United States v. Garcia-Sierra ( 2021 )


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  •            United States Court of Appeals
    For the First Circuit
    No. 16-2503
    UNITED STATES OF AMERICA,
    Appellee,
    v.
    ADOLFO LEÓN GARCÍA-SIERRA,
    Defendant, Appellant.
    APPEAL FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF PUERTO RICO
    [Hon. Francisco A. Besosa, U.S. District Judge]
    Before
    Howard, Chief Judge,
    Kayatta, Circuit Judge,
    and Torresen, District Judge.*
    Linda A. Backiel for Appellant.
    Kaitlin E. Paulson, Attorney, Appellate Section,
    Criminal Division, U.S. Department of Justice, with whom John P.
    Cronan, Acting Assistant Attorney General, Rosa Emilia Rodríguez-
    Vélez, United States Attorney, and Mariana E. Bauza Almonte,
    Assistant United States Attorney, were on brief, for Appellee.
    April 7, 2021
    *   Of the District of Maine, sitting by designation.
    HOWARD,    Chief    Judge.       Adolfo       León    García-Sierra
    ("García") was convicted by a jury of conspiring to commit drug
    trafficking offenses and was sentenced to a term of imprisonment
    of 224 months and 8 days.          He appeals both from his convictions
    and from his sentence, arguing that the erroneous admission of
    certain evidence tainted the verdicts and that his sentence is
    unreasonable.     After determining that there was trial error but
    that it was harmless, we affirm the convictions.                We do, however,
    remand for resentencing.
    I. BACKGROUND
    The indictment alleged a drug importation operation
    involving the shipment of large amounts of cocaine from South
    America to Puerto Rico between August 2012 and June 2014.                 García
    was charged with conspiracy to possess with intent to distribute
    a   controlled   substance    in   violation   of   
    21 U.S.C. § 846
       and
    conspiracy to import narcotics into the United States in violation
    of 
    21 U.S.C. § 963
    .
    By way of background to García's legal challenges, we
    briefly sketch the central evidence presented during García's
    trial -- employing a "balanced-presentation" approach as we did in
    United States v. Rodríguez-Soler, 
    773 F.3d 289
    , 290 (1st Cir. 2014)
    -- as well as the sentence he received thereafter.                      We leave
    further elaboration of the facts to our discussion of each of
    García's claims.
    - 2 -
    A. The December 2012 Rescue at Sea
    The first witness at trial was Julio Ruiz, a member of
    the Coast Guard stationed in San Juan, Puerto Rico. Ruiz testified
    that in December 2012, he responded to a report made by a shipping
    vessel that had observed a small boat adrift about fifteen miles
    offshore with two persons aboard, calling for help.    Ruiz located
    the small boat and rescued its two occupants, one of whom was
    García.    Ruiz testified that this search-and-rescue stood out to
    him because the persons on board lacked documents, and the stories
    they told "seemed odd."    They had explained that they had been on
    a larger ship that had sunk very quickly and that they had escaped
    from the sinking vessel onto the small boat on which they were
    found.    This story seemed odd to Ruiz because the Coast Guard had
    received no report of a large ship in distress, because large ships
    do not sink quickly, and because when they do sink, they leave an
    oil sheen on the water, of which there was no trace.          After
    completing the rescue, the Coast Guard transferred the two persons
    to the Customs and Border Protection agency.
    B. Testimony by Agent De Jesús
    This curious story was followed by the testimony of FBI
    Agent Juan De Jesús.   De Jesús testified that around November 2012
    he had been investigating an organization which, according to an
    unnamed source, was in the business of smuggling cocaine from South
    America to Puerto Rico by sea.    In December of that year, De Jesús
    - 3 -
    "was advised that two persons matching the modus operandi of the
    organization had been rescued out at sea."     De Jesús eventually
    interviewed each of these two persons, one of whom was García.   De
    Jesús testified that during his interview with García, García
    explained to him that, prior to their rescue by the Coast Guard,
    he and his companion had been on a shipping vessel en route to the
    Dominican Republic for the purpose of transporting gasoil to
    Venezuela.
    De Jesús testified that García's shipwreck companion
    provided him with a similar but slightly different story: that he
    and García had been on a shipping vessel en route to the Dominican
    Republic for the purpose of transporting large amounts of cash.
    De Jesús proceeded to describe how García's companion eventually
    agreed to serve as an informant and began supplying De Jesús with
    ongoing updates about cocaine trafficking activity between South
    America and the Caribbean.   De Jesús testified how the informant's
    assistance ultimately enabled law enforcement to seize a large
    shipment of cocaine upon its arrival in Puerto Rico's Guayanilla
    Bay in October 2013.
