United States v. Padilla-Galarza ( 2021 )


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  •           United States Court of Appeals
    For the First Circuit
    No. 18-2078
    UNITED STATES OF AMERICA,
    Appellee,
    v.
    JOSÉ PADILLA-GALARZA,
    a/k/a Joey,
    Defendant, Appellant.
    APPEAL FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF PUERTO RICO
    [Hon. Daniel R. Domínguez, U.S. District Judge]
    Before
    Lynch, Selya, and Lipez,
    Circuit Judges.
    Rafael F. Castro Lang for appellant.
    Alexander L. Alum, Assistant United States Attorney, with
    whom W. Stephen Muldrow, United States Attorney, and Mariana E.
    Bauzá-Almonte, Assistant United States Attorney, Chief, Appellate
    Division, were on brief, for appellee.
    March 5, 2021
    SELYA, Circuit Judge.   Defendant-appellant José Padilla-
    Galarza, having created a ruckus before a jury empaneled to hear
    criminal charges against him for armed bank robbery and related
    crimes, tries to turn the tables.       He asserts that his outburst
    should have prompted the district court to grant his motion for a
    mistrial.    For good measure, he spells out an alphabet of putative
    errors, ranging from allegations of arbitrary authorization of
    protective orders to allegations that the district court failed to
    zap excesses of prosecutorial zeal.      Concluding, as we do, that
    the appellant's claims lack force, we affirm the judgment below.
    I
    We start by briefly rehearsing the background of the
    case, drawing the facts from a balanced assessment of the record.
    To the extent that the government's evidence about the scheme and
    the appellant's involvement in it differs from the appellant's own
    testimony, we generally credit the government's evidence (as did
    the jury).    Cf. United States v. Maraj, 
    947 F.2d 520
    , 522 (1st
    Cir. 1991) (providing that when reviewing a motion for judgment of
    acquittal, all facts must be taken in the light most favorable to
    the government).    We then sketch the travel of the case.
    A
    On November 29, 2014, an armed heist took place at a
    Banco Popular branch in Bayamón, Puerto Rico.      Three individuals
    — Johan Dávila-Rivera (Dávila), Jorge Camacho-Gordils (Camacho),
    - 2 -
    and Samuel Figueroa — entered the bank disguised as construction
    workers and wearing helmets, black gloves, and fake facial hair.
    Once inside, the trio brandished firearms, ordered everyone to the
    floor,   and    demanded   money   from   the   bank's    vault.    A   teller
    complied, filling bags with what was later determined to be a total
    of $64,633.13.      But this was not all:        the teller also inserted
    electronic dye-pack devices designed to spew dye, smoke, and other
    substances when removed from the premises.
    Bags of money in hand, the three robbers fled.              At that
    point, their plan promptly began to unravel.             Dávila was forced to
    discard some of the bags when they began to smoke.            With what loot
    remained, the robbers sped off in a getaway car (a green Toyota
    Tercel).       Soon thereafter, they switched cars, abandoned the
    Toyota, and scattered (with Figueroa retaining most of what money
    remained).
    Subsequent investigation revealed that Dávila, Camacho,
    and Figueroa did not act alone in carrying out the robbery:                the
    appellant played a leading role both in recruiting a crew and in
    developing and executing the scheme.             Among other things, the
    evidence supported findings that he did the planning, delivered
    the disguises used in the robbery, and laid out the approach to
    the bank.
    When the authorities dug deeper, they learned that the
    appellant's scheme extended beyond the bank robbery itself.                 As
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    part of the plot, two other coconspirators — Miguel Torres-Santiago
    (Torres) and Jomar Hernández-Román (Hernández) — had been slated
    to rob the nearby Abraham Rosa Credit Union earlier the same day.
    The appellant enlisted their participation and met with them
    several times at Hernández's residence.          At the second such
    meeting, the appellant mentioned that he intended to have fake
    bombs planted as a distraction.
    The appellant set both phases of the scheme in motion on
    the morning of November 29.     At approximately 8:00 a.m., Torres
    and Hernández proceeded to the credit union to carry out that
    aspect of the plot.    The appellant had instructed Torres to enter
    the credit union and pretend to cash a check, at which point he
    would be "taken hostage" by Figueroa.       Hernández was to serve as
    the lookout.
    What happened next was reminiscent of the legendary gang
    that couldn't shoot straight.        See Jimmy Breslin, The Gang That
    Couldn't Shoot Straight (1969).       Torres entered the credit union
    but Figueroa never appeared.      Consequently, Torres retreated in
    confusion and the holdup at the credit union never materialized.
    Meanwhile,   acting   on    the   appellant's   instructions,
    Camacho and Figueroa planted two bogus bombs furnished by the
    appellant — one near the ATM outside Bayamón City Hall and the
    other outside a Banco Popular branch in Loma Verde.        Although the
    record is nebulous as to when and how the bogus bombs were first
    - 4 -
    spotted, the local police force soon responded to reports about
    suspicious objects.        The officers deployed specialized personnel
    to defuse any discovered explosives.
    With the distraction operation underway, the robbers
    proceeded to enter the Banco Popular branch in Bayamón. We already
    have chronicled what transpired inside the bank.                See text supra.
    Both local police and agents of the Federal Bureau of
    Investigation (FBI) responded to the scene of this robbery.                    It
    did not take long for them to discover the abandoned Toyota a
    quarter   mile     from   the   bank,    dye-stained    money    littering    the
    interior.    A discarded construction helmet and black gloves were
    found in a nearby trash can.        The Toyota yielded another important
    clue:   a receipt, found in the back seat, documented a transaction
    that had taken place four days earlier at a Party City store in
    San Patricio.      Surveillance footage obtained from the store showed
    the appellant, Hernández, and a third man purchasing fake facial
    hair products that matched those used by the robbers.
    When    the   FBI   detained    Hernández    for    questioning    in
    December of 2014, he made a number of incriminating statements
    during a six-hour interview.            He admitted, for example, that he
    had participated in surveilling the bank, that he had accompanied
    the appellant both to Party City and to Home Depot to purchase
    accouterments similar to those used in effectuating the robbers'
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    disguises, and that he had transported a shotgun to the appellant's
    home in the Barrio Macún neighborhood for use in the heist.
    On January 9, 2015, the FBI obtained both an arrest
    warrant for the appellant and a search warrant for his home.           The
    ensuing search turned up (as relevant here) ammunition rounds,
    fake facial hair, and black gloves (still bearing manufacturer's
    tags) identical to those discovered near the abandoned Toyota.
    Following    the    search,    the   appellant   submitted   to
    interviews.     He described himself as a former police officer who
    had transitioned into construction work.           He admitted that he
    previously had owned the Toyota used in the escape but claimed to
    have sold it on the morning of the robbery.         He also admitted to
    making purchases at Party City and Home Depot during the week
    before the robbery, but he claimed that those purchases were made
    for innocent purposes.
    B
    The     appellant   was   charged,     alongside    Hernández,
    Figueroa, Dávila, Camacho, and Torres, in a five-count indictment.1
    The charges included conspiracy to commit bank robbery, see 18
    1 On the same day, the appellant was separately indicted for
    possession of ammunition as a convicted felon and possession of
    marijuana with intent to distribute (Criminal Case No. 15-78).
    These charges arose out of the discovery of contraband during the
    execution of the search warrant at the appellant's home.     This
    second indictment, which was tried before a different district
    judge, is not before us.
    - 6 -
    U.S.C. § 371; armed bank robbery, see id. § 2113(a); conspiracy to
    commit Hobbs Act robbery, see id. § 1951(a); Hobbs Act robbery,
    see id. § 1951(a); and use and carriage of firearms during and in
    relation to crimes of violence, see id. § 924(c)(1)(A)(ii).
    Four of the defendants eventually entered guilty pleas
    and two of them (Dávila and Torres) agreed to become cooperating
    witnesses   for    the   government.      The    appellant   and   Hernández
    proceeded to stand trial.
    The impending trial proved fertile terrain for extensive
    pretrial motion practice.      The district court dealt with questions
    concerning subjects as diverse as severance, protective orders,
    and the sometimes stormy relationship between the appellant and
    his trial counsel (Melanie Carrillo).           The trial, which lasted for
    14 days, was tumultuous.      The appellant appeared in court on the
    first   day,   but   his   appearance   was     short-lived.       He   became
    increasingly agitated and loudly declared that the trial should
    not proceed.      When his disruptive behavior escalated, the court
    had him escorted from the courtroom, and he listened to and watched
    most of the trial virtually from a remote cellblock.               The court
    appointed a second lawyer to be at the appellant's side in the
    cellblock during trial proceedings.
    On the ninth day of trial, the appellant was allowed
    into the courtroom after having assured the court that he would
    conduct himself appropriately. That assurance proved hollow: once
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    in   the   courtroom,   he   loudly   disparaged    Carrillo   and    hurled
    accusations at the district court in front of the jury.          The court
    again ordered the appellant removed from the courtroom and denied
    his ensuing motion for a mistrial.
    At the close of the government's case, the appellant
    moved for judgment of acquittal.        See Fed. R. Crim. P. 29(a).        The
    district court denied this motion but permitted the government to
    reopen its case in chief to clarify certain jurisdictional elements
    of the crimes (not now in issue).        The jury ultimately found both
    the appellant and Hernández guilty on all five counts.                     The
    district    court   subsequently      sentenced    the   appellant    to   an
    aggregate 228-month term of immurement (the components of which
    are delineated in Part X, infra).        In addition, the court ordered
    the appellant to make restitution to Banco Popular in the sum of
    $64,000.
    This timely appeal ensued.     Hernández also appealed, but
    his appeal has been separately adjudicated.          See United States v.
    Hernández-Román, 
    981 F.3d 138
     (1st Cir. 2020).           In the pages that
    follow, we set forth the standards of review that variously apply
    to the appellant's manifold claims of error. We then discuss these
    claims in roughly the order in which they surfaced below.            We treat
    them all as either preserved or deemed to be preserved, unless
    otherwise indicated.     Other claims of error, as to which further
    - 8 -
    discussion     would   be   pleonastic,        are   patently     meritless,
    insufficiently developed, or both.
    II
    The    appellant's   claims     of    error   trigger     familiar
    standards of review. To begin, we review preserved claims of legal
    error (that is, claims that turn on pure questions of law) de novo.
    See United States v. Simpkins, 
    978 F.3d 1
    , 6 (1st Cir. 2020);
    United States v. Pinkham, 
    896 F.3d 133
    , 137 (1st Cir. 2018).              In
    contrast, we evaluate the district court's factfinding only for
    clear error.    See United States v. Tanguay, 
    811 F.3d 78
    , 81 (1st
    Cir. 2016); United States v. Matos, 
    328 F.3d 34
    , 38 (1st Cir.
