United States v. Lindell Luck , 852 F.3d 615 ( 2017 )


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  •                            RECOMMENDED FOR FULL-TEXT PUBLICATION
    Pursuant to Sixth Circuit I.O.P. 32.1(b)
    File Name: 17a0074p.06
    UNITED STATES COURT OF APPEALS
    FOR THE SIXTH CIRCUIT
    UNITED STATES OF AMERICA,                                ┐
    Plaintiff-Appellee,   │
    │
    >      No. 15-5746
    v.                                                │
    │
    │
    LINDELL LUCK,                                            │
    Defendant-Appellant.     │
    ┘
    Appeal from the United States District Court
    for the Western District of Tennessee at Memphis.
    No. 2:13-cr-20303—Samuel H. Mays, Jr., District Judge.
    Argued: March 9, 2017
    Decided and Filed: March 31, 2017
    Before: CLAY, SUTTON, and GRIFFIN, Circuit Judges.
    _________________
    COUNSEL
    ARGUED: Jeffrey B. Lazarus, OFFICE OF THE FEDERAL PUBLIC DEFENDER,
    Cleveland, Ohio, for Appellant. Kevin G. Ritz, UNITED STATES ATTORNEY’S OFFICE,
    Memphis, Tennessee, for Appellee. ON BRIEF: Jeffrey B. Lazarus, OFFICE OF THE
    FEDERAL PUBLIC DEFENDER, Cleveland, Ohio, for Appellant. Kevin G. Ritz, UNITED
    STATES ATTORNEY’S OFFICE, Memphis, Tennessee, for Appellee.
    _________________
    OPINION
    _________________
    GRIFFIN, Circuit Judge. Charged with possession and distribution of child pornography,
    defendant Lindell Luck sought, unsuccessfully, to force the government to stipulate to the child-
    pornographic nature of the material recovered from his laptops. On appeal, he contends that the
    No. 15-5746                           United States v. Luck                               Page 2
    district court’s refusal to force the stipulation violated the Supreme Court’s decision in Old Chief
    v. United States, 
    519 U.S. 172
    (1997), which enforced a similar stipulation for felon status in
    felon-in-possession cases. We disagree. Overlooked in defendant’s presentation is an important
    caveat from Old Chief. “[O]ur holding,” Old Chief said, “is limited to cases involving proof of
    felon status,” 
    id. at 183
    n.7—an explicit limitation that this court has relied on in rejecting
    previous attempts to expand Old Chief. We do so again, and hold that, in light of the explicit
    limitation on Old Chief’s holding, as well as the material distinctions between felon status and
    the nature of the images in child pornography cases, the district court did not err in refusing to
    force the government to stipulate. Finding no reversible error in defendant’s remaining claims
    on appeal, we affirm.
    I.
    In August 2012, agents with the FBI Crimes Against Children Task Force discovered
    someone at 3425 Porters Gap Road in Halls, Tennessee, was using the Internet to download and
    share child pornography. They sought a search warrant for the home, which they executed on
    October 24, 2012. When they arrived, lead agents Aaron Thompson and Keith Melancon
    introduced themselves to the homeowner, Donnie Luck, and asked that he gather the other family
    members in the living room. There, agents told Donnie, his wife, Lynne Luck, and their twenty-
    one-year-old, live-in son (and defendant here), Lindell Luck, the reason for their visit.
    According to Thompson, they told the Lucks they were free to leave while they executed the
    search warrant, but that they would like to ask them some questions. Although Donnie and
    Lynne did not recall being told they could leave, everyone agreed to answer questions.
    Agents began with a round of general investigative questions until an answer to one
    question caught Thompson’s attention: Lindell indicated that he had used something called a
    peer-to-peer file sharing network—the type of computer program that agents knew was used to
    download and share the pornographic material from 3425 Porters Gap Road. When agents heard
    this, they asked to speak with Lindell privately, offering to spare Lindell from having to answer
    embarrassing questions in front of his parents. Lindell and his parents agreed, and he and the
    agents departed to a nearby bedroom.
    No. 15-5746                            United States v. Luck                                Page 3
    Once everyone got settled, Lindell divulged that he had viewed child pornography when
    he was younger. He told agents that a friend downloaded files onto his laptop using a peer-to-
    peer network, and also gave him a thumb drive with child pornography. The laptop, however,
    was not in the house because it was being repaired for viruses. Agents asked if they could have a
    look at his online activity, and Lindell agreed. After their conversation ended, Lindell rejoined
    his mother and father in the living room.
    Meanwhile, the agents’ search progressed to defendant’s bedroom, where they found
    another laptop that the family failed to disclose during the initial round of questioning. They
    asked to speak with Lindell again, and he agreed. Confronted with the latest discovery, Lindell
    changed his story. He told agents that he had viewed child pornography as recently as a week
    and a half ago, describing the type of peer-to-peer network he used to do so. He also clarified
    that he put child pornography on the thumb drive, not his friend. Agents asked if he would like
    to put his latest statement in writing. He agreed, but not before agents advised him of his right to
    remain silent, that any statement he made was completely voluntary, and that he did not have to
    give a statement. He dictated the following statement to agent Thompson:
    I, Lindell “Logan” Luck, am giving this statement freely and voluntarily without
    threats or force from Law Enforcement. I have been advised of my right to refuse
    such statement and remain silent. I have requested Special Agent Thompson to
    write this statement as I tell it in my words.
    I began looking at child pornograph [sic] when I was younger with a friend,
    Colton, and it grew into a habit. I do not get sexual gratification from it. I do it to
    relieve stress because it gives me a sense of control in my life. I want to stop but
    I’ve never been able to stop on my own from looking at it. I’m sorry for putting
    everyone though what I’ve put them through — my family.
    After reviewing Thompson’s transcription for accuracy, Lindell signed the statement.
    The search ended a short while later.
    According to Lindell, he has no memory of anything that occurred during the search, a
    consequence, he says, of the medications he was taking that “pretty much make [him] turn into a
    zombie anywhere between an hour and a half to two hours” after he wakes up.
    No. 15-5746                              United States v. Luck                              Page 4
    The fruits of the search resulted in a three-count indictment against Lindell for
    distributing and possessing child pornography, in violation of 18 U.S.C. § 2252(a)(2), (a)(4)(B).
    In the lead up to trial, the parties filed three motions that are at issue in this appeal.
    First, defendant filed a motion to suppress the statements he gave to agents, contending
    that they were the product of “custodial interrogation” without the required Miranda warnings.
    He alternatively argued that the statements were involuntary under the Due Process Clause. The
    district court disagreed with both contentions and denied the motion.
    Defendant also filed a motion to require the government to stipulate that the images
    recovered from his laptops depicted child pornography, thereby obviating the need to show them
    to the jury. The district court denied the motion, holding that “[t]he Government is entitled to
    prove its case free from any obligation to stipulate to the [e]vidence.”
    Finally, the government filed a motion in limine to exclude evidence of Lindell’s physical
    and mental health and learning disability. Deferring decision on the motion until trial, the
    district court granted the motion after defendant made an offer of proof about what Lynne would
    say regarding defendant’s medical history and its lasting effects. The district court ruled that her
    testimony was inadmissible because, although probative in some respects, it raised a “significant
    risk of confusion about what the case is about.”
    At trial, defendant also attempted to put Donnie on the stand for the sole purpose of
    invoking his Fifth Amendment right against self-incrimination in response to questions about
    whether he viewed or downloaded child pornography. Over defendant’s objection, the district
    court prevented him from doing so, finding that it would have “no probative value at all.”
    At the close of trial, the jury found defendant guilty as charged, and the district court
    sentenced him to 78 months in prison.
    II.
    Defendant first argues that his statements to agents were inadmissible for two alternative
    reasons: one, he was “in custody” when agents questioned him without first advising him of his
    rights; and two, the agents used coercive conduct that rendered his statements involuntary under
    No. 15-5746                          United States v. Luck                              Page 5
    the Due Process Clause. In resolving these claims, we “review[] the district court’s factual
    findings for clear error and its legal conclusions de novo.” United States v. Binford, 
    818 F.3d 261
    , 267 (6th Cir. 2016).
    A.
    Law enforcement officials are required to advise a person of their Miranda rights before
    engaging in “custodial interrogation.” See Miranda v. Arizona, 
    384 U.S. 436
    , 444–45 (1966).
    As the quoted phrase implies, this requirement applies “only where there has been such a
    restriction on a person’s freedom as to render him ‘in custody.’” Oregon v. Mathiason, 
    429 U.S. 492
    , 495 (1977). In determining whether a person is “in custody” for purposes of Miranda,
    courts look to “the objective circumstances of the interrogation . . . to determine how a
    reasonable person in the position of the individual being questioned would gauge the breadth of
    his or her freedom of action[.]” United States v. Panak, 
    552 F.3d 462
    , 465 (6th Cir. 2009)
    (internal quotation marks and citation omitted). The ultimate inquiry is whether, under the
    totality of the circumstances, the interviewee’s freedom of movement was restrained to a degree
    associated with formal arrest. 
    Id. If so,
    he is “in custody” for purposes of Miranda. Guiding the
    inquiry are four, non-exhaustive factors: “(1) the location of the interview; (2) the length and
    manner of the questioning; (3) whether there was any restraint on the individual’s freedom of
    movement; and (4) whether the individual was told that he or she did not need to answer the
    questions.” United States v. Hinojosa, 
    606 F.3d 875
    , 883 (6th Cir. 2010).
    Under the totality of the circumstances, defendant was not “in custody.” To begin,
    defendant was questioned in his home, a fact that typically weighs against being “in custody.”
    
    Panak, 552 F.3d at 466
    . As for “the length and manner of the questioning,” 
    Hinojosa, 606 F.3d at 883
    , agents interviewed defendant for roughly an hour, in two separate 20-to-30 minute
    sessions—not lengthy by our standards. See 
    Mathiason, 429 U.S. at 495
    . During that time,
    agents spoke to defendant in a calm, conversational manner, never becoming aggressive or
    brandishing their weapons. Nor was defendant’s “freedom of movement” restrained in any
    significant way. After agents asked to speak with defendant separately, defendant and his
    parents acquiesced, and he voluntarily accompanied them to a nearby bedroom. During each
    session, agents kept the door open and did not block the exit, positioning themselves either in a
    No. 15-5746                           United States v. Luck                               Page 6
    chair, on the floor, or standing across the room. Although agents did not tell defendant he was
    free to leave, they did inform him that he did not have to provide a statement. They also
    informed the entire family at the start of the search that they were free to leave the home.
    Defendant stresses that he was “a 21-year-old kid who never lived outside of his parents’ home,
    who ha[d] severe learning disabilities, and [who] was coming off sleeping medications from the
    night before,” but none of these facts, except maybe age, see J.D.B. v. North Carolina, 
    564 U.S. 261
    , 277 (2011), are relevant under the objective “custody” inquiry, and the fact that he was a
    twenty-one-year-old adult does not weigh in his favor. Taken together, nothing about the
    objective circumstances of the interrogations indicate that a reasonable person in defendant’s
    position would suspect he was under arrest or otherwise not free to leave.
    Defendant’s remaining arguments to the contrary are unpersuasive. First, he argues that
    the district court relied too heavily on the location of the questioning. We agree with defendant
    that location is not decisive in the custody analysis. The team with the home-field advantage
    will not necessarily win the sporting contest, but it is also called a home-field advantage for a
    reason—individuals are more comfortable speaking up and asserting themselves in the familiar
    confines of their home. See 
    Panak, 552 F.3d at 466
    (“[A]ll individuals, the meek and the brazen
    alike, generally will find it easier to exercise such control on their home turf than at the station
    house.”). And, contrary to defendant’s concern, the district court recognized that location is not
    conclusive of custody, observing that law enforcement agents can easily turn the home into an
    inhospitable setting by, for instance, arriving in large numbers, using a show of authority like
    brandishing weapons, or engaging in aggressive questioning. See 
    id. (recognizing that
    these
    circumstances “may transform one’s castle into an interrogation cell”). As discussed above,
    however, none of these circumstances are present in this case.
    Defendant also argues that the district court did not rely heavily enough on Donnie and
    Lynne’s account of what happened in the living room and whether they felt free to leave. We
    agree that the first-hand perceptions of individuals who are not the interviewee are relevant when
    setting the scene of the interrogation, see Thompson v. Keohane, 
    516 U.S. 99
    , 112 (1995), but
    defendant is wrong to rely on Donnie and Lynne’s subjective assessment of their ability to leave
    to support the proposition that a reasonable person in Lindell’s position would not have felt free
    No. 15-5746                          United States v. Luck                               Page 7
    to leave. Their actual mindset is no more relevant than that of the interviewee. See Yarborough
    v. Alvarado, 
    541 U.S. 652
    , 667–69 (2004). Moreover, the focus of the inquiry is on a reasonable
    person in the defendant’s shoes. United States v. Galloway, 
    316 F.3d 624
    , 629 (6th Cir. 2003).
    Because Donnie and Lynne were not present during either interview, their account of the
    objective circumstances of what happened in the living room has only marginal relevance in the
    analysis.
    For these reasons, we conclude that defendant was not “in custody” for purposes of
    Miranda.
    B.
    Defendant also argues that, regardless of whether he was in custody, his statements to
    agents were involuntary under the Due Process Clause.
    This court uses a three-part inquiry to determine whether a confession is involuntary
    under the Due Process Clause. We ask: first, whether the police activity was “objectively
    coercive”; second, whether that coercion was “sufficient to overbear the defendant’s will”; and
    third, whether the coercive conduct was “the crucial motivating factor in the defendant’s decision
    to offer the statements.” 
    Binford, 818 F.3d at 271
    (quoting United States v. Mahan, 
    190 F.3d 416
    , 422 (6th Cir. 1999).
    Defendant argues that he was under the influence of sleep medications at the time of the
    interrogation, rendering him especially vulnerable to the agents’ interrogation and making the
    agents’ conduct objectively coercive. There are two problems with this argument—one factual,
    one legal. First, the agents gave a different factual account. Agent Thompson testified that he
    did not get the sense that defendant was under the influence of any drugs, alcohol, or medication.
    And Agent Melancon did not get the impression that defendant, who he says provided clear
    statements and spoke in complete sentences, was in a zombie-like daze. Moreover, while his
    parents testified about defendant’s lethargic demeanor on a typical morning, they never actually
    described defendant’s demeanor on October 24, 2012. In any event, the district court credited
    the agents’ version of events, a ruling we will not disturb absent “a definite and firm conviction
    that the trial court committed a clear error of judgment.” United States v. Miner, 
    774 F.3d 336
    ,
    No. 15-5746                           United States v. Luck                              Page 8
    348 (6th Cir. 2014); see also United States v. Johnson, 
    732 F.3d 577
    , 582 (6th Cir. 2013)
    (credibility determinations reviewed for clear error). Defendant offers no reason why the district
    court’s credibility determination was clearly erroneous.
    Second, even if defendant’s cognitive or volitional capacity was impaired, that “is never,
    by itself, sufficient to warrant the conclusion that his confession was involuntary for purposes of
    due process; some element of police coercion is always necessary.” United States v. Newman,
    
    889 F.2d 88
    , 94 (6th Cir. 1989). According to Agent Thompson and Agent Melancon, there was
    no coercion. They spoke in conversational tones, did not threaten defendant or yell at him, and
    told him he did not have to provide a statement if he did not want to. Defendant was not arrested
    or otherwise prevented from leaving the agents’ presence.           These circumstances amply
    demonstrate that defendant’s statements were not the product of police coercion. See 
    Mahan, 190 F.3d at 423
    (holding that a statement given under similar circumstances was not
    involuntary). Defendant does not challenge their account or otherwise argue that the agents’
    conduct was overbearing or objectively coercive—nor could he, since he testified he has no
    recollection of the events of October 24, 2012.
    But defendant has an answer for this shortcoming.         He contends that because the
    government failed to record his statements—in violation of a recent Department of Justice policy
    encouraging the use of recording devices for some interrogations—this court should draw an
    adverse inference from that fact for purposes of the due process analysis.         There are two
    problems with this argument, as well; again, one factual and one legal. First, the 2014 policy did
    not exist at the time agents questioned defendant, and, by its own terms, it only applies to
    individuals who have been arrested. Dep’t of Justice, Attorney General Holder Announces
    Significant Policy Shift Concerning Electronic Recording of Statements (May 22, 2014),
    https://www.justice.gov/opa/pr/attorney-general-holder-announces-significant-policy-shift-
    concerning-electronic-recording (accessed March 27, 2017). Defendant was not “in custody,”
    much less arrested. Thus, even if there is merit to the suggestion, there is no factual basis to
    endorse it in this case.
    But defendant’s argument has a more fundamental flaw:             “[A] violation by the
    government of its internal operating procedures, on its own, does not create a basis for
    No. 15-5746                            United States v. Luck                               Page 9
    suppressing [statements].” United States v. Myers, 
    123 F.3d 350
    , 355–56 (6th Cir. 1997). In
    other words, that the Department of Justice happened to conclude, in its professional judgment,
    that it was wise policy to encourage recording of interviews does not mean the new technique is
    now required in order to comport with due process. As with Mr. Herbert Spencer’s Social
    Statics, the Constitution does not enact the internal operating procedures that happen to be in
    vogue at the Department of Justice, or any other government agency. See Lochner v. New York,
    
    198 U.S. 45
    , 75 (1905) (Holmes, J., dissenting).
    For these reasons, the district court did not err in holding that defendant’s statements
    were voluntary under the Due Process Clause.
    III.
    Defendant also challenges three evidentiary decisions. First, whether the government
    was forced to stipulate to the child-pornographic nature of the images recovered from
    defendant’s computers. Second, whether the district court erred in excluding evidence of his
    prior medical history and learning disability. And third, whether the district court erred in
    prohibiting Donnie Luck from taking the stand in order to invoke his Fifth Amendment privilege
    against self-incrimination. We review such decisions for an abuse of discretion. United States v.
    Odeh, 
    815 F.3d 968
    , 982 (6th Cir. 2016); United States v. Clark, 
    988 F.2d 1459
    , 1464 (6th Cir.
    1993).
    A.
    Defendant argues that the district court erred in denying his motion to stipulate to the
    nature of the images recovered from his laptops.
    As a general rule, a “defendant has no right to selectively stipulate to particular elements
    of the offense.” United States v. Boyd, 
    640 F.3d 657
    , 668 (6th Cir. 2011) (quoting United States
    v. Hebeka, 
    25 F.3d 287
    , 291 (6th Cir. 1994)) (internal quotation marks omitted). Twenty years
    ago, the Supreme Court carved out an exception: the government cannot refuse a defendant’s
    offer to stipulate to his felon status in federal felon-in-possession prosecutions. Old 
    Chief, 519 U.S. at 191
    –92. The reason, the Court said, was because the general rule has “virtually no
    No. 15-5746                           United States v. Luck                              Page 10
    application when the point at issue is . . . dependent on some judgment rendered wholly
    independently of the concrete events of later criminal behavior charged against him.” 
    Id. at 190.
    Because the nature of a prior conviction is not an element of the felon-in-possession offense and
    the fact of a prior conviction is “entirely outside the natural sequence of what the defendant is
    charged with thinking and doing to commit the current offense,” “[p]roving [felon] status
    without telling exactly why that status was imposed leaves no gap in the story of a defendant’s
    subsequent criminality.” 
    Id. at 191.
    Lacking any justification to apply the general rule, the
    Court held that a district court abuses its discretion when it refuses to accept a stipulation
    regarding felon status in felon-in-possession prosecutions. 
    Id. at 191–92.
    Since then, defendants have sought to expand Old Chief’s exception beyond the issue of
    felon status. See 
    Odeh, 815 F.3d at 982
    (prior conviction in naturalization fraud prosecution);
    
    Boyd, 640 F.3d at 669
    (serious bodily injury in carjacking prosecution); United States v. Owens,
    
    159 F.3d 221
    , 225–26 (6th Cir. 1998) (witness bias in gambling conspiracy prosecution). This
    court has consistently rejected such requests, relying on the explicit disclaimer in Old Chief’s
    footnote 7 that “[its] holding is limited to cases involving proof of felon status.” Old 
    Chief, 519 U.S. at 183
    n.7; see, e.g., 
    Odeh, 815 F.3d at 982
    (“Because this case does not involve a
    prosecution under the felon-in-possession statute, the Old Chief exception does not apply.”
    (citing Old 
    Chief, 519 U.S. at 183
    n.7)); 
    Boyd, 640 F.3d at 668
    (“The Court explicitly limited its
    holding ‘to cases involving proof of felon status.’” (quoting Old 
    Chief, 519 U.S. at 183
    n.7)).
    This case involves yet another request to expand Old Chief, this time in the context of
    images depicting child pornographic material. As the parties point out, this court has rejected
    similar requests on at least two occasions, though only in unpublished decisions. See United
    States v. Mellies, 329 F. App’x 592, 599–600 (6th Cir. 2009); United States v. Caldwell, 
    181 F.3d 104
    , 
    1999 WL 238655
    , at *6 (6th Cir. 1999) (unpublished table decision). Defendant
    argues we “should not follow” these prior decisions. He contends that Mellies and Caldwell are
    distinguishable because, given the type of material at issue in those cases (CDs, magazines, and
    films), “the jury had no way of confirming the items in question were in fact child pornography,
    and presenting the contents to the jury held high probative value.” Not so here, defendant says,
    because the file names of the digital images established that they were child pornography.
    No. 15-5746                            United States v. Luck                              Page 11
    This argument fails on several levels. First and foremost, Mellies and Caldwell are
    consistent with our published authority that has rejected attempts to expand Old Chief on the
    basis that the Supreme Court limited its holding to the specific element and offense at issue in
    that case. See Caldwell, 
    1999 WL 238655
    , at *6 (“The Supreme Court recognized an exception
    to this general rule only for stipulations to prior convictions as an element of an offense[.]”);
    Mellies, 329 F. App’x at 599 n.10 (“[T]he Supreme Court unambiguously limited its holding in
    Old Chief to “‘cases involving proof of felon status.’” (quoting Old 
    Chief, 519 U.S. at 183
    n.7));
    see also, e.g., 
    Odeh, 815 F.3d at 982
    (“Because this case does not involve a prosecution under
    the felon-in-possession statute, the Old Chief exception does not apply.” (citing Old 
    Chief, 519 U.S. at 183
    n.7)). Although Mellies and Caldwell are not binding on us, published cases like
    Odeh are. In light of the practice of this circuit to reject attempts to expand Old Chief as a matter
    of law, any factual nuances between this case and Mellies and Caldwell are simply irrelevant.
    Furthermore, defendant’s analysis of Mellies and Caldwell is faulty. He contends that
    publishing the actual images was necessary in Mellies and Caldwell because, given the format of
    the materials at issue, it was impossible for the jury to determine their illegal nature without
    seeing the actual images. In contrast, he argues, the jury in this case could determine their nature
    from the file names. But this reasoning belies the basic premise in these cases: by entering the
    requested stipulation, there is no need to admit the actual images or other evidence to establish
    that element. Regardless of how else the material in Mellies and Caldwell could have been
    identified as child pornography, it was the stipulation—not some other evidentiary means—that
    would have sufficed to prove that the images depicted child pornography.
    But defendant insists that Mellies and Caldwell are only persuasive authority, which
    allows us to decide the issue differently as a matter of first impression. That is true; but even if
    we were writing on a blank slate, critical differences between the felon-status element in felon-
    in-possession cases and the child-pornographic image element in child pornography cases make
    it abundantly clear that Old Chief’s rationale does not apply in this context. There are at least
    three material distinctions.
    First, the keystone in Old Chief’s holding was the fact that felon status was outside the
    natural sequence of concrete events that the prosecution has an interest in presenting with robust
    No. 15-5746                            United States v. Luck                               Page 12
    evidence and a coherent, unbroken narrative. See Old 
    Chief, 519 U.S. at 190
    . Unlike felon
    status, however, the pornographic nature of the image in a child pornography case plays a vital
    role in the government’s narrative of the concrete events comprising the charged offense. And
    removing a central chapter in the government’s tale, Old Chief recognized, risks leaving the
    jurors puzzled, or worse, ready to “penalize the party who disappoints them.” 
    Id. at 188–89.
    Second, in stark contrast to felon status, the images in a child pornography prosecution
    have multiple utility, tending to establish both the fact that they are pornographic and the fact
    that defendant acquired and distributed the images knowing they depicted child pornography.
    Old Chief recognized the persuasive power of this type of evidence, observing that “a piece of
    evidence may address any number of separate elements, striking hard just because it shows so
    much at once[.]” 
    Id. at 187.
    And finally, Old Chief recognized that “the evidentiary account of what a defendant has
    thought and done can accomplish what no set of abstract statements ever could, not just to prove
    a fact but to establish its human significance, and so to implicate the law’s moral underpinnings
    and a juror’s obligation to sit in judgment.” 
    Id. at 187–88.
    Unlike the felon-in-possession
    offense, child pornography cases are especially susceptible to a wide range of strong emotional
    responses, including disbelief that a defendant would commit the act in question. Showing the
    actual images paints a portrait far more vivid than a sanitized stipulation, thereby establishing for
    the jury “its human significance,” and in the process “implicating the law’s moral underpinnings
    and a juror’s obligation to sit in judgment.” 
    Id. In sum,
    none of the major justifications for abandoning the general rule for felon status
    stipulations are present. To the contrary, this case implicates all the traditional justifications Old
    Chief gave for adhering to the general rule that “a criminal defendant may not stipulate or admit
    his way out of the full evidentiary force of the case as the Government chooses to present it.” 
    Id. at 186–87.
    For all these reasons, the district court did not err in refusing to force the government to
    stipulate to the nature of the images recovered from defendant’s devices.
    No. 15-5746                           United States v. Luck                              Page 13
    B.
    Defendant next argues that the district court erred in excluding evidence of his prior
    medical history and learning disability under Federal Rule of Evidence 403. See Fed. R. Evid.
    403 (providing that otherwise relevant evidence is inadmissible “if its probative value is
    substantially outweighed by a danger of . . . unfair prejudice, confusing the issues, misleading the
    jury, undue delay, wasting time, or needlessly presenting cumulative evidence”).
    During his case-in-chief, defendant sought to present testimony from his mother
    regarding his medical history and learning disability.       Outside the jury’s presence, Lynne
    proffered testimony about defendant’s diagnosis with leukemia at age eight, his three years of
    chemotherapy, and how one round of chemotherapy went wrong, causing lasting side effects on
    his joints, memory, and ability to read and write. After hearing the proffer, the district court
    ruled that her testimony was probative in two respects (how the statements to agents were made
    and whether he knowingly possessed child pornography), but that the probative value was
    outweighed by the “significant risk” of juror confusion. The court explained:
    The fact that he took Benadryl and melatonin is in the record already. What its
    impact was on him is certainly appropriate. He could probably even have why he
    took it, because he had knee and ankle pain. There’s no prejudice in that coming
    in, no unfair prejudice.
    If we go back through his history of treatment for leukemia when he was 8 years
    old and three years of chemotherapy, which is, when, from 8 to 11, and
    procedures that were not handled correctly, that has a very high risk of unfair
    prejudice; and it’s not at issue in this case.
    The court concluded, “I’m afraid it becomes the elephant in the room; and all they look at is the
    elephant.”
    Defendant argues the district court abused its discretion in excluding Lynne’s testimony.
    Not only did the district court apply the wrong legal standard, defendant says, it also
    mischaracterized Lynne’s testimony as being about “procedures that were not handled correctly.
    As for the first claim, a contextual reading of the transcript demonstrates that the district court
    was aware of the correct legal standard. Several lines after stating that the probative value was
    “outweighed” by unfair prejudice (not “substantially outweighed”), the district court stated:
    No. 15-5746                            United States v. Luck                              Page 14
    “It’s a significant – there’s a significant risk of confusion about what the case is about.”
    (Emphasis added.) While not a verbatim recitation of Rule 403, the district court’s reasoning
    reflects an understanding of the governing legal framework. And as for the second claim—the
    district court’s characterization of Lynne’s testimony—while the primary purpose of Lynne’s
    testimony might have been to highlight defendant’s current mental and physical state, she did not
    limit her proffer to that evidence. Instead, she testified about the entire series of unfortunate
    events that befell defendant as a child. In this context, the district court’s concern about the case
    becoming about “procedures that were not handled correctly” was well-founded.
    Defendant also contends that the district court did not adequately explain why the risk of
    confusion justified exclusion in this case. But the ruling was self-explanatory: the case was
    about whether, and under what circumstances, defendant confessed to agents on October 24,
    2012. The fact that defendant was treated for leukemia in 2001 had no bearing on that issue.
    As the district court stated, what was relevant was the fact that defendant was taking medications
    that may have affected his state of mind on the day of the search, not the entire back story as to
    why he was taking them. Defendant was able to put in evidence regarding his state of mind on
    the day of the search, including the side effects of his medications.
    The same goes for the evidence of defendant’s learning disability.           Although this
    evidence was certainly relevant to the circumstances under which he confessed to authorities, we
    cannot say the evidence was so probative that the district court committed a clear error of
    judgment in excluding it because of “a significant risk” of juror confusion. In fact, the rationale
    for the district court’s decision makes sense: while the mere fact that he had a learning disability
    was potentially relevant, the entire back story as to why he had the learning disability was not.
    Defendant sought to present the entire saga to the jury, medical history and all. It was in this
    context that the district court reasonably concluded that the proffered evidence would present a
    significant risk of juror confusion: “I don’t think it’s appropriate for the case to be about the
    defendant’s history of medical treatment, which is what we’re going to have if we go down this
    road.”
    Moreover, even assuming the district court abused its discretion in excluding evidence of
    defendant’s learning disability, the error, if any, was harmless. A non-constitutional evidentiary
    No. 15-5746                             United States v. Luck                            Page 15
    error is harmless if the government can “show by a preponderance of the evidence that the error
    did not materially affect the verdict.” United States v. Kilpatrick, 
    798 F.3d 365
    , 378 (6th Cir.
    2015) (emphasis omitted). The government makes that showing here. The learning disability
    evidence had no bearing on whether defendant committed the offenses, only the circumstances
    under which he made statements to authorities. Setting aside his statements, the government
    presented evidence that a laptop found in defendant’s bedroom, which was password-protected
    with his username, contained peer-to-peer software and child pornography. There was similar
    evidence for defendant’s second laptop. The government also presented evidence that someone
    at defendant’s address was using the Internet and peer-to-peer networks to share child
    pornography files.      This wealth of unimpeached evidence that defendant possessed and
    distributed child pornography using his laptops supplies this court with “a fair assurance that the
    outcome of [the] trial was not affected by [any] evidentiary error.” United States v. Johnson,
    
    440 F.3d 832
    , 847 (6th Cir. 2006) (quoting McCombs v. Meijer, Inc., 
    395 F.3d 346
    , 358 (6th Cir.
    2005)).
    C.
    Finally, defendant appeals the district court’s ruling prohibiting Donnie Luck from taking
    the stand in order to invoke his Fifth Amendment privilege against self-incrimination.
    The practice of calling a witness for the sole purpose of invoking the right against self-
    incrimination is “so imbued with the ‘potential for unfair prejudice’ that a trial judge should
    closely scrutinize any such request.” United States v. Vandetti, 
    623 F.2d 1144
    , 1147 (6th Cir.
    1980) (quoting United States v. Maffei, 
    450 F.2d 928
    , 929 (6th Cir. 1971)). This close scrutiny is
    required for a variety of reasons, not the least of which is the concern that the jury will
    improperly infer guilt from the exercise of the privilege, 
    id. at 1148,
    which in turn “creates
    potential for collusion between the witness and defendant[,]” United States v. Ballard, 280 F.
    App’x 468, 471 (6th Cir. 2008). This potential for collusion “is particularly problematic when
    the defendant and witness have a personal or familial relationship[.]” 
    Id. Defendant admits
    that the purpose of having Donnie take the stand was to plant the idea
    that he, not Lindell, was the perpetrator. Because the law forbids the very purpose for which
    No. 15-5746                            United States v. Luck                              Page 16
    defendant sought to use Donnie’s testimony, see 
    id. at 470
    (“[A] jury is ‘not entitled to draw any
    inferences from the decision of a witness to exercise his constitutional privilege.’” (quoting
    Bowles v. United States, 
    439 F.2d 536
    , 541 (D.C. Cir. 1970)), allowing Donnie to take the stand
    would have served no useful evidentiary purpose. Given the absence of probative value in
    having Donnie take the stand, and the heightened potential for collusion given the father-son
    relationship, we have no difficulty in holding that the district court exercised sound discretion in
    prohibiting Donnie from taking the stand for the sole purpose of pleading the Fifth.
    Defendant raises several arguments to the contrary, but they do not compel a different
    conclusion. Defendant first argues that the district court failed to adequately consider the
    prejudice to his case in not putting Donnie on the stand. But the court did address this issue by
    observing that the jurors would have been forbidden from drawing the very inference he hoped
    they would draw from his testimony. Defendant may have been unable to present what he
    considered favorable evidence, but because the law forbade the jury from considering Donnie’s
    testimony for the primary purpose defendant sought to use it, any relevance was outweighed by
    the risk of unfair prejudice to the government.
    Defendant also argues that the district court’s decision violated his Sixth Amendment
    right to compulsory process. This argument is misplaced. “A defendant’s right to compel
    testimony yields to a witness’s assertion of his or her Fifth Amendment privilege when the
    claimed privilege is grounded on a reasonable fear of prosecution.” United States v. Highgate,
    
    521 F.3d 590
    , 593 (6th Cir. 2008). Defendant does not argue that his father’s invocation was not
    grounded in a reasonable fear of prosecution.
    Finally, defendant claims that affirming the district court on this issue will have a
    “chilling effect” on trial counsel, discouraging them from preparing their witnesses before trial.
    This argument does not give us pause. For one, it is difficult to imagine trial counsel will stop
    preparing their witnesses for trial on the off chance that they might disclose their desire to invoke
    their Fifth Amendment right. And two, to the extent defendant claims attorneys will be tempted
    to abandon their duty of candor under this regime, needless to say, this court will not fashion
    legal rules on the premise that attorneys might violate their professional responsibilities.
    No. 15-5746                             United States v. Luck                       Page 17
    Cf. Strickland v. Washington, 
    466 U.S. 668
    , 688 (1984) (stating that law presumes that counsel
    will fulfill their role in the adversary system).
    IV.
    For these reasons, we affirm defendant’s convictions.