    C. The October 2013 Seizure
    The testimony by Agent De Jesús was followed by testimony
    from seven different witnesses all concerning the details of the
    law enforcement operation that resulted in the seizure of the
    cocaine shipment in Guayanilla Bay in October 2013.   This evidence
    - 4 -
    is both voluminous and uncontested on appeal.      It suffices for our
    purposes to note that the government amply demonstrated that its
    agents seized over 200 kilograms of bundled cocaine after members
    of the surveilled organization had transferred the bundles from a
    ship to a small stash house on shore.
    D. The Informant's Account
    Next to testify was García's shipwreck companion turned
    government informant.     He testified that he began working as a
    boat captain for a cocaine trafficking organization in 2012.        He
    described the organization's basic trafficking method: using small
    boats to carry bundled cocaine bricks out to a larger cargo ship
    waiting some twenty miles offshore, and then doing the same in
    reverse once the larger ship approached the target destination.
    The   witness   described    several   specific   trafficking
    voyages in which he took part.        He identified García as having
    accompanied him on one trip in late 2012.        García's role was to
    inspect the cocaine upon arrival to ensure the cargo made it
    through the journey intact.    According to the witness's account,
    he and García used a small boat to transport the cocaine from the
    Venezuelan coast to a large cargo ship waiting offshore.          They
    sailed on the larger ship until they neared the Puerto Rican coast,
    at which time they offloaded the cocaine onto a small boat and set
    off in the small boat for shore.       Shortly thereafter, the small
    boat began to take on water.   The pair threw the cocaine overboard
    - 5 -
    and managed to stay afloat on the sinking vessel.        They eventually
    caught the attention of a fishing vessel, which reported their
    plight to the Coast Guard, leading to the duo's rescue.                  The
    witness testified that he was subsequently questioned by Agent De
    Jesús and eventually agreed to serve as an informant.
    Finally, the witness testified that García was involved
    with the shipment to Guayanilla Bay in October 2013.         According to
    the witness, although García did not accompany him on the actual
    voyage, García helped to organize and load the cocaine at the point
    of origin.   When the shipment arrived in Puerto Rico, the witness
    informed Agent De Jesús of its location, enabling its seizure by
    law enforcement.
    E. The May 2011 Seizure
    The final pieces of evidence presented by the government
    brought the jury back in time to a smuggling incident from May
    2011, before the start of the conspiracy for which García was on
    trial.   The government had moved in limine indicating its intent
    to introduce this evidence for the purpose of proving García's
    knowledge and intent.    The May 2011 activity was part of the basis
    of separate conspiracy charges against García which were pending
    resolution in other proceedings.     García argued that the evidence
    was   inadmissible.     The   district   court   did   not   rule   on   its
    admissibility in advance of trial but ultimately permitted the
    government to present the evidence to the jury.
    - 6 -
    The government employed three witnesses to do so.          Two
    officers testified about their dramatic interception of a large
    shipment of cocaine which had arrived in Puerto Rico in May 2011.
    The third witness, a government informant (different from the one
    who had been rescued with García in 2012),1 testified that in May
    2011 he and García were involved with a large shipment of cocaine
    to Puerto Rico.    This witness also authenticated a recording of a
    phone call that he described as a conversation between himself and
    García about the sale of six kilograms of cocaine.
    F. Conviction, Sentencing, Appeal
    The     jury   convicted   García,    and    a   Presentence
    Investigation Report (PSR) was prepared, recommending a sentence
    within the range of 235 to 293 months of imprisonment.               The
    district court imposed a sentence of approximately 224 months,
    reflecting a sentence at the lowest end of the recommended range
    with a reduction for the time that García had spent incarcerated
    in Colombia prior to his extradition to the United States.
    García    appealed,   challenging    the    introduction   of
    "overview" testimony from several of the government's witnesses,
    the admission of evidence regarding the cocaine seizure in May
    2011, and the reasonableness of his sentence.
    1 Hereafter, we refer to this witness as "the 2011 informant"
    when necessary to distinguish from the one who had been rescued
    with García in 2012.       References hereafter simply to "the
    informant" refer to García's shipwreck companion.
    - 7 -
    II. EVIDENTIARY CHALLENGES
    We tackle the evidentiary challenges first.   We conclude
    that the trial court erred in permitting the government to solicit
    "overview" testimony from Agent De Jesús and in allowing it to
    present evidence relating to the May 2011 cocaine seizure.    But we
    find both errors harmless and affirm García's convictions.