    2003).   On clear error review, we will "not . . . upset findings
    of fact or conclusions drawn therefrom unless, on the whole of the
    record, we form a strong, unyielding belief that a mistake has
    been made."     Cumpiano v. Banco Santander P.R., 
    902 F.2d 148
    , 152
    (1st Cir. 1990).
    When a defendant interposes a contemporaneous objection
    at trial — challenging, say, an evidentiary ruling or the phrasing
    of a jury instruction — we ordinarily review the district court's
    actions for abuse of discretion.          See, e.g., United States v.
    Griffin, 
    818 F.2d 97
    , 99-100 (1st Cir. 1987) (describing rationale
    for requirement that litigants "alert the district judge to error-
    in-the-making when and as the occasion arises").                The abuse of
    discretion standard is not monolithic but, rather, encompasses "de
    - 9 -
    novo review of abstract questions of law, clear error review of
    findings of fact, and deferential review of judgment calls."
    United States v. Lewis, 
    517 F.3d 20
    , 24 (1st Cir. 2008) (footnote
    omitted).     The variegated nature of this standard is consistent
    with a recognition that a district court exercises considerable
    latitude with respect to many aspects of a trial.    See Indep. Oil
    & Chem. Workers of Quincy, Inc. v. Procter & Gamble Mfg. Co., 
    864 F.2d 927
    , 929 (1st Cir. 1988).
    Different rules obtain when a party remains silent at
    trial only to surface a claim of error for the first time on
    appeal.     In such an event, appellate review is ordinarily limited
    to plain error.    See United States v. Rodriguez, 
    919 F.3d 629
    , 634
    (1st Cir. 2019).      The proponent of plain error must carry the
    devoir of persuasion as to each of four showings:      "(1) that an
    error occurred (2) which was clear or obvious and which not only
    (3) affected the defendant's substantial rights, but also (4)
    seriously impaired the fairness, integrity, or public reputation
    of judicial proceedings."     United States v. Duarte, 
    246 F.3d 56
    ,
    60 (1st Cir. 2001).     In practice, the plain error doctrine allows
    an appellate court to correct egregious missteps but not the
    "ordinary backfires" that are apt to occur during any trial.
    Griffin, 
    818 F.2d at 100
    .
    Of course, a party sometimes may identify an issue at
    trial but then "relinquish[] or abandon[]" any objection to it.
    - 10 -
    United States v. Rodriguez, 
    311 F.3d 435
    , 437 (1st Cir. 2002).             In
    such circumstances, we generally consider the argument waived.
    See   
    id.
         Once   waived,   an   argument    is   dead   and   cannot   be
    resuscitated on appeal.        See United States v. Coleman, 
    884 F.3d 67
    , 71 (1st Cir. 2018).
    These several standards variously inform our subsequent
    discussion of the appellant's claims.
    III
    Our appraisal of the appellant's asseverational array
    begins with his claim that the district court abused its discretion
    by denying his pretrial motion to sever his case from that of his
    codefendant (Hernández).        See Fed. R. Crim. P. 14(a) ("If the
    joinder of offenses or defendants . . . appears to prejudice a
    defendant or the government, the court may order separate trials
    of counts, sever the defendants' trials, or provide any other
    relief that justice requires.").           Where, as here, defendants are
    charged with the same crimes in the same indictment, joinder is
    prima facie appropriate and severance ordinarily will not lie.
    See Fed. R. Crim. P. 8(b); United States v. Houle, 
    237 F.3d 71
    ,
    75-76 (1st Cir. 2001).     But this general rule — like most general
    rules — admits of exceptions.
    The appellant asserts that such an exception applies in
    this case.    The impetus for his severance motion draws its essence
    from Hernández's December 2014 interviews with the FBI.              During
    - 11 -
    those sessions, Hernández made statements that inculpated both
    himself and the appellant in the charged crimes.                  Although there
    is no evidence that the appellant set foot in either the Banco
    Popular branch bank or the credit union, Hernández's narrative
    identified    him     as    having   been   involved      in    virtually    every
    preparatory step.
    Aware of Hernández's confession, the appellant filed a
    pretrial     motion        for   severance,     arguing        that    Hernández's
    statements, if introduced into evidence at a joint trial, would
    violate his Sixth Amendment rights.             See Bruton v. United States,
    
    391 U.S. 123
    ,   137     (1968)   (holding    that   a      defendant's   Sixth
    Amendment right to confront his accusers through cross-examination
    is abridged when the incriminating statements of a nontestifying
    codefendant are admitted at trial).              He also argued that "where
    the   powerfully      incriminating     extrajudicial          statements    of   a
    codefendant, who stands accused side-by-side with the defendant,
    are deliberately spread before the jury in a joint trial," a court
    cannot employ "limiting instructions as an adequate substitute for
    [the defendant's] constitutional right of cross-examination."
    Faced with the appellant's motion, both the government
    and the district court recognized that the Bruton rule does not
    present courts with an all-or-nothing proposition.                    The case law
    makes manifest that redaction is an acceptable means of curing a
    potential Bruton violation.           See Richardson v. Marsh, 481 U.S.
    - 12 -
    200, 209 (1987). Even so, prophylactic revisions must be carefully
    tailored in order to satisfy the Bruton standard.                Put another
    way, the law recognizes that a clumsy or incomplete modification
    may still point unerringly to a nontestifying defendant.              See Gray
    v. Maryland, 
    523 U.S. 185
    , 188 (1998).           On appeal, we must assay
    "the efficacy of redaction on a case-by-case basis, paying careful
    attention to both a statement's text and the context in which it
    is offered."    Foxworth v. St. Amand, 
    570 F.3d 414
    , 433 (1st Cir.
    2009).
    In the case at hand, the government responded to the
    appellant's severance motion by advising the district court that
    it had a plan to avoid potential Bruton pitfalls.             It would elicit
    evidence of Hernández's confession only through the testimony of
    a law enforcement officer rather than by proffering, say, a tape
    recording or written transcript.         Relatedly, it would ensure that
    the testifying officer substituted generic phrases (e.g., "another
    person")   in   lieu    of    Hernández's    specific   references     to   the
    appellant.      Based    on    these   representations    —    and   with   the
    acquiescence of the appellant's trial counsel — the district court
    denied the severance motion.
    On the first day of trial, the parties and the district
    court again discussed Hernández's statements.                 The government
    acknowledged its awareness of the potential Bruton issue and
    assured the court that the proposed agent-witness "ha[d] been
    - 13 -
    instructed"   in   line   with   the   earlier   agreement.   The   court
    interrupted, noting that the agreement was that "[a]ny statement
    made by a co-defendant will not be stated as to him."                The
    appellant's trial counsel responded in a single word: "[e]xactly."
    During the trial, the government called the FBI agent to
    testify about Hernández's statements.            At that juncture, the
    appellant's trial counsel questioned whether, even with the use of
    generic references that "sanitized" the agent's testimony to the
    extent the government had represented, the jury nonetheless might
    identify the appellant as one of the persons who visited Home Depot
    and Party City. The prosecutor responded that the government would
    take care to "lead [the agent] through these questions and we'll
    avoid the Bruton issue." Following this assurance, the appellant's
    counsel did not press her objection. The district court apparently
    deemed it withdrawn,2 see United States v. Rogers, 
    918 F.2d 207
    ,
    212 (D.C. Cir. 1990) (describing objecting party's burden "to make
    clear to the district court that he is pressing his point" (quoting
    Krause v. Chartier, 
    406 F.2d 898
    , 901 (1st Cir. 1968))); cf. United
    States v. Potts, 
    644 F.3d 233
    , 235-36 (5th Cir. 2011) (deeming
    claim unpreserved when objecting party failed to "reassert his
    2 The district court made no formal ruling but merely told
    the parties to "[g]o ahead." On appeal, the appellant makes no
    mention of this colloquy; but in his reply brief, he acknowledges
    that his trial "counsel did not object to the Government's proposed
    solution" to the potential Bruton issue.
    - 14 -
    objection"     subsequent        to    proposed    curative     action),    and   the
    prosecutor      conducted        the     remainder     of   the    examination    in
    accordance with her assurance.
    Against this backdrop, the appellant mounts a claim that
    the district court's decision to allow the agent's testimony
    constituted an abuse of discretion.                The lynchpin of his argument
    is     that   the    government's        proposed      redaction    insufficiently
    neutralized the incriminating impact of Hernández's statements and
    that, therefore, the district court should have severed the trials
    of the two defendants.
    In examining this claim of error, Bruton and its progeny
    would normally supply the guardrails that we must honor.                       Here,
    however, there is a bend in the road:                  although appellate review
    of a Bruton challenge is ordinarily de novo, see United States v.
    Vega    Molina,     
    407 F.3d 511
    ,    519   (1st    Cir.   2005),   the   record
    indicates that the appellant waived this line of argument below.
    See United States v. Olano, 
    507 U.S. 725
    , 733 (1993) ("[W]aiver is
    the 'intentional relinquishment or abandonment of a known right.'"
    (quoting Johnson v. Zerbst, 
    304 U.S. 458
    , 464 (1938))). We explain
    briefly.
    The    Bruton      issue     first     surfaced      at   a   pretrial
    conference, prompted by the appellant's severance motion.                     At this
    conference, the prosecutor spelled out the government's planned
    procedure for handling Hernández's confession.                     The appellant's
    - 15 -
    trial   counsel   assented   to   the   prosecutor's    proposal,   stating
    explicitly that the appellant "ha[d] no objection" to going forward
    in the manner described.      And on the first day of trial, counsel
    verified that the parties had agreed to proceed in this manner.
    Counsel's statements satisfy the accepted definition of
    waiver.    She expressly acknowledged the appellant's potential
    Bruton claim and, in response to the prosecutor's representations,
    deliberately relinquished this appreciated right.          So viewed, the
    waiver doctrine "fits this case like a glove."           United States v.
    Orsini, 
    907 F.3d 115
    , 120 (1st Cir. 2018).
    The appellant has a fallback position.         He contends for
    the first time on appeal that the presentation of Hernández's
    redacted confession, when viewed alongside certain other trial
    evidence, allowed the jury to infer that the appellant was the
    unnamed individual mentioned in the agent's redacted account of
    Hernández's statement.       In particular, the appellant emphasizes
    the   prosecutor's   statement    during    closing    argument   that   the
    appellant lived in Barrio Macún.           This links up, the appellant
    suggests, with a statement in Hernández's confession to the effect
    that he (Hernández) delivered a shotgun to a person residing in
    Barrio Macún for use in the Banco Popular robbery.
    Even apart from the fact of the appellant's waiver, this
    is whistling past the graveyard.        The Supreme Court has held that
    an out-of-court confession of a non-testifying defendant that only
    - 16 -
    "inferential[ly] incriminat[es]" a codefendant who is on trial
    through deductive links to other evidence does not animate that
    codefendant's Sixth Amendment concerns in the same manner as a
    head-on accusation.      Richardson, 481 U.S. at 208.          That is the
    situation here, and we discern no error — plain or otherwise — in
    connection with this unpreserved claim of error.
    IV
    Next, the appellant contends that the district court
    abused its discretion in granting a protective order relating to
    certain discovery materials.        Some stage-setting is useful.
    Prior to trial, the government fulfilled its obligation
    under the Jencks Act to disclose certain evidentiary materials to
    the defense.    See 
    18 U.S.C. § 3500
    (b); see also United States v.
    Sepúlveda-Hernández, 
    752 F.3d 22
    , 32 (1st Cir. 2014) (explaining
    that "[t]he Jencks Act obliges the government . . . to proffer
    upon a defendant's timely request any statement of [a particular]
    witness in its possession, whether or not exculpatory, that relates
    to   the   subject   matter   of   the    witness's   testimony").   These
    materials included transcripts of grand jury testimony given by
    two of the government's cooperating witnesses (Dávila and Torres).
    Citing security concerns,3 the government asked the district court
    The government's initial motion for a protective order cited
    3
    the appellant's potential exposure to "lengthy periods of
    incarceration" as a likely incentive for him to "resort to extreme
    measures." When the appellant later questioned the need for the
    - 17 -
    for a protective order barring defense counsel from leaving copies
    of    the   cooperators'       statements    with      the     appellant    (although
    counsel would remain at liberty to review the contents of those
    statements with him).          The district court granted the government's
    motion and rejected the appellant's subsequent efforts to vacate
    or modify the protective order — efforts that included attacks on
    the protective order both at the beginning of the trial and in a
    post-conviction motion.
    The    appellant     argues    that    the      protective    order    was
    "[un]substantiated by fact" and issued "blindly."                     Even though the
    protective order allowed the appellant's counsel to review the
    Jencks      Act    materials     with   him,     the    appellant       brands     this
    accommodation       as    ineffectual      in    view     of    the     dysfunctional
    relationship between the two.            Thus, the appellant concludes, the
    terms of the order deprived him of his Sixth Amendment right to
    assist meaningfully in his own defense.                 See McKaskle v. Wiggins,
    
    465 U.S. 168
    ,    174      (1984)       ("The         [Sixth      Amendment]
    . . . implies a right in the defendant to conduct his own defense,
    with assistance at what, after all, is his, not counsel's trial.");
    order, the government explained that two prospective witnesses
    against the appellant had recently become unavailable. One was in
    a vegetative state because he had fallen (or been pushed) off a
    jail roof; the other had declined to afford any cooperation after
    the murder of his wife. Despite the lack of any evidence that the
    appellant was directly involved in either incident, the government
    argued that this pattern of events justified incremental security
    measures.
    - 18 -
    LaChappelle v. Moran, 
    699 F.2d 560
    , 564 (1st Cir. 1983) ("A central
    principle derived from the confrontation clause [of the Sixth
    Amendment] is the defendant's right to participate in his own
    defense.").
    The Criminal Rules require that a movant demonstrate
    "good cause" for a protective order.                 Fed. R. Crim. P. 16(d)(1);
    see United States v. Wecht, 
    484 F.3d 194
    , 211 (3d Cir. 2007).                                 In
    turn, "[a] finding of good cause must be based on a particular
    factual   demonstration         of   potential       harm,    not       on    conclusory
    statements."      Anderson v. Cryovac, Inc., 
    805 F.2d 1
    , 7 (1st Cir.
    1986).      We   review   the    district        court's    decision         to       grant   a
    protective order for abuse of discretion.                    See United States v.
    Rosario-Peralta, 
    175 F.3d 48
    , 55 (1st Cir. 1999).                       In conducting
    this tamisage, we remain mindful that district courts possess
    considerable     latitude       both       in   determining       whether         to    issue
    protective orders and in fashioning their terms.                     See Danny B. ex
    rel. Elliott v. Raimondo, 
    784 F.3d 825
    , 834 (1st Cir. 2015).                                  We
    will reverse the grant of a protective order only "when it is
    sufficiently     prejudicial         and    based    upon    an    incorrect            legal
    standard or a misapplication of law to fact."                     
    Id.
    Applying these constructs, we conclude that the district
    court's protective order passes muster.                    At the first step, the
    appellant    acknowledges        that      witness    protection         is       a    proper
    rationale for a protective order.                See Fed. R. Crim. P. 16(d)(1)
    - 19 -
    advisory committee's note to 1966 amendment (confirming that "the
    safety of witnesses" and "witness intimidation" are proper bases
    for protective order).       Although there is no direct evidence that
    the appellant was responsible for the sudden unavailability of two
    prospective witnesses against him, the pattern of harm described
    by the government in chambers was both sufficiently specific and
    sufficiently worrisome to ground the precautionary measures.            See,
    e.g., United States v. Ramos-Cruz, 
    667 F.3d 487
    , 501 (4th Cir.
    2012) (deeming heightened threat "sufficient[ly]" specific to
    sustain protective order, allowing witnesses to testify under
    pseudonyms, even though defendant was "not himself accused of
    threatening [] witnesses"); United States v. Celis, 
    608 F.3d 818
    ,
    832 (D.C. Cir. 2010) (affirming protective order despite lack of
    showing   that    any   appellant     "had   personally   threatened    any
    government witness").     Thus, the district court did not abuse its
    discretion in concluding that the government had shown good cause
    for the issuance of the protective order.
    To cinch the matter, there is no reason to believe that
    the   appellant   suffered    any   cognizable   prejudice   due   to   the
    protective order. The appellant was not entitled to receive Jencks
    Act materials as to a particular witness until that witness had
    testified on direct examination.         See Fed. R. Crim. P. 26.2(a);
    see also United States v. Jones, 
    612 F.2d 453
    , 455 (9th Cir. 1979)
    ("Appellant's reliance on the Jencks Act as a pre-trial discovery
    - 20 -
    tool is completely misplaced. . . . [T]he Act specifically provides
    that no statement of a government witness is discoverable until
    the    witness   has     testified     on    direct   examination.").         Dávila
    testified on the sixth day of trial and Torres testified on the
    ninth day.     Yet, the government delivered the Jencks Act materials
    relative to both cooperating witnesses to defense counsel several
    days before trial commenced.            This extra time offset (at least to
    a substantial extent) the unavailability of the materials in the
    defendant's cell.            See, e.g., United States v. Dukes, 
    758 F.3d 932
    ,    938   n.4     (8th    Cir.   2014)   (rejecting    defendant's    claimed
    entitlement to extra time             for personal       review of Jencks Act
    materials      when     materials     had    been     supplied   ahead   of    jury
    selection); United States v. Nicolapolous, 
    30 F.3d 381
    , 383-84 (2d
    Cir. 1994) (finding no prejudice resulted from defendants' "lack
    of unconditional access" to Jencks Act materials).                And the record
    reflects that the appellant took due advantage of this opportunity
    to preview the Jencks Act materials:                he and his lawyer reviewed
    at least half of the materials before a jury was even empaneled.
    Nor do we think that this conclusion is undermined by
    the appellant's claim that he had a dysfunctional relationship
    with his trial counsel.          The claim of a dysfunctional relationship
    was made below in connection with trial counsel's pretrial motion
    to withdraw, and the district court — after a hearing in which the
    appellant himself participated — denied the motion.                The appellant
    - 21 -
    has not appealed from that ruling, and there is no basis for us to
    second-guess the district court's on-the-spot determination that
    the relationship between the appellant and his trial counsel was
    functional.   See United States v. Jones, 
    778 F.3d 375
    , 388 (1st
    Cir. 2015).
    No more need be said.     Striking a balance between a
    defendant's rights and the need to protect witnesses must be left,
    in the first instance, to the sound judgment of the district court.
    See, e.g., United States v. El-Mezain, 
    664 F.3d 467
    , 492-93 (5th
    Cir. 2011).   From what we can tell, the court below held that
    delicate balance steady and true.
    On this record, we are satisfied that the court did not
    abuse its discretion either in issuing the protective order or in
    determining that the appellant had an adequate opportunity to
    familiarize himself with the Jencks Act materials.      See United
    States v. Arboleda, 
    929 F.2d 858
    , 863-64 (1st Cir. 1991).
    The appellant's invocation of the Sixth Amendment does
    not advance his cause.    He contends that the protective order
    deprived him of the opportunity to assist in his own defense
    because he could neither study the Jencks Act materials ahead of
    trial nor adequately confer with his lawyer during the trial
    itself.   This contention, though, comprises more cry than wool.
    The appellant had no pretrial right to the Jencks Act materials,
    and any limitations on his ability to consult with trial counsel
    - 22 -
    concerning those materials were the direct result of his own
    intentionally disruptive behavior (which caused him to be excluded
    from the courtroom for most of the trial).4     On these facts, we
    discern no   Sixth Amendment   violation.    See United States    v.
    Cordova, 
    806 F.3d 1085
    , 1090-91 (D.C. Cir. 2015); United States v.
    Rivera, 
    153 F. App'x 758
    , 760 (2d Cir. 2005) (finding no Sixth
    Amendment infringement by a protective order preventing defendant
    from retaining Jencks Act materials at his detention facility).
    V
    Relatedly, the appellant argues that the district court
    abused its discretion by declining to order the government to
    produce notes supposedly taken by law enforcement agents who
    interviewed a cooperating witness (Dávila).     This argument runs
    headlong into a threshold obstacle:     it is luminously clear that
    the existence of Jencks Act materials is an implicit precondition
    to the government's obligation to produce those materials.       See
    United States v. Amaya-Manzanares, 
    377 F.3d 39
    , 42-43 (1st Cir.
    2004); United States v. Nickell, 
    552 F.2d 684
    , 689 (6th Cir. 1977).
    4 We hasten to add that even though the appellant was confined
    to the cellblock for most of the trial, the district court made
    certain that he had an appointed lawyer by his side. This second
    lawyer's duties included answering the appellant's questions and
    conveying "idea[s]" back to the courtroom. There is no reason why
    this lawyer could not have reviewed Jencks Act materials with the
    appellant during the trial.
    - 23 -
    In this case, the appellant has not shown that any such notes ever
    existed.
    The relevant facts are uncomplicated.          The appellant's
    claim has its origins in his attorney's cross-examination of
    Dávila.     One line of questioning dealt with how many times Dávila
    had been interviewed by representatives of law enforcement and at
    which meetings notes were taken.               From Dávila's replies, the
    appellant's attorney seemingly came up with a hunch that the
    government possessed agent notes, comprising Jencks Act materials,
    that it had failed to disclose.            See United States v. Neal, 
    36 F.3d 1190
    , 1196-97 (1st Cir. 1999).              The government repeatedly
    denied    the    existence   of   any   such   notes.   Lacking   a   tenable
    foundation for a conclusion that any such notes had been prepared,
    the district court refused to order their production.
    We discern no abuse of the district court's discretion.
    Where, as here, a Jencks Act claim surfaces, the district court
    must      "conduct     an    independent       investigation"     into   the
    discoverability of the disputed materials.               United States v.
    Landrón-Class, 
    696 F.3d 62
    , 73 (1st Cir. 2012) (quoting United
    States v. Gonzalez-Melendez, 
    570 F.3d 1
    , 3 (1st Cir. 2009) (per
    curiam)).       The court below satisfied this obligation by eliciting
    testimony from Agent Tews (one of the agents present at Dávila's
    interviews) about the extent of any notetaking activity. The court
    found credible the agent's testimony that no notes had been taken.
    - 24 -
    This inquiry was an appropriate way in which to resolve the dispute
    over the existence vel non of the notes,5 see United States v.
    Gonzalez-Melendez, 
    594 F.3d 28
    , 35-36 (1st Cir. 2010), and the
    court's finding that no notes existed was not clearly erroneous.
    Indeed, the court spent appreciable time attempting to help Dávila
    parse the relevant distinctions between her initial interviews by
    law enforcement personnel and her subsequent trial-preparation
    sessions as a cooperating witness.
    That ends this aspect of the matter. Although the Jencks
    Act imposes a solemn obligation on the government in a criminal
    case, the government cannot be expected to produce that which has
    never existed.     The appellant's claim of error therefore fails.
    VI
    This brings us to the appellant's mid-trial outburst.
    As previously explained, the appellant observed most of the trial
    virtually   from   his   cellblock6    but   the   court   gave   in   to   his
    entreaties on the ninth day of trial and allowed him to come to
    the courtroom.     This concession was premised on the appellant's
    assurance that he would abide by the usual rules of courtroom
    5  The prosecutor contemporaneously argued that Dávila's
    inconsistencies were attributable to the combination of a language
    barrier and confusion over which interviews the cross-examiner was
    targeting.
    6 The appellant does not advance any claim of error relating
    to the district court's original decision to exclude him from the
    courtroom. We therefore omit any more elaborate discussion of the
    circumstances undergirding that decision.
    - 25 -
    decorum.   That assurance proved to be mere window dressing:    once
    in the courtroom, the appellant launched into a voluble tirade in
    front of the jury.     The record does not precisely capture the
    appellant's comments, which were delivered in Spanish.      However,
    the appellant's counsel subsequently described the essence of the
    outburst in the following terms:
    [W]hat [the appellant] said is that the judge
    forced him to go to trial . . . [and he]
    basically said I forced him. That I was lazy,
    that I was not defending him as I was supposed
    to, and that I was not doing my job.      And,
    basically, everyone was against him.
    The district court endorsed this summary, and we — like the parties
    — treat it as a fair representation of what the appellant actually
    said.
    In this venue, the appellant characterizes his pent-up
    frustration with his trial counsel as the trigger for his outburst.
    Building on that foundation, he argues that the district court
    abused its discretion by denying his ensuing mistrial motion.     In
    his estimation, witnessing the scene necessarily prejudiced the
    jury against him and — to make a bad situation worse — his comments
    may have been construed as an admission of guilt.
    Appellate review of the denial of a mistrial motion is
    for abuse of discretion.   See United States v. Lee, 
    317 F.3d 26
    ,
    34 (1st Cir. 2003).   This is a deferential standard:    "[o]nly in
    rare instances will we . . . substitute our judgment for the trial
    - 26 -
    court's first-hand determination that the interests of justice
    could be served without aborting a trial already in progress."
    United States v. Rodríguez-Vélez, 
    597 F.3d 32
    , 43 (1st Cir. 2010).
    In this instance, deference is especially appropriate because the
    appellant's      mistrial   motion     is   premised      on   his     own    conduct,
    witnessed   at     firsthand     by   the   district      court.        The     court,
    therefore, had a unique opportunity to see and hear the outburst
    and to gauge its effects on the jury in real time.
    Here, moreover, the genesis of the mistrial motion must
    be factored into the mix.             We previously have considered — and
    decisively rejected — the argument that a defendant can force a
    mistrial in a criminal case by the simple expedient of behaving
    badly   before     the   jury.    See    
    id.
       (explaining       that        "[w]hen   a
    defendant has willfully disrupted the proceedings, a trial court
    ordinarily acts within its discretion in refusing to grant a
    mistrial by reason of that disruption").               To rule otherwise would
    create a "perverse incentive[]" for a defendant to throw any
    semblance of decorum to the winds.               Id.; see United States v.
    McCormac, 
    309 F.3d 623
    , 626 (9th Cir. 2002).
    The    appellant     struggles     to   put    his    outburst       in    a
    different light.         He tries to distinguish Rodríguez-Vélez and
    similar cases on the ground that those cases — unlike this case —
    involved    only    "comments     [which]      themselves        did    not     impart
    information prejudicial to the defense."                   He argues that, by
    - 27 -
    contrast, his comments can reasonably be construed as an admission
    of guilt (an argument to which we shortly shall return).
    The distinction that the appellant labors to draw is one
    of degree, not of kind.        Whatever the content of a defendant's
    comments made in the course of a courtroom outburst, the same
    principles must guide an appellate court's appraisal of whether
    the district court abused its discretion in denying an ensuing
    mistrial motion.     See United States v. Harris, 
    2 F.3d 1452
    , 1456
    (7th Cir. 1993); United States v. West, 
    877 F.2d 281
    , 288 (4th
    Cir. 1989).
    Of course, abuse-of-discretion review does not denote
    that a district court is free to turn a blind eye and a deaf ear
    to the effect of a defendant's antics.         In the wake of such an
    outburst, a trial court is obliged to take reasonable steps to
    mitigate "any untoward effects that the outburst might have on the
    jury."   Rodríguez-Vélez, 
    597 F.3d at 43
    .            Sensitive to this
    obligation,    the   court   below   immediately   gave   a   prophylactic
    instruction:
    [N]othing stated by Mr. José Padilla is to be
    taken by you as evidence in the case, nor can
    you use his expressions, that is, the conduct
    that you saw. That is not evidence in this
    case . . . I address it standing up because I
    want you to take that instruction that you
    just heard seriously, as important as any
    other instruction that I may provide, have
    provided, or will provide.
    - 28 -
    This instruction was well-phrased and delivered in a timely manner.
    As with all jury instructions, we must presume — in the absence of
    any evidence to the contrary — that the jurors heeded it.                        See
    Richardson, 481 U.S. at 206; United States v. Sepulveda, 
    15 F.3d 1161
    , 1185 (1st Cir. 1993).
    The appellant's related argument — that the jury likely
    perceived his comment that "the judge forced him to go to trial"
    as an admission of guilt — suffers from a lack of development.
    See United States v. Zannino, 
    895 F.2d 1
    , 17 (1st Cir. 1990)
    (elucidating        need   for   "developed       argumentation").    While      the
    appellant asserts that the words "impl[y]" his guilt, he does not
    give       any   rationale   for   the     self-serving    claim   that   such    an
    implication was inherent in his remark.                   And in any event, the
    district court's prophylactic instruction sapped the force of
    anything that was said.              It is, therefore, unsurprising that
    similar statements by defendants in other cases have been held not
    to mandate the declaration of a mistrial.7                 See, e.g., McCormac,
    
    309 F.3d at 625
     (discussing defendant's vocal refusal to proceed
    with trial because it was "a biased situation"); Harris, 
    2 F.3d at 1454
           (finding   district     court    acted    appropriately   in   denying
    In an effort to construct an off-ramp, the appellant cites
    7
    Arizona v. Washington, 
    434 U.S. 497
     (1978). This off-ramp goes
    nowhere: the Court's opinion in Washington addressed prejudicial
    conduct by defense counsel, to the detriment of the prosecution.
    See 
    id. at 499-500
    . Nothing comparable occurred here.
    - 29 -
    mistrial after defendant asserted in front of jury that "he was
    being tried against his will").
    In sum, the appellant's outburst in the courtroom may
    have placed him in an unflattering light.                  But if that is so, the
    appellant was the architect of his own misfortune.                   Faced with an
    incipient    problem     of    the     appellant's     contrivance,       the     able
    district      court      handled        the      matter      with      considerable
    circumspection.       The court's prompt intervention and its carefully
    chosen words minimized any potential for prejudice.                          We thus
    discern no abuse of discretion in the court's denial of the
    appellant's motion for a mistrial.
    VII
    The   next    stop    on     our    itinerary     brings    us   to   the
    appellant's    claims    of    improper        vouching.      As    relevant    here,
    vouching occurs when a prosecutor tries to bolster the government's
    case by implying "personal belief in a witness's veracity or
    [suggesting]      that   the     jury    should    credit     the    prosecution's
    evidence simply because the government can be trusted."                        United
    States v. Rodríguez-Adorno, 
    695 F.3d 32
    , 40 (1st Cir. 2012)
    (quoting United States v. Valdivia, 
    680 F.3d 33
    , 49 (1st Cir.
    2012)).     So, too, vouching may occur when the trial judge's
    comments convey this same sort of message.                 See Rush v. Smith, 
    56 F.3d 918
    , 921-22 (8th Cir. 1995) (explaining that "the influence
    of the trial judge on the jury is necessarily and properly of great
    - 30 -
    weight" and that the judge's "lightest word or intimation is
    received with deference, and may prove controlling" (quoting Starr
    v. United States, 
    153 U.S. 614
    , 626 (1894))).
    Plotting the dividing line between permissible comments
    and impermissible vouching can be difficult.        See United States v.
    Innamorati, 
    996 F.2d 456
    , 483 (1st Cir. 1993) (describing this
    line as "hazy"). Special caution is required in instances in which
    "[a] prosecutor flaunts the government's skills and purity of
    motive or where the context . . . impl[ies] private knowledge of
    the defendant's guilt that unfortunately cannot be shared with the
    jury."   United States v. Gomes, 
    642 F.3d 43
    , 47 (1st Cir. 2011).
    In   this   case,   the    appellant   alleges   that   both   the
    prosecutor and the court improperly vouched for the credibility of
    a cooperating witness (Dávila).       The prosecutor, he avers, crossed
    the line by emphasizing during closing argument that Dávila was
    "required to tell the truth" as a condition of her plea agreement.
    The district court, he avers, crossed the line by describing Dávila
    as "a cooperator for the United States of America."         The appellant
    exhorts us to find that each of these comments had the forbidden
    effect of placing the prestige of the United States behind Dávila's
    testimony.
    - 31 -
    The   appellant    made   no   contemporaneous   objection   to
    either of the comments that he now calumnizes.8               Our review,
    therefore, is for plain error. See Duarte, 
    246 F.3d at 60
    . Neither
    aspect of the appellant's vouching challenge clears this bar.
    A
    Dávila's plea agreement with the government was admitted
    into evidence without objection.           This is a salient fact because
    it is common ground that a prosecutor may "point[] to specific
    record evidence (e.g., a plea agreement), and suggest[] to the
    jury how these particular facts may have provided the witness with
    an incentive to testify truthfully."           United States v. Page, 
    521 F.3d 101
    , 107 (1st Cir. 2008); see United States v. Hansen, 
    434 F.3d 92
    , 101 (1st Cir. 2006).         Here, the prosecutor's challenged
    comment was of this genre:            the prosecutor merely restated a
    condition of Dávila's plea agreement, already in evidence, without
    incorporating either "personal assurances" or any suggestion that
    "facts not before the jury support[ed] the witness's testimony."
    United States v. Rosario-Diaz, 
    202 F.3d 54
    , 65 (1st. Cir 2000).
    Nor   do   we   accept   the   appellant's   argument,   tendered   without
    8Hernández did object to the prosecutor's statement on the
    ground of improper vouching.     But a codefendant's objection,
    without more, does not preserve any other defendant's claim of
    error. See United States v. Flores-Rivera, 
    787 F.3d 1
    , 27 n.20
    (1st Cir. 2015) (deeming claim unpreserved when appellant failed
    to join codefendant's objection); United States v. Acosta-Colón,
    
    741 F.3d 179
    , 189 (1st Cir. 2013) (rejecting argument that
    codefendants may "piggyback" on each other's objections).
    - 32 -
    citation     to    any       relevant     authority,       that    the    prosecutor's
    repetition    of       the    information     by   some    thaumaturgical         alchemy
    transformed a proper statement into an improper one.
    B
    The        district     court's     description        of    Dávila     as     a
    "cooperator       of    the    United     States    of     America"      was   likewise
    permissible.        This comment did no more than reiterate a fact
    already disclosed to the jury when Dávila testified.                       And nothing
    about the court's comment impermissibly placed the prestige of the
    United States behind the witness's forthcoming testimony.                                See
    United States v. Sutherland, 
    929 F.2d 765
    , 776 (1st Cir. 1991).
    Here, moreover, the appellant's attack on the comment is
    an excellent example of the aphorism that no good deed goes
    unpunished.        After       all,   the   court    made    the    statement       while
    cautioning the jury not to either believe or disbelieve Dávila's
    testimony based simply on her status as a cooperating witness.
    The court went on to explain, in pertinent part, that "cooperators
    can   be   truthful,         but   they   can   also      invent   stories     to    help
    themselves."           The propriety of this even-handed statement is
    apparent, and we discern no basis for a claim of error, much less
    plain error.       See United States v. Mercado Irizarry, 
    404 F.3d 497
    ,
    502 (1st Cir. 2005); United States v. Dailey, 
    759 F.2d 192
    , 200
    (1st Cir. 1985).
    - 33 -
    VIII
    We turn now to the appellant's claims of instructional
    error.     There are two such claims, and we treat them separately.
    A
    At trial, the appellant opted to testify.          He asserts
    that the district court erred by instructing the jury to consider
    his testimony "in the same manner" as that of "any witness with an
    interest in the outcome of the case."        In the appellant's view,
    this     instruction   unfairly     tarnished     his     credibility   by
    spotlighting his potential motive to deceive.
    Because    the      appellant   did     not     interpose    a
    contemporaneous objection to this instruction, our review is for
    plain error.     See United States v. Paniagua-Ramos, 
    251 F.3d 242
    ,
    246 (1st Cir. 2001).         The plain error hurdle, invariably high,
    "nowhere looms larger than in the context of alleged instructional
    errors."     Id.; see United States v. McGill, 
    952 F.2d 16
    , 17 (1st
    Cir. 1991).
    "[Appellate review] of jury instructions focuses on
    'whether they adequately explained the law or whether they tended
    to confuse or mislead the jury on the controlling issues.'" United
    States v. González-Vélez, 
    466 F.3d 27
    , 35 (1st Cir. 2006) (quoting
    Federico v. Order of Saint Benedict, 
    64 F.3d 1
    , 4 (1st Cir. 1995)).
    That review is context-dependent and must take into account the
    jury instructions as a whole.      See United States v. Troy, 618 F.3d
    - 34 -
    27,    33   (1st   Cir.   2010).     Examined     through   this   prism,   the
    challenged instruction easily passes muster.
    In rejecting this claim of error, we do not write on a
    pristine page: we defused a virtually identical argument in United
    States v. Gonsalves, 
    435 F.3d 64
     (1st Cir. 2006).                   There, we
    elaborated upon the distinction between a permissible instruction
    that   merely      "call[s]   attention    to   the   testifying   defendant's
    interest in the [case] outcome," 
    id. at 72
    , and an impermissible
    instruction that unfairly belabors the defendant's interest in the
    outcome, see 
    id.
           We made pellucid, however, that a garden-variety
    jury instruction that focused on the interests of a testifying
    defendant was appropriate and that only "egregiously phrased"
    instructions regarding a testifying defendant's credibility were
    to be avoided.         
    Id.
         The instruction challenged here is not
    egregiously        phrased    but,   rather,     is   modestly     worded   and
    appropriate in tone.          Indeed, it closely tracks the instruction
    that we approved in Gonsalves, including the district court's
    important caution that the jury should not "disregard or disbelieve
    [Padilla-Galarza's] testimony simply because he is charged in the
    case."      Plain error is plainly absent.
    B
    The appellant's second claim of instructional error is
    more troubling.       As an outgrowth of his Bruton argument, see supra
    Part III, the appellant posits that the district court committed
    - 35 -
    an error of omission by failing to provide the jury with a needed
    limiting instruction.         Specifically, he submits that the court
    should have advised the jury that the evidence of Hernández's out-
    of-court statements could not be used against the declarant's
    codefendant (namely, the appellant).              Because no such limiting
    instruction was requested below, our review is once again for plain
    error.   See Paniagua-Ramos, 
    251 F.3d at 246
    .
    The first two elements of plain error are satisfied here.
    "[C]ase law unambiguously requires the trial court to instruct the
    jury that an out-of-court confession," when admitted under Bruton,
    "may   not   be    considered   as     evidence   against   the   declarant's
    codefendants."        Vega Molina, 
    407 F.3d at 522
    ; see Richardson, 481
    U.S. at 211 ("[T]he Confrontation Clause is not violated by the
    admission    of   a    nontestifying    codefendant's   confession    with   a
    proper limiting instruction . . . .").            Here, the government has
    confessed error:        in its brief, "[t]he government recognizes that
    under [Vega] Molina, 
    407 F.3d at 521
    , the instruction should have
    been given."      Gov't Br. at 80.     Thus, we can safely assume, without
    further inquiry, that the district court's failure to supply the
    requisite limiting instruction constituted a clear and obvious
    error.   See United States v. Rodríguez-Durán, 
    507 F.3d 749
    , 770
    (1st Cir. 2007); Vega Molina, 
    407 F.3d at 521
    .
    This brings us to the third element of plain error
    review, which demands an inquiry into whether the error "affected
    - 36 -
    [the appellant's] substantial rights."                     Duarte, 
    246 F.3d at 61
    .
    To satisfy this element, the appellant must provide an affirmative
    answer     to    the    inquiry    with      "some      level     of   certainty    and
    particularity."        United States v. Bramley, 
    847 F.3d 1
    , 7 (1st Cir.
    2017).    We conclude that the appellant has failed to shoulder this
    burden.
    To       establish    that    an    error      affected    a   defendant's
    substantial rights, the defendant must show a fair probability
    that, but for the error, the trial would have produced a different
    outcome.        See United States v. Takesian, 
    945 F.3d 553
    , 566 (1st
    Cir. 2019).          In other words, "a defendant must show . . . 'a
    reasonable probability' that the flawed instruction led to a flawed
    conviction."         
    Id.
     (quoting United States v. Marcus, 
    560 U.S. 258
    ,
    262 (2010)).
    In this instance, the record reflects, with conspicuous
    clarity, that the government's evidence against the appellant was
    powerful.        This evidence included testimony by two cooperating
    witnesses (members of the gang) that the appellant played a central
    role in planning and orchestrating the plot; the fruits of the
    search of the appellant's home; receipts and surveillance footage
    that firmly linked the appellant to items used in the Banco Popular
    robbery; cell phone tower data that documented the appellant's
    proximity       to   the   bank   at   the     time   of    the   offense;    and   the
    appellant's admission that he was the recent owner of the getaway
    - 37 -
    vehicle.      Given this overwhelming evidence of the appellant's
    guilt, there is no reason to think that any impermissible inference
    that   the   jury    might   have    drawn     from   the    testifying    agent's
    description     of    Hernández's      confession       would     have    been   a
    determinative factor in the jury's decisional calculus.                  See Jones
    v. United States, 
    527 U.S. 373
    , 394-95 (1999) ("Where the effect
    of an alleged error is so uncertain, a defendant cannot meet his
    burden of showing that the error actually affected his substantial
    rights."); Vega Molina, 
    407 F.3d at 521
                         (holding absence of
    limiting Bruton instruction harmless when considered alongside
    "mass of other evidence").          Put another way, the appellant's claim
    of error fails because he has not shown that the omission of the
    limiting instruction affected his substantial rights.                     Thus, he
    has failed to satisfy the third element of plain error review.
    IX
    We can make short shrift of the appellant's claim of
    cumulative trial error.        Under the cumulative error doctrine, "a
    column of errors may [] have a logarithmic effect, producing a
    total impact greater than the arithmetic sum of its constituent
    parts."      Sepulveda, 
    15 F.3d at 1196
    .              In such rare instances,
    justice requires the vacation of a defendant's conviction even
    though the same compendium of errors, considered one by one, would
    not justify such relief.        See United States v. Sampson, 
    486 F.3d 13
    , 51 (1st Cir. 2007).
    - 38 -
    Cumulative error claims are necessarily sui generis, and
    such claims are typically raised — as here — for the first time on
    appeal.    Sepulveda, 
    15 F.3d at 1196
    .         Consideration of such claims
    must proceed with an awareness that "the Constitution entitles a
    criminal defendant to a fair trial, not a perfect one."                Delaware
    v. Van Arsdall, 
    475 U.S. 673
    , 681 (1986).               Factors to be weighed
    in assessing the force of a claim of cumulative error include "the
    nature     and      number      of      the    errors     committed;     their
    interrelationship, if any, and combined effect; how the district
    court dealt with the errors as they arose . . . ; and the strength
    of the government's case."           Sepulveda, 
    15 F.3d at 1196
    ; see United
    States v. Villarman-Oviedo, 
    325 F.3d 1
    , 18 (1st Cir. 2003).
    Here,    the     claim    of   cumulative    error   is   fanciful.
    Cumulative error is by its very nature a derivative claim, that
    is, it is dependent upon the existence of error simpliciter.                See
    Williams v. Drake, 
    146 F.3d 44
    , 49 (1st Cir. 1998).                       Error
    simpliciter is, in turn, a necessary — but not a sufficient —
    predicate for a valid claim of cumulative error. See, e.g., United
    States v. Rodriguez, 
    735 F.3d 1
    , 14 n.6 (1st Cir. 2013).              In short,
    not every finding of error equates to a finding of cumulative
    error.    See United States v. Rosario-Pérez, 
    957 F.3d 277
    , 302 (1st
    Cir. 2020).
    In this case, the cumulative error doctrine simply does
    not fit.    The myriad trial errors claimed by the appellant have
    - 39 -
    winnowed down to a single claim — the district court's failure to
    give   a   limiting    instruction        with    respect     to    Hernández's
    statements, see supra Part VIII — and that claim has been adjudged
    insufficient,     on its own,      to warrant      vacation of the jury's
    verdict.     A fortiori, there is no legally sufficient basis for a
    finding of cumulative error.       See United States v. DeMasi, 
    40 F.3d 1306
    , 1322 (1st Cir. 1994).
    X
    Having completed our tour of the appellant's claims of
    trial error, we arrive at his four claims of sentencing error.
    Three of these claims pertain to the sentencing process and the
    fourth challenges the substantive reasonableness of the aggregate
    228-month term of immurement.
    The     standard   of    review       for    preserved   claims   of
    sentencing error is abuse of discretion.                  See Gall v. United
    States, 
    552 U.S. 38
    , 56 (2007); United States v. Fields, 
    858 F.3d 24
    , 28 (1st Cir. 2017).       We approach such claims through a two-
    step pavane.      See United States v. Martin, 
    520 F.3d 87
    , 92 (1st
    Cir. 2008).       "First, we address those claims that affect the
    procedural integrity of the sentence.                  Second, we address any
    residual question as to the substantive reasonableness of the
    sentence."       Fields, 858 F.3d at 28 (quoting United States v.
    Rodríguez-Adorno, 
    852 F.3d 168
    , 175 (1st Cir. 2017)).
    - 40 -
    The        starting     point       for    most   federal     sentencing
    determinations is the calculation of the Guidelines Sentencing
    Range (GSR).          See Gall, 
    552 U.S. at 40
    ; United States v. Dávila-
    González,       
    595 F.3d 42
    ,   47   (1st    Cir.    2010).    The    sentencing
    guidelines, though, are advisory, and a sentencing court retains
    substantial discretion to vary up or down from the GSR based on
    the idiosyncratic circumstances of each offense and each offender.
    See United States v. Flores-Machicote, 
    706 F.3d 16
    , 20-21 (1st
    Cir. 2013); United States v. Ocasio, 
    914 F.2d 330
    , 336 (1st Cir.
    1990).
    Before us, the appellant does not dispute the district
    court's GSR calculations.                When making those calculations, the
    court grouped the first four counts of conviction and set the GSR
    for each count at 87 to 108 months.                     Any sentence on count 1,
    however, was constrained by a 60-month statutory maximum.                       See 
    18 U.S.C. § 371
    .          The court proceeded to impose a 60-month sentence
    on that count and top-of-the-range sentences of 108 months on
    counts 2, 3, and 4. All of these sentences were to run concurrently
    with each other.
    The court treated count 5 independently.                     By statute,
    the court was required to sentence the appellant to at least 84
    months     in    prison       and   to   run     the    sentence   on    that   count
    consecutively to the sentences on the other counts of conviction.
    See   
    18 U.S.C. § 924
    (c)(1)(A)(ii),           (D)(ii).     Moreover,     the
    - 41 -
    sentencing guidelines adopt the statutory mandatory minimum as the
    GSR for the count 5 offense.        See USSG §2K2.4(b).               The court varied
    upward and imposed a 120-month incarcerative sentence on this
    count,    running    that     sentence    consecutively          to    the   sentences
    imposed on the first four counts.
    These sentencing determinations, in gross, yielded an
    aggregate 228-month term of immurement.                    In turn, this term of
    immurement was to be served consecutive to the sentence imposed in
    Criminal Case No. 15-78.          See supra note 1.
    A
    The   appellant's    initial      claim       of   sentencing      error
    relates to the fact that he faced other charges in a separate
    proceeding, see supra note 1, apart from the charges that he faced
    in this case.       With respect to those other charges, he went to
    trial and was convicted — prior to his trial in this case — on two
    counts:       possession    of    ammunition     by    a    convicted        felon   and
    possession     of   marijuana     with   intent   to       distribute.          He   was
    sentenced to serve a term of 46 months on the possession-of-
    ammunition count, and he argues that the court below committed
    procedural error by directing that the sentences it imposed in
    this case run consecutive to that sentence.
    To put this claim of error into perspective, we must
    pause    to   explain   the    relevant      conduct    doctrine.            Under   the
    sentencing guidelines, disparate offenses may comprise "relevant
    - 42 -
    conduct" when they arise, say, out of a common scheme, plan, or
    course of activity.   USSG §1B1.3 cmt. n.5.   As relevant here, the
    key is whether the acts are "sufficiently connected or related to
    one another as to warrant the conclusion that they are part of a
    single episode, spree, or ongoing series of offenses."    Id.   The
    guidelines provide that a defendant who receives a sentence while
    serving (or awaiting the start of) a previously imposed sentence
    for relevant conduct is entitled to certain benefits, one of which
    is having both sentences run concurrently.    See id. §5G1.3(b)(2).
    The appellant asserts that his possession-of-ammunition conviction
    derives from the same "spree" as the offenses of conviction in
    this case and, thus, warranted concurrent sentencing.   In support,
    he notes that the ammunition was seized during the bank-robbery
    investigation; that evidence regarding what was discovered in that
    search was adduced at trial in this case; that an FBI agent
    testified below that the seized ammunition was "relevant to the
    bank   robbery   investigation";    and   that   the    presentence
    investigation report (PSI Report) in this case referred to the
    other case as a "related case."    Summing up, he says that he was
    entitled to — but did not receive — the "relevant conduct" benefits
    at sentencing.
    Although the sentencing court did not treat the earlier
    conviction as one for relevant conduct, the appellant's assignment
    of error does not get very far.    The record makes manifest that
    - 43 -
    the appellant waived     any relevant conduct argument.         At    the
    disposition hearing, the appellant's new counsel (a successor to
    his trial counsel but not his appellate counsel) offered only three
    arguments.     None of these three arguments bore any relation to
    relevant conduct.     Nor was this a mere fortuity:        the attorney
    advised the court that, under ordinary circumstances, he would
    have contended that the other case "satisfies fully [as] relevant
    conduct."     But he made it crystal clear that — at his client's
    direction — he was not advancing any such argument.          Indeed, he
    went so far as to withdraw his original reference to relevant
    conduct, stating that he wanted to "take that away."
    On this record, it plainly appears that the appellant
    knowingly relinquished any right to press a relevant conduct
    argument.    For present purposes, that equates to a waiver.         See,
    e.g., Coleman, 884 F.3d at 71-72 (deeming relevant conduct claim
    waived after defendant acknowledged potential claim at sentencing
    but did not pursue it); Rodriguez, 
    311 F.3d at 437
     (explaining
    that   identification   and   withdrawal   of   argument    constitutes
    waiver).     Consequently, the appellant's claim of error is by the
    boards.
    B
    The appellant's second claim of sentencing error centers
    on the Supreme Court's decision in Dean v. United States, 
    137 S. Ct. 1170
     (2017).     In Dean, the Court mulled whether a sentencing
    - 44 -
    court, when sentencing on counts that were not subject to a
    mandatory    minimum,      could   take     into      consideration     that   the
    defendant already faced a mandatory minimum sentence on another
    count.     See id. at 1174.        There, the defendant was statutorily
    required    to     serve   sentences      for   his     two   firearm    offenses
    consecutive to any sentences imposed for the other charged counts.
    See id. at 1177.     He asked the sentencing court to impose miniscule
    sentences on the remaining counts because he faced mandatory
    sentences totaling thirty years for the firearms offenses.                     See
    id.   at   1175.     The   sentencing      court   declined,     accepting     the
    government's argument that it could not weigh the mandatory minimum
    firearms sentences in its sentencing calculus on the other counts.
    See id.
    The Supreme Court took a different view.              It held that,
    in the absence of explicit statutory language to the contrary, a
    sentencing court had discretion to consider the incidence of a
    mandatory minimum sentence when formulating a sentence for another
    charge in the same case.       See id. at 1176.
    Invoking Dean, the appellant complains that the court
    below erred in refusing his entreaties for a shorter sentence
    despite the fact that he faced a mandatory minimum sentence for
    his firearms conviction.       See 
    18 U.S.C. § 924
    (c).          He argues that,
    under Dean, his sentences on the remaining counts of conviction
    should have been reduced.
    - 45 -
    In support of this argument, the appellant first attacks
    the district court's factual findings. He maintains that the court
    mistakenly   believed   that    the    appellant    had    a   second   robbery
    conviction and relied on that mistake to justify sentences at the
    top of the applicable GSRs.          The record tells a different tale.
    Although the court did inquire at one point whether the appellant
    had a prior robbery conviction, it received a clarifying negative
    response and — for aught that appears — that was the end of the
    matter.   Given the lack of record support, we conclude that the
    appellant's attack is woven entirely out of flimsy strands of
    speculation and surmise.       Therefore, we reject it.
    Alternatively,       the      appellant    suggests      that     the
    sentencing court improperly presumed that he would be found guilty
    in yet a third (impending) trial involving unrelated robbery and
    firearms charges:   Criminal Case No. 15-633.             This suggestion is
    empty. The court below acknowledged the appellant's upcoming trial
    in that case, referenced the presumption of innocence, and stated
    unequivocally that it "was not going [to] touch [the unadjudicated
    case] with a ten-foot pole."          Nothing in the record provides the
    slightest indication that the court altered its resolve when
    fashioning the appellant's sentence.
    Relatedly, the appellant says that the sentencing court
    misunderstood the law in deciding not to rely on the Dean rationale
    to shrink his sentences on counts 1 through 4.            This claim of error
    - 46 -
    reads      Dean   through    rose-colored       glasses.        The     Dean   Court
    established that a sentencing court "may consider" a related
    mandatory minimum in its ultimate sentencing determination on
    another count, Dean, 137 S. Ct. at 1177; see United States v.
    Matos-de-Jesús, 
    856 F.3d 174
    , 178 (1st Cir. 2017), but it did not
    require a sentencing court to discount every such sentence.                      The
    court below properly understood that it had discretion either to
    discount or not to discount its sentencing calculus pertaining to
    counts 1 through 4 on Dean grounds.             See Dean, 137 S. Ct. at 1176-
    77; United States v. Blewitt, 
    920 F.3d 118
    , 122 (1st Cir. 2019).
    We find no abuse of discretion in the court's reasoned decision to
    decline the appellant's invitation to impose lower sentences on
    Dean grounds.9
    C
    The appellant's third claim of sentencing error relates
    to   his    unsuccessful     proffer      of   evidence    of     his    "excellent
    institutional       behavior."       This      proffer    originated      with   the
    appellant's       request,   prior   to   sentencing,      that    the    probation
    office memorialize in the PSI Report certain comments by a mental
    9The sentencing court confronted this issue head-on and gave
    ample reasons for not employing the Dean rationale to reduce the
    appellant's sentences on counts 1 through 4. For instance, the
    court cited the appellant's "serious criminal record," his role as
    a "leader" of the gang, and the "emotional trauma and distress
    [that the robbery caused] bank employees and customers, including
    a pregnant lady."
    - 47 -
    health evaluator who had assessed the appellant's competency to
    stand trial in connection with Criminal Case 15-78.                  See supra
    note 1.     The evaluator had reported that Bureau of Prisons (BOP)
    personnel had described the appellant as "very polite," "a pleasure
    to work around," and an "ideal" inmate whose interactions with
    others emphasized "respect."            The probation office amended the PSI
    Report to include those statements.
    At    the     disposition     hearing,     the   sentencing    court
    rejected the evaluator's report as hearsay when defense counsel
    attempted to highlight it.          The appellant assigns error, arguing
    that the court based this rebuff on the erroneous legal conclusion
    that   it   was   prohibited      from    considering   hearsay   evidence    at
    sentencing.
    We    agree    with   the    appellant's    premise   that    hearsay
    evidence may sometimes be considered at sentencing.                 See United
    States v. Tardiff, 
    969 F.2d 1283
    , 1287 (1st Cir. 1992).                       We
    disagree, however, with the appellant's conclusion that the court
    below treated the hearsay nature of the proffer as a categorical
    bar.   Hearsay evidence is admissible at sentencing only if and to
    the extent that the sentencing court concludes that it bears
    sufficient indicia of reliability. See United States v. Rodriguez,
    
    336 F.3d 67
    , 71 (1st Cir. 2003) (stating that a sentencing court
    has "broad discretion" to consider hearsay evidence as long as it
    has "sufficient indicia of trustworthiness"); Tardiff, 969 F.2d at
    - 48 -
    1287 (similar).    In this instance, the record reflects that the
    court was familiar with this principle; that it was aware that it
    had discretion either to admit or exclude the proffered hearsay
    evidence; that it examined the evidence and found it insufficiently
    reliable; and that it decided not to exercise its discretion in
    favor of admitting this particular hearsay evidence.                    Such a
    decision was well within the encincture of the court's discretion.
    See United States v. Cunningham, 
    201 F.3d 20
    , 26 (1st Cir. 2000).
    We need not tarry.     At sentencing, the Federal Rules of
    Evidence do not apply.      See Rodriguez, 
    336 F.3d at 71
    .         Instead,
    "the court has considerable leeway in deciding whether particular
    evidence is reliable enough for sentencing purposes."                   United
    States v. Mills, 
    710 F.3d 5
    , 16 (1st Cir. 2013). Such a reliability
    assessment must be undertaken on a flexible, case-specific basis,
    informed both by considerations of fairness and by the sentencing
    court's accumulated experience.         See United States v. Brewster,
    
    127 F.3d 22
    , 28 (1st Cir. 1997); United States v. Gonzalez-Vazquez,
    
    34 F.3d 19
    , 25 (1st Cir. 1994).
    In this case, the district court did not elaborate upon
    its reasons for concluding that the proffered evidence was not
    sufficiently reliable.     Yet, the absence of specific findings is
    not fatal where, as here,         the justification       for the court's
    ultimate conclusion can easily be gleaned from the record.                 See
    United   States   v.   Berry,   
    258 F.3d 971
    ,   976   (9th   Cir.    2001)
    - 49 -
    (declining to require "express factual findings regarding the
    reliability of . . . hearsay statements" at sentencing); United
    States v. Gordon, 
    231 F.3d 750
    , 761 (11th Cir. 2000) (concluding
    that such findings are not obligatory "where the reliability of
    the statements is apparent from the record").
    The district court's justification is evident from the
    record, which reflects good reasons for the court to have refused
    to admit second-hand reports about the appellant's behavior.                    The
    court's   statement      that    it   "need[ed]"    direct      evidence   of   BOP
    employees'    assessment        of    the   appellant's       behavior   can    most
    naturally    be   read   as     skepticism      about   the    reliability     of   a
    particular piece of double-hearsay evidence, not as a categorical
    rejection of any and all hearsay evidence.                Here, moreover, the
    court had case-specific reasons for this skepticism, given both
    the second-hand provenance of the proffer and the fact that the
    appellant's trial had been plagued by his out-of-control antics
    (which included "flushing the toilet every time [the judge] spoke,
    putting his hands in his ears, and trying to interrupt [the judge]
    with 'la la la la la la'").            The evaluator's report was the sole
    source of evidence concerning the alleged praise of the appellant
    by BOP personnel; the appellant offered no testimony, statements,
    or other evidence from the BOP staffers themselves.                  In declining
    to rely upon the proffered second-hand report, the district court
    took the entirely sensible position that it would need to hear
    - 50 -
    from     the    BOP     personnel    directly     in    order     to     credit   the
    commendations.
    This disposes of the third of the appellant's sentencing
    challenges.       As we have said, a sentencing "court must take pains
    to     base    sentencing        judgments    upon     reliable        and   accurate
    information."         United States v. Tavano, 
    12 F.3d 301
    , 305 (1st Cir.
    1993).    So it was here.
    D
    The appellant's final shot across the sentencing bow
    implicates       the     substantive    reasonableness      of     his       aggregate
    sentence.       The concept of a substantively reasonable sentence is
    a protean one:         "[t]here is no one reasonable sentence in any given
    case but, rather, a universe of reasonable sentencing outcomes."
    United States v. Clogston, 
    662 F.3d 588
    , 592 (1st Cir. 2011).                      The
    twin    hallmarks       of   a   substantively    reasonable      sentence      are   a
    "'plausible sentencing rationale' and a 'defensible result.'"
    United States v. Miranda-Díaz, 
    942 F.3d 33
    , 42 (1st Cir. 2019)
    (quoting Martin, 
    520 F.3d at 96
    ).
    The     appellant    laments     that   a   228-month         aggregate
    custodial sentence is unreasonable because it is the "equivalen[t]
    of a life sentence" for an older man whose crimes did not result
    in serious physical injury.             He adds that the sentencing court
    overstepped by sentencing him at the top of the applicable GSRs
    - 51 -
    for counts 2 through 4 and imposing a 36-month upward variance for
    count 5.
    We     review    the   appellant's         plaint   for    abuse     of
    discretion, bearing in mind "the totality of the circumstances."
    United States v. Perretta, 
    804 F.3d 53
    , 57 (1st Cir. 2015).                    This
    is a deferential standard, and "it is not a basis for reversal
    that we, if sitting as a court of first instance, would have
    sentenced the defendant differently."               United States v. Madera-
    Ortiz, 
    637 F.3d 26
    , 30 (1st Cir. 2011) (quoting Martin, 
    520 F.3d at 92
    ).      Though we do not presume that a sentence within the
    advisory range is per se defensible, see id. at 30, "a defendant
    who attempts to brand a within-the-range sentence as unreasonable
    must carry a heavy burden," United States v. Pelletier, 
    469 F.3d 194
    , 204 (1st Cir. 2006).
    Here, the concurrent sentences on counts 1 through 4 all
    fall   within     the   applicable     GSR.      The   district    court     stated
    explicitly       that   it   reached    these     determinations      only    after
    considering the factors limned in 
    18 U.S.C. § 3553
    (a), and we must
    take that statement at face value.              See Dávila-González, 595 F.3d
    at 49; United States v. Rivera-Berríos, 
    902 F.3d 20
    , 27 (1st Cir.
    2018).     The court deemed sentences at the high end of the range
    appropriate (subject, of course, to the statutory maximum that
    applied to count 1) in view of the appellant's serious criminal
    history, his status as a former police officer, his prominent
    - 52 -
    leadership    role    in   organizing     the    criminal    enterprise,   the
    deleterious    impact      of   the   offenses    on   the   individual    and
    institutional victims, the firepower mustered by the gang, and the
    need to safeguard the public from likely recidivism.             Although the
    appellant may disagree with the relative weight that the court
    assigned to these factors as opposed to the weight that it assigned
    to potentially mitigating factors, disagreement over the court's
    "choice of emphasis" is not enough to undermine an otherwise
    plausible sentencing rationale.          United States v. Ledée, 
    772 F.3d 21
    , 41 (1st Cir. 2014) (quoting United States v. Ramos, 
    763 F.3d 45
    , 58 (1st Cir. 2014)).
    Largely the same compendium of factors informed the
    court's decision to vary upward with respect to the firearms
    conviction.    To be sure, a sentence that varies upward from the
    guideline range requires more explanation than a sentence within
    the range.    See Rita v. United States, 
    551 U.S. 338
    , 357 (2007);
    United States v. Gonzalez-Flores, __ F.3d __, __ (1st Cir. 2021)
    [No. 18-1607, 19-1118, slip op. at 2].           Here, however, the court's
    reasoning was adequate to satisfy this heightened standard.                Cf.
    United States v. Vargas-Dávila, 
    649 F.3d 129
    , 131 (1st Cir. 2011)
    ("[A]n increased sentence is necessarily a judgment call and,
    within wide limits, deference is due to the trier's on-the-spot
    perceptions.").      After all, the armed robbery of the bank involved
    the brandishing of three firearms and easily could have resulted
    - 53 -
    in bystander injuries.    The plot also involved the planting of
    fake bombs — a cruelly cynical method of distraction.    Given the
    totality of the circumstances, the district court's rationale for
    its modest upward variance on count 5 was within the realm of
    plausibility.   See id. at 132.
    So, too, the aggregate sentencing outcome fell within
    the wide universe of reasonable sentencing outcomes.    On balance,
    the period of incarceration, though lengthy, is proportionate to
    the serious nature of the crimes committed and the characteristics
    displayed by the offender, especially since the appellant was the
    apparent mastermind of the criminal scheme.   The appellant's age
    — he was 52 years old at the time of sentencing — is not a
    significantly countervailing factor.   See Pelletier, 
    469 F.3d at 204
     (rejecting 55-year-old defendant's age-based challenge to 151-
    month sentence); see also United States v. Pacheco-Martinez, 
    791 F.3d 171
    , 180 (1st Cir. 2015) ("[A]ge could cut both ways in the
    sentencing calculus. . . . [P]ersons convicted of a crime late in
    life may be unlikely to recidivate . . . [b]ut it is also true
    that 'engaging in criminal activity at such an age provides
    evidence that [the defendant] may be one of the few oldsters who
    will continue to engage in criminal activity until [he] drop[s].'"
    (sixth, seventh, and eighth alterations in original) (quoting
    United States v. Johnson, 
    685 F.3d 660
    , 662 (7th Cir. 2012))).
    - 54 -
    The short of it is that the district court offered a
    plausible rationale for the aggregate sentence and that sentence
    achieved a defensible result. The appellant's claim of substantive
    unreasonableness is therefore meritless.
    XI
    The sentencing court directed the appellant (along with
    the others convicted of the bank robbery charge, jointly and
    severally) to pay $64,000 in restitution to Banco Popular.               The
    appellant contests this restitution order.
    The restitution order was issued in pursuance of the
    Mandatory    Victims   Restitution   Act    (MVRA),    which    authorizes   a
    sentencing court to order a defendant to make restitution when an
    identifiable victim suffers a pecuniary loss as a result of a
    defendant's    criminal   conduct.        See   18   U.S.C.    § 3663A(a)(1),
    (c)(1)(B).     Importantly, the MVRA only reaches monetary losses
    that a victim has actually sustained.           See United States v. Flete-
    Garcia, 
    925 F.3d 17
    , 37 (1st Cir. 2019).                The thrust of the
    appellant's assignment of error is that the court ordered him to
    pay more than the victim of the robbery (Banco Popular) actually
    lost.
    "We review restitution orders for abuse of discretion,
    examining the court's subsidiary factual findings for clear error
    and its answers to abstract legal questions de novo."                  United
    States v. Chiaradio, 
    684 F.3d 265
    , 283 (1st Cir. 2012); see Flete-
    - 55 -
    Garcia, 925 F.3d at 37.       The threshold that must be crossed in
    order to validate a restitution order is familiar:        the government
    must carry the burden of demonstrating a proximate, but-for causal
    nexus between the offense of conviction and the actual loss for
    which restitution is ordered.        See United States v. Alphas, 
    785 F.3d 775
    , 786 (1st Cir. 2015); United States v. Cutter, 
    313 F.3d 1
    , 7 (1st Cir. 2002).         This standard is relatively modest in
    application, as "a modicum of reliable evidence" may suffice both
    to establish the requisite causal connection and to justify a
    dollar amount. Flete-Garcia, 925 F.3d at 37 (quoting United States
    v. Vaknin, 
    112 F.3d 579
    , 587 (1st Cir. 1997)); see United States
    v.   Salas-Fernández,   
    620 F.3d 45
    ,   48   (1st   Cir.   2010)   ("[A]
    restitutionary amount must have a rational basis in the record.").
    Seen in this light, the appellant's assignment of error
    is all meringue and no pie.           It is uncontradicted that the
    appellant's coconspirators left Banco Popular with slightly more
    than $64,000 in purloined funds ($64,633.13, according to the
    testimony of a percipient witness).        Thus, the sentencing court
    had before it more than a modicum of evidence to support the
    factual premise of its restitution order.
    The appellant struggles to portray subsequent events as
    mitigating the loss and vitiating the force of the government's
    evidence. He observes that some money was recovered from the crime
    scene and the abandoned getaway car.        He also observes that the
    - 56 -
    bank was federally insured and, thus, eligible for reimbursement
    of any stolen funds from the Federal Deposit Insurance Corporation
    (FDIC).      The court below found these additional facts insufficient
    to warrant either the elimination of restitution or a reduction in
    the restitutionary amount.      So do we.
    To be sure, some bags of money were discarded as the
    robbers fled and anti-theft devices implanted in the bags did their
    work.       By like token, damaged bills were found in the abandoned
    getaway car.        But testimony in the record supported (and no
    testimony contradicted) a conclusion that the discarded money had
    been    functionally   destroyed   in   the   process.10   It   is   abject
    speculation, unsupported by the record, to insist that these
    damaged bills were somehow capable of rehabilitation and reuse.
    Indeed, it would defy common sense to think that something like a
    gentle rinse cycle would do the trick; a readily reversible anti-
    theft dye would serve little purpose.
    Nor is the appellant's conjecture that the bank may have
    recovered a few stray bills undamaged by the anti-theft devices
    sufficient to undermine the district court's findings.          Where, as
    here, the government has made a prima facie showing of a victim's
    actual loss through competent evidence, a defendant must do more
    FBI agents and Puerto Rico police officers described the
    10
    bills discovered near the bank building and inside the getaway car
    as "dye-stained" and "all [] tinted."
    - 57 -
    than speculate about the possibility of mitigation in order to
    obtain an offset.            See United States v. Dickerson, 
    909 F.3d 118
    ,
    129-30 (5th Cir. 2018); United States v. Steele, 
    897 F.3d 606
    , 613
    (4th Cir. 2018). He must, at a minimum, point to evidence adequate
    to support a finding of a proposed offset in a specific amount.
    See Flete-Garcia, 925 F.3d at 38; United States v. González-
    Calderón,          
    920 F.3d 83
    ,   86    (1st    Cir.   2019).     The    appellant
    identifies no such evidence in this record.
    The appellant's reliance on the putative availability of
    FDIC reimbursement is equally misplaced.                         Congress has made it
    nose-on-the-face plain that a court may not reduce the amount of
    restitution otherwise due under the MVRA because "a victim has
    received or is entitled to receive compensation with respect to a
    loss        from     insurance      or       any     other   source."         
    18 U.S.C. § 3664
    (f)(1)(B); see United States v. Gallant, 
    537 F.3d 1202
    , 1253
    (10th Cir. 2008).            It follows inexorably that the court below did
    not err in declining to offset either FDIC insurance proceeds or
    the    possible          future   recoupment         of   such   proceeds   against   the
    restitutionary amount.11
    For the sake of completeness, we note that the FDIC itself
    11
    may properly qualify as a victim eligible to receive restitution.
    See Vaknin, 
    112 F.3d at 591
    .     In such a situation, only the
    recipient of the restitution would change as the FDIC "would step
    into the victim['s] shoes as a subrogee of [its] restitution
    claims." United States v. Bright, 
    353 F.3d 1114
    , 1122 (9th Cir.
    2004).
    - 58 -
    To sum up, the appellant's grumbling about the district
    court's    factfinding       rings    hollow.      The   restitution    order    is
    adequately supported by the record, and we uphold it.
    XII
    In   a   final     jab,   the   appellant     lambastes    his    trial
    counsel's performance.          He contends, citing book and verse, that
    Carrillo    afforded     him    ineffective       assistance   of     counsel    in
    derogation of his Sixth Amendment rights.                See U.S. Const. amend.
    VI; see also Strickland v. Washington, 
    466 U.S. 668
    , 687-88 (1984).
    This claim of error is better left for another day.                  It
    was not made squarely in the district court, and "[w]e have held
    with a regularity bordering on the monotonous that fact-specific
    claims of ineffective assistance cannot make their debut on direct
    review of criminal convictions."              United States v. Mala, 
    7 F.3d 1058
    , 1063 (1st Cir. 1993); see United States v. Tkhilaishvili,
    
    926 F.3d 1
    , 20 (1st Cir. 2019); United States v. Santana-Dones,
    
    920 F.3d 70
    , 82 (1st Cir. 2019).                This prudential precept has a
    practical rationale:           ineffective assistance claims "typically
    require the resolution of factual issues that cannot efficaciously
    be addressed in the first instance by an appellate tribunal."
    Mala, 
    7 F.3d at 1063
    .        The trial court, by contrast, has a superior
    vantage from which to "assess both the quality of the legal
    representation afforded to the defendant in the district court and
    the impact of any shortfall in that representation."                    
    Id.
         The
    - 59 -
    upshot is that a defendant who wishes to press a newly minted
    ineffective assistance of counsel claim — like the appellant —
    ordinarily must raise it in a collateral proceeding brought in the
    district court under 
    28 U.S.C. § 2255
    .      See Santana-Dones, 920
    F.3d at 82; Jones, 778 F.3d at 389.
    We say "ordinarily" because there is an exception to the
    Mala rule.   United States v. Miller, 
    911 F.3d 638
    , 642 (1st Cir.
    2018); United States v. Natanel, 
    938 F.2d 302
    , 309 (1st Cir. 1991).
    Under this exception, an appellate court may proceed to determine
    the merits of an ineffective assistance claim in the first instance
    "where the critical facts are not genuinely in dispute and the
    record is sufficiently developed to allow reasoned consideration."
    Miller, 911 F.3d at 642 (quoting Natanel, 
    938 F.2d at 309
    ).    The
    exception, though, is narrow, and its applicability depends on the
    particular circumstances of a given case.   See 
    id.
    The case at hand does not fit within the cramped confines
    of the exception.   Although the appellant complained about his
    trial counsel several times in the proceedings below, the district
    court's responses were guarded.    Moreover, the record before us
    does not illuminate critical parts of the necessary inquiry.   For
    example, information about why counsel either took or did not take
    certain actions is scarce.   So, too, the district court has made
    no detailed appraisal of the lawyer's performance.     Given these
    significant gaps, the record is insufficiently developed to permit
    - 60 -
    an informed determination as to whether trial counsel provided an
    obviously     difficult    client      (the     appellant)        with     the
    constitutionally required level of effective assistance.                    See
    United   States   v.   Wyatt,   
    561 F.3d 49
    ,    52   (1st   Cir.    2009).
    Attempting to adjudicate the appellant's ineffective assistance of
    counsel claim without additional information would, therefore, be
    tantamount to "playing blindman's buff."            Mala, 
    7 F.3d at 1063
    .
    For   these   reasons,     we     dismiss      the   appellant's
    ineffective assistance of counsel claim, without prejudice to his
    right to pursue it in a proceeding for post-conviction relief under
    
    28 U.S.C. § 2255
    .
    XIII
    We need go no further. For the reasons elucidated above,
    we affirm the judgment of the district court; provided, however,
    that the appellant's ineffective assistance of counsel claim is
    dismissed without prejudice, leaving him free to pursue that claim,
    should he so desire, in a collateral proceeding brought pursuant
    to 
    28 U.S.C. § 2255
    .
    So Ordered.
    - 61 -