marks omitted);
    see also 
    McCraney, 983 A.2d at 1052
    ; Grayton v. United States, 
    745 A.2d 274
    ,
    280 (D.C. 2000). We note that appellant does not claim constitutional error in the
    (continued…)
    20
    proffer, or allow the examiner to substantiate it, through a preliminary voir dire of
    the witness, which may be conducted outside the presence of the jury.27 Moreover,
    because “cross-examination is often genuinely exploratory rather than directly
    accusatory, [inasmuch as] counsel often cannot know in advance what an opposing
    party‟s witness may have to say,” the foundational requirement is “flexible as well
    as lenient. The more pointed and directly accusatory the examiner‟s question,
    the stricter the foundational requirement becomes, while a „very slight‟ basis is
    enough to support „nonaccusatory questions‟ on cross-examination.”28
    (continued…)
    preclusion of his prior bad act cross-examination (as opposed to the preclusion of
    his cross-examination for bias). “„[T]he confrontation clause mandates that the
    trial court give [the] defendant leave to cross-examine about [a] prior [false] claim
    only where it is „shown convincingly‟ that the prior claim is false.‟” Garibay v.
    United States, 
    72 A.3d 133
    , 138 (D.C. 2013) (quoting Roundtree v. United States,
    
    581 A.2d 315
    , 321 (D.C. 1990)).
    27
    See, e.g., 
    Garibay, 72 A.3d at 139
    (holding that where the factual proffer
    raised the possibility but did not show convincingly that the complainant
    previously had made a false allegation of sexual assault, the trial court should have
    permitted a “limited exploratory voir dire … to determine whether the witness
    fabricated an accusation”); 
    McCraney, 983 A.2d at 1052
    n.31 (“The judge clearly
    had the discretion to conduct a voir dire examination of Mascall outside the jury‟s
    presence as an aid to determining whether there might be grounds for the requested
    bias cross-examination.”) (citing Newman v. United States, 
    705 A.2d 246
    , 259
    (D.C. 1997)); 
    Roundtree, 581 A.2d at 324
    .
    28
    
    Clayborne, 751 A.2d at 963
    (citation omitted); see also 
    Scull, 564 A.2d at 1165
    n.6 (“[A]n important purpose of cross-examination is exploration, and the
    trial court must give counsel some leeway to probe for information that she cannot
    prove before commencing cross-examination.”).
    21
    Evaluated in accordance with these principles, Moore‟s proffer passed
    muster. As to whether Thomas took the $3,050 earned income credit in his 2010
    federal tax return by dishonestly claiming his sister as his qualifying child, the
    proffer included the following facts and circumstances: First, the tax return was
    prepared by and with the assistance of a professional tax preparer. Second, the
    preparer made a factual inquiry of Thomas (memorialized in the preparer‟s
    checklist) to determine whether he satisfied the legal requirements for claiming his
    sister as his qualifying child. Third, Thomas and his sister both resided with their
    mother.    Fourth, for that reason, their mother also met the initial criteria for
    claiming Thomas‟s sister as a qualifying child (as Thomas must have known).
    Fifth, under the “tiebreaker” rules, Thomas was permitted to claim his sister only if
    his adjusted gross income in 2010 exceeded his mother‟s AGI. Sixth, Thomas‟s
    AGI for the year was only $9,245.29 Seventh, as Thomas also surely knew, his
    mother was a federal government employee in 2010 and her AGI therefore almost
    certainly exceeded his.30    Eighth, Thomas therefore almost certainly was not
    entitled to claim his sister as his qualifying child. Ninth, in order to do so anyway,
    29
    That was the figure shown on the tax return, which had been furnished to
    the court. Moore‟s defense counsel misspoke in argument and said Thomas‟s AGI
    was $9,400. The difference is immaterial.
    30
    There was no reason to think otherwise. Moreover, the prosecutor, who
    was aware of the significance of the tiebreaker rule and had interviewed Ms.
    (continued…)
    22
    he evidently misrepresented the facts in some way to convince the tax preparer that
    he could claim his sister as his qualifying child and take the EIC.31
    Moreover, it was reasonable for defense counsel to conclude that if Thomas
    obtained his $3,050 tax credit (and tax refund) by this dishonest means, he
    committed an act of tax fraud.32 Such an act of fraud would have been probative of
    Thomas‟s lack of truthfulness and, more particularly, his willingness to lie for
    financial gain. Thus, the proffer adequately identified a prior bad act that bore
    directly upon Thomas‟s veracity in respect to the central issue at trial, which was
    (continued…)
    McCallister about her failure to claim Thomas‟s sister as her qualifying child, did
    not claim that her AGI was less than Thomas‟s in 2010. If that were truly so, one
    would think the prosecutor would have trumpeted the fact as a decisive rebuttal of
    Moore‟s proffer.
    31
    Indeed, as discussed above in footnote 14 and the accompanying text, a
    misrepresentation is apparent on the face of the preparer‟s checklist—to wit, that
    no one other than Thomas himself met the initial criteria for claiming his sister as a
    qualifying child. Because defense counsel did not mention this misrepresentation
    in her proffer (and no one ever pointed it out to the trial court), we do not consider
    it in evaluating the sufficiency of Moore‟s proffer. But we think counsel surely
    would have questioned Thomas about it had she been allowed to do so.
    32
    See generally 26 U.S.C. §§ 7201 et seq (2014) (federal tax crimes); e.g. 26
    U.S.C. § 7206 (2014) (“Any person who . . . willfully makes and subscribes any
    return. . . which contains or is verified by a written declaration that is made under
    the penalties of perjury, and which he does not believe to be true and correct as to
    every material matter . . . shall be guilty of a felony[.]”); 26 U.S.C. § 7207 (2014)
    (misdemeanor fraudulent tax filings).
    23
    whether he fabricated his robbery accusation to obtain money from Moore
    dishonestly. The act therefore would have been a permissible subject of cross-
    examination to impeach Thomas‟s credibility.33
    It is true, as the government argues, that the proffered facts and
    circumstances do not necessarily prove Thomas committed tax fraud. But they do,
    in our opinion, give rise to a quite reasonable suspicion that he did so. Defense
    counsel possibly could have confirmed that suspicion by questioning Thomas
    under oath about what he told the tax preparer and what he understood about his
    right to claim his sister as his qualifying child. At a minimum, the proffer was
    sufficient to entitle Moore to conduct a limited exploratory voir dire of Thomas in
    an effort to substantiate the suspicion that he had engaged in tax fraud. “It may
    33
    See Murphy v. Bonanno, 
    663 A.2d 505
    , 509-510 (D.C. 1995) (holding that
    trial court erred in precluding, on relevance grounds, cross-examination of plaintiff
    in action for assault and battery and trespass about prior acts of bank fraud and
    insurance fraud, as such acts “would certainly be probative of whether [the
    plaintiff‟s] present allegations to which she testified at length were worthy of
    belief”); see also Chnapkova v. Koh, 
    985 F.2d 79
    , 82 (2d Cir. 1993) (“Evidence
    that a witness has made false statements in a tax return is obviously a matter which
    affects the witness‟s credibility.”), abrogated on other grounds, Jaffee v. Redmond,
    
    518 U.S. 1
    (1996); United States v. Sullivan, 
    803 F.2d 87
    , 90-91 (3rd Cir. 1986)
    (“fraudulent replies” on witness‟s income tax forms held admissible to attack
    witness‟s credibility on cross-examination); United States v. Zandi, 
    769 F.2d 229
    ,
    236 (4th Cir. 1985) (stating that cross-examination of a witness about “false
    information” on his tax returns and other documents “bore on a relevant matter, i.e.
    his credibility, and was entirely appropriate”).
    24
    seem unlikely that [Thomas] would admit to having [falsified his tax return], or
    that [he] would reveal information establishing convincingly that [he] did so, but
    appellant was entitled to find out.”34 It is by no means an “improbable flight of
    fancy”35 to suppose that Thomas would have admitted having been dishonest in
    order to obtain a refund of a few thousand dollars, or that the jury would have
    disbelieved him if he had professed innocence without giving a persuasive
    explanation.
    Moore also proffered adequate grounds to support his bias theory of cross-
    examination. In addition to the foregoing facts suggesting that Thomas dishonestly
    obtained a tax credit and refund to which he was not entitled, the court was
    informed that (1) the prosecutor doubted it was “appropriate” for Thomas to claim
    his sister as his dependent, (2) with a detective present, the prosecutor raised this
    issue with Thomas and his attorney just before Thomas testified in the grand jury,
    and (3) the immunity from prosecution that Thomas was granted did not protect
    him from prosecution for tax fraud. This was enough of a factual predicate for the
    defense to question Thomas about whether his fear of being prosecuted for tax
    34
    
    Garibay, 72 A.3d at 139
    .
    35
    
    Scull, 564 A.2d at 1164
    .
    25
    fraud (or having his probation revoked on account of it, or even having to face a
    civil tax inquiry) gave him a motive to curry favor with the prosecutor that colored
    and influenced his testimony at trial adversely to Moore.36           Exposure of this
    motive, appellant suggests, would have helped explain why Thomas continued to
    “stand by his initial fabrication” even after he succeeded in avoiding the revocation
    of his probation on account of his failure to make restitution.37
    Accordingly, to the extent the trial court precluded the proposed cross-
    examination of Thomas because it considered Moore‟s factual proffer inadequate,
    or the subject matter not probative of Thomas‟s veracity or bias, we conclude that
    the court erred.
    The trial court was concerned that the cross-examination might be confusing
    and distracting to the jury, but it did not find that this danger so substantially
    outweighed the probative value of the proffered cross-examination as to warrant a
    36
    See 
    id. at 1165
    (“In evaluating the possibility of bias in adverse testimony,
    the objective likelihood of prosecution and the subjective intent of the government
    to prosecute are irrelevant; rather, the witness‟ subjective belief in the possibility of
    prosecution is central, since it is this belief that can produce bias.”).
    37
    Brief for Appellant at 24.
    26
    total preclusion of the questioning under Rule 403.38 The record, in our view,
    would not have supported such a finding. Straightforward questioning focused on
    whether Thomas made a knowing misrepresentation on his tax return, and on his
    discussion with the prosecutor concerning the propriety of his return, would not
    necessarily have posed a substantial risk of confusion, and there was no genuine
    dispute between the parties as to the material requirements of federal tax law. The
    court therefore could have addressed its legitimate concerns by such measures as
    requiring a preliminary voir dire of Thomas, imposing reasonable limits on the
    scope and character of his questioning, and properly instructing the jury on its
    consideration of his testimony.39 “The court would, of course, have had ample
    authority and discretion to control the cross-examination to protect [Thomas] from
    harassment and to keep the questioning relevant and within reasonable bounds.”40
    38
    See Johnson v. United States, 
    683 A.2d 1087
    , 1099 (D.C. 1996) (en banc)
    (adopting Federal Rule of Evidence 403).
    39
    See, e.g., Roundtree v. United 
    States, 581 A.2d at 323
    (explaining that
    even where a defendant has made a sufficient factual proffer to justify cross-
    examination into a witness‟s prior bad acts or bias, the trial court still has “wide
    latitude to „impose reasonable limits‟ on cross-examination „based on concerns
    about, among other things, harassment, prejudice, confusion of the issues, the
    witness‟ safety, or interrogation that is repetitive or only marginally relevant.‟”)
    (quoting Delaware v. Van Arsdall, 
    475 U.S. 673
    , 679 (1986)); 
    Scull, 564 A.2d at 1165
    (“Any potentiality of confusion to the jury may be eliminated by proper
    instructions.”).
    40
    
    Garibay, 72 A.3d at 139
    .
    27
    B.
    At least insofar as the defense was prevented from attempting to impeach
    Thomas‟s veracity with his putatively dishonest tax filing, we are not convinced
    that the erroneous ruling was harmless.41 We address this issue applying “the
    customary harmless error standard” for non-constitutional error.42       Under that
    standard, the burden is on the government to persuade us that “the judgment was
    not substantially swayed by the error,” meaning it is “highly probable” the error
    did not affect the jury‟s verdict.43 If the question of harmlessness is close enough
    41
    Were the record sparser than it is, we might consider remanding for the
    trial court to conduct a limited voir dire of Thomas in order to ascertain whether
    cross-examination actually would have borne out the suspicion that he dishonestly
    claimed his sister as his dependent. See Shorter v. United States, 
    792 A.2d 228
    ,
    236 (D.C. 2001) (holding that where trial court erred in preventing defendant from
    examining complainant about a prior allegation of sexual abuse, a remand was
    appropriate for the court to conduct a limited voir dire of the complainant in order
    to determine whether the allegation was in fact false); 
    Garibay, 72 A.3d at 140
    (same). If not, then we might find it easy to deem the error harmless. However,
    because we have discerned that Thomas‟s tax return reveals on its face an apparent
    material misrepresentation (the denial that anyone else, i.e., his mother, could have
    claimed his sister as a qualifying child), we do not consider such a step necessary
    or appropriate here. The existence of that apparent misrepresentation is sufficient
    by itself to establish that the requested cross-examination might have been
    successful in demonstrating Thomas‟s dishonesty to the jury.
    42
    Bennett v. United States, 
    763 A.2d 1117
    , 1125 & n.10 (D.C. 2000).
    43
    In re L.C., 
    92 A.3d 290
    , 299-300 (D.C. 2014) (quoting Kotteakos v.
    United States, 
    328 U.S. 750
    , 764 (1946)).
    28
    that the court finds itself “in virtual equipoise …, the court should treat the error …
    as if it affected the verdict.”44
    Harmlessness is a close question here, as the government‟s case against
    Moore was not a weak one, but it did depend crucially on the testimony and
    credibility of Thomas. Although Bolton also testified that Moore robbed Thomas,
    Bolton simply was not a credible accuser. To be sure, Thomas‟s account of the
    robbery was corroborated, and not just by Bolton; the jury readily could have
    found that Thomas was corroborated not only by the physical evidence found on
    Moore and at the scene of the alleged robbery, but as well by Moore‟s own
    statements in his recorded phone call to Tracy. But Thomas also was contradicted
    or inconsistent on important matters, including the source of his allegedly stolen
    money, whether he actually won or lost money gambling with Little Tey, and the
    color of the gun Moore allegedly used to rob him.           Moreover, Thomas was
    impeached with his past convictions, which included one for conspiracy to commit
    credit card fraud, and the jury was informed that at the time of trial he had pending
    charges for credit card theft and fraud. Impeachment of Thomas‟s truthfulness by
    showing that he had defrauded the federal government with his tax return could
    44
    Hinton v. United States, 
    979 A.2d 663
    , 691 (D.C. 2009) (en banc)
    (quoting Fry v. Pliler, 
    551 U.S. 112
    , 121 n.3 (2007)).
    29
    have supported the defense theory that Thomas lied about the robbery to get money
    to pay his debts; it was plausible Thomas knew Moore had a large amount of cash
    on him (perhaps because they both had been at Little Tey‟s and Moore had been
    gambling too).    As Moore argues on appeal, the additional impeachment, if
    successful,45 would have impeded the prosecutor from arguing to the jury that
    Thomas was an honest witness who had told only “one lie” and who was not
    manipulative enough to concoct a false story about having been robbed. In this
    vigorously litigated and argued case, the additional reason to be skeptical of
    Thomas might have been enough to tip the balance for the jury and cause it to
    entertain a reasonable doubt of Moore‟s guilt.46
    As we cannot deem the error harmless, we must reverse Moore‟s convictions
    and remand his case for a new trial.47
    45
    In evaluating harmlessness we must “assum[e] that the damaging potential
    of the cross-examination [would have been] fully realized.” Delaware v. Van
    Arsdall, 
    475 U.S. 673
    , 684 (1986)).
    46
    As we are unable to conclude that the error in preventing Moore from
    attempting to impeach Thomas‟s veracity with his tax return was harmless, we find
    it unnecessary to consider whether the exclusion of the proposed bias cross-
    examination was harmless as well.
    47
    The government argues that reversal of Moore‟s convictions for unlawful
    possession of a firearm and carrying a pistol without a license would be
    unwarranted in any event, because the police testimony provided “compelling,
    (continued…)
    30
    So ordered.
    PRYOR, Senior Judge, dissenting: This case presents evidentiary questions
    involving an application of long-standing trial concepts. The details of the alleged,
    armed robbery have been fully set forth in the majority opinion. At trial the
    primary testimony of the complaining witness, as well as, the cross-examination of
    him informed the jury of the context of gambling and drugs, which surrounded the
    incident. The judge declined to allow cross-examination of the complainant on the
    subject of his recent tax return for the purpose of testing his truthfulness and
    veracity. The primary issues in this appeal stem from that ruling.
    While the jury‟s primary role at trial is to be the factfinder, the settled case
    law allows the cross-examiner to test the truthfulness and bias of the witness by
    engaging the person on collateral subjects. The trial judge, in an effort to strike a
    balance between evaluating credibility and relevance to the ultimate question, is
    (continued…)
    independent evidence” of Moore‟s guilt on those charges. We do not agree. An
    officer testified to having seen someone toss a gun out the rear passenger window
    of Kent‟s SUV, next to which Moore was sitting, and a gun was found in the area.
    But if the jury had been persuaded to doubt Thomas‟s testimony that Moore had a
    gun and used it to rob him moments earlier, we think the jury reasonably might
    have hesitated to convict Moore of the weapons charges based on what remained
    of the government‟s case.
    31
    authorized to use discretion in imposing limits on such cross-examination.
    Although cross-examination was permitted as to some collateral behavior of the
    witness, it was precluded entirely as to tax questions. The judge concluded that
    such questioning could only lead to jury speculation and also raise questions of
    self-incrimination of the witness. In resolving this issue, I am mindful of the
    Federal Rules of Evidence, Rule 403, which provides:
    The court may exclude relevant evidence if its probative
    value is substantially outweighed by the danger of one or
    more of the following: unfair prejudice, confusing
    issues, misleading the jury, undue delay, wasting time, or
    needlessly presenting cumulative evidence.
    Bearing in mind Rule 403 and the exercise of discretion entrusted to the trial
    judge, I conclude there was no error on this question. But understanding that
    appellant‟s primary defense was to challenge the complainant‟s veracity, it would
    appear that even if the exclusion of questions bearing on taxes was error, it was
    harmless error. Thus the error must have had a substantial effect on the verdict.
    Kotteakos v. United States, 
    328 U.S. 750
    (1946); see also Bennett v. United States,
    
    763 A.2d 1117
    (D.C. 2000) (This kind of error to be evaluated under Kotteakos).
    Lastly, I would clearly affirm the firearm violation.