    A. Standard of Review
    Where an appellant objected to a district court's evidentiary
    ruling at trial, we review the district court's decision for abuse
    of discretion.    United States v. Watson, 
    695 F.3d 159
    , 162 (1st
    Cir. 2012).   If our review shows that the trial court acted outside
    the bounds of its discretion, then we vacate the conviction unless
    the error was harmless.    United States v. Brown, 
    669 F.3d 10
    , 24
    (1st Cir. 2012); Fed. R. Crim. P. 52(a).
    Where the appellant did not voice the same objection at trial,
    we review only for plain error.    Watson, 695 F.3d at 162.   If we
    find that the trial court plainly erred -- in other words, erred
    in a way which is "clear or obvious" -- then we vacate the
    conviction if the appellant persuades us both that the error
    "affected his substantial rights" and that the error "seriously
    affected the fairness, integrity, or public reputation of the
    judicial proceedings."    Id. at 163; see also Rosales-Mireles v.
    United States, 
    138 S. Ct. 1897
    , 1904-05 (2018).
    - 8 -
    B. Overview Testimony
    García argues that certain statements made by Agent De
    Jesús     early    in   the   trial    constituted   inadmissible    "overview"
    testimony.        See United States v. Meises, 
    645 F.3d 5
    , 13 (1st Cir.
    2011); United States v. Flores-De-Jesús, 
    569 F.3d 8
    , 17 (1st Cir.
    2009); United States v. Casas, 
    356 F.3d 104
    , 118-19 (1st Cir.
    2004).2    Because García failed to make this objection at trial, we
    review for plain error.            See United States v. Laureano-Pérez, 
    797 F.3d 45
    , 66-67 (1st Cir. 2015); United States v. Valdivia, 
    680 F.3d 33
    , 47 n.10 (1st Cir. 2012).
    Testimony        by   a   law   enforcement   agent    constitutes
    impermissible "overview" testimony when it effectively opines that
    a defendant is guilty "based on the totality of information
    gathered" in the agent's investigation, rather than relaying the
    agent's first-hand experiences and observations.             Meises, 
    645 F.3d at 15
     (quoting Flores-De-Jesús, 
    569 F.3d at 19
    ).               Such opinions
    are impermissible coming from a lay witness,3 whose "testimony in
    2  Following García's lead, we focus on the "overview"
    statements made by Agent De Jesús, but we acknowledge that García
    also argues that former officer Gerardo Torres Molino likewise
    provided impermissible overview testimony.        Because Torres's
    testimony related to the investigation underlying the Rule 404(b)
    evidence -- which we ultimately hold was admitted in error on other
    grounds (as discussed below) -- we do not discuss Torres's
    testimony here.
    3  Though not relevant here, such opinions are equally
    impermissible coming from an expert. See Meises, 
    645 F.3d at
    18
    n.20; Casas, 
    356 F.3d at 120
    .
    - 9 -
    the form of an opinion is limited to one that is . . . rationally
    based on the witness's perception."             Fed. R. Evid. 701(a); see
    also Meises, 
    645 F.3d at 15
    ; Valdivia, 
    680 F.3d at 47
     ("Because
    the witness is, in essence, testifying about the results of a
    criminal investigation before the government has presented any
    evidence -- often including aspects of the investigation in which
    he did not actually participate -- we have repeatedly admonished
    the use of such testimony.").
    Such overview testimony from a law enforcement officer
    remains    problematic        even    when    the    specific     information
    undergirding the officer's conclusory statements eventually comes
    into evidence.     See Flores-De-Jesús, 
    569 F.3d at 17
    .           The problem
    is two-fold.      First, such testimony "effectively usurp[s] the
    jury's role as fact-finder" by suggesting which inferences the
    jury   should   draw   from    the   evidence     appropriately   before   it.
    Meises, 
    645 F.3d at 16
    . "[H]aving [an agent] so testify amount[s]
    to simply dressing up argument as evidence."            
    Id. at 17
    .    Second,
    to the extent such testimony is a "preview of other witnesses'
    testimony," it functions as an endorsement by the government of
    the first-hand witness's account, thereby impermissibly bolstering
    that witness's credibility.          Id.; see also Casas, 
    356 F.3d at 120
    ("Overview      testimony     by     government     agents   is   especially
    problematic because juries may place greater weight on evidence
    perceived to have the imprimatur of the government."); Flores-De-
    - 10 -
    Jesús, 
    569 F.3d at 18
     ("The overview testimony of a law enforcement
    official is not simply a repetition (at best) of other evidence.
    It is also, in effect, an endorsement of the veracity of the
    testimony that will follow.").
    Of course, as long as a law enforcement agent's testimony
    is limited to what he has gleaned from his first-hand observations,
    there is nothing wrong with the agent "describ[ing] the course of
    his investigation in order to set the stage for the testimony to
    come."   Flores-De-Jesús, 
    569 F.3d at 19
    ; see also United States v.
    Rosado-Pérez, 
    605 F.3d 48
    , 56 (1st Cir. 2010) ("If a proper
    foundation is laid, government witnesses may testify about matters
    within their personal knowledge.").
    With   these   principles   in   place,   we   consider   the
    testimony which García challenges here.       García primarily points
    to various statements made by Agent De Jesús which mention the
    existence and methods of "a cocaine trafficking organization"
    without indicating any first-hand basis for the testimony.4           De
    4 Within his "overview" testimony argument, García includes
    objections to De Jesús's testimony regarding the informant's
    purported text messages with García. It remains unclear to us how
    this testimony arguably constitutes impermissible overview.     It
    consists of De Jesús authenticating screen shots he had taken of
    text messages the informant had shown him on his phone, testifying
    that the informant had told him that the messages were from a
    conversation with García, and then reading the messages out loud.
    Defense counsel preserved a hearsay objection to the testimony's
    admission, but García provides no developed argumentation on
    appeal that the testimony was hearsay or the messages improperly
    authenticated. Even if we were to assume that the district court
    - 11 -
    Jesús relayed details of several of this organization's smuggling
    ventures of which he had no personal knowledge.          Much of Agent De
    Jesús's testimony detailed information De Jesús knew only because
    his informant had told it to him.
    De Jesús further testified that he had been "advised
    that two persons matching the modus operandi of the organization
    had been rescued out at sea."       He proceeded to identify these two
    persons as his later informant and García, and identified the
    latter by name, by photograph, and by pointing to García in court.
    De   Jesús   testified   briefly    about    having   interviewed   García
    sometime after his rescue at sea.
    Aspects of this testimony raise some of the concerns
    that have troubled us with previous uses of overview witnesses.
    See, e.g., Casas, 
    356 F.3d at 118-19
    ; Flores-De-Jesús, 
    569 F.3d at 23-24, 26-27
    .    Agent De Jesús testified "well beyond his personal
    knowledge" when he discussed the existence, methods, and myriad
    ventures of the smuggling operation.        Casas, 
    356 F.3d at 118
    .   Much
    erred in overruling García's objection, we would find the error
    harmless.   The informant later testified about these same text
    messages and their connection to García.      Moreover, De Jesús's
    testimony about the texts was so garbled it could hardly be said
    to have helped the government's case: De Jesús mistakenly read the
    messages out of order, he did not indicate who was the author of
    each message, and numerous translation issues stilted the reading.
    And to his botched reading of the messages, De Jesús added nothing,
    for he neither analyzed nor interpreted them.
    - 12 -
    of his "testimony was unquestionably hearsay. It unnecessarily
    anticipated testimony that [the informant] would give himself. It
    had the imprimatur problems we have described."                 Flores-De-Jesús,
    
    569 F.3d at 23
    .       Most problematically, it identified García as a
    member of the smuggling organization with whom the informant was
    in communication.5       This was tantamount to "testif[ying] that . .
    . the defendant[] was guilty of the conspiracy charged."                   
    Id. at 24
     (quoting Casas, 
    356 F.3d at 119
    ).
    But De Jesús stopped short of giving his own conclusions
    about the role García played in the conspiracy, which we have
    previously considered especially problematic.                    See    Flores-De-
    Jesús, 
    569 F.3d at 24
     (considering "[t]he most troubling part of
    Agent Toro's testimony" to be "his conclusions about the roles of
    the defendants in the conspiracy"); Meises, 
    645 F.3d at 16, 18
    (holding inadmissible agent's testimony expressing "his opinions
    as to defendants' roles in the conspiracy" because "it was patently
    unfair   for   [Agent]    Cruz    to    present    his   view    of    appellants'
    culpability").       Thus, the problem here is limited to the concern
    that De Jesús's testimony may have been interpreted by the jury as
    "vouching"     for   another     witness's      subsequent   testimony.        Cf.
    5 During its direct examination of Agent De Jesús, the
    government asked whether "[the informant was] also communicating
    to other members of the organization," to which De Jesús responded
    "yes," and then stated that "he also had -- was communicating with
    Adolfo Léon García-Sierra."
    - 13 -
    Meises, 
    645 F.3d at 17-18
     (considering "the problem with Cruz's
    testimony [to] extend beyond vouching for what the jury may
    perceive as a less credible witness").
    Still, the problem remains that De Jesús, like the agent
    in Meises, "had no insight to offer the jurors based on personal
    knowledge of the [defendant's] inculpatory conduct.                          Like them, he
    had to rely on [an informant's] account."                        
    645 F.3d at 16
    .      But we
    proceed      on    plain   error      review,     and       we    cannot    say   that   the
    problematic        aspects     of     De   Jesús's      testimony          both   "affected
    [García's]         substantial        rights"     and       "seriously      affected     the
    fairness,         integrity,     or     public      reputation        of    the     judicial
    proceedings."         Watson, 695 F.3d at 163.
    The factual matter provided by De Jesús's testimony
    otherwise came into evidence.                   A member of the Coast Guard had
    already testified about rescuing García and the other man at sea,
    and    had    noted    that    the      story     they       told    to     explain    their
    circumstance had struck him as implausible.                          And the informant
    eventually testified extensively about his first-hand experiences
    with    the       smuggling      operation        generally,         and     with     García
    specifically.
    The    remaining        potential      prejudice       is     therefore    the
    effect of De Jesús's testimony on the jury's assessment of the
    informant's         credibility.           Without      a     doubt,       this   witness's
    testimony was indispensable to the government's case, and it is
    - 14 -
    impossible to divine the precise influence De Jesús's preview of
    the witness's account may have had on the jury's assessment of the
    witness's credibility.          But on plain error review García bears the
    burden of persuading us that the errors plaguing De Jesús's
    testimony harmed him, see United States v. Morris, 
    784 F.3d 870
    ,
    874 (1st Cir. 2015), and we are not persuaded that they did.                     The
    informant stood up impressively well to cross examination.                        No
    holes whatsoever were poked in his story.                    And that story was
    consistent     with     other    competent      evidence     proffered      by   the
    government:    most     importantly,       by   the   Coast    Guard       officer's
    testimony and by the testimony regarding the Guayanilla seizure.
    Consequently, García's challenge to the admittedly problematic
    overview testimony provided by Agent De Jesús falters on the shoals
    of plain error review. It provides no basis for relief.
    C. Rule 404(b) Evidence
    We turn next to García's second evidentiary challenge,
    which concerns the admission of prior-bad-acts evidence under
    Federal Rule of Evidence 404(b).            Before turning to the specifics
    of García's challenge, we overview the basic legal landscape.
    Rule 404(b) concerns the admissibility of evidence of
    "crimes, wrongs, or acts" other than those for which a defendant
    is on trial.      Rule 404(b)(1) states that "[e]vidence of any other
    crime,   wrong,    or   act     is   not   admissible   to    prove    a   person’s
    character in order to show that on a particular occasion the person
    - 15 -
    acted in accordance with the character."                     Thus, Rule 404(b)(1)
    prohibits a particular inference one might draw from such evidence:
    it "forbid[s] the prosecution from asking the jury to infer from
    the fact that the defendant has committed a bad act in the past,
    that he has a bad character and therefore is more likely to have
    committed the bad act now charged."             United States v. Moccia, 
    681 F.2d 61
    , 63 (1st Cir. 1982) (Breyer, J.).                       We refer to this
    inference as the forbidden "propensity inference."                     See, e.g.,
    United States v. Varoudakis, 
    233 F.3d 113
    , 122 (1st Cir. 2000).
    But   Rule   404(b)      does    not   render   inadmissible       prior-bad-acts
    evidence     for   any    other    purpose,     such    as    to   prove   "motive,
    opportunity,       intent,      preparation,    plan,    knowledge,        identity,
    absence of mistake, or lack of accident." Fed. R. Evid. 404(b)(2).
    A trial court faced with a proffer of prior-bad-acts
    evidence "must engage in a two-step analysis" to determine whether
    the evidence should be admitted.           United States v. Tkhilaishvili,
    
    926 F.3d 1
    , 15 (1st Cir. 2019); see also United States v. Martínez-
    Mercado, 
    919 F.3d 91
    , 101 (1st Cir. 2019).              First, the trial court
    must determine whether the evidence has a "special relevance" to
    an issue in the case.             Tkhilaishvili, 926 F.3d at 15 (quoting
    Veranda Beach Club Ltd. P'ship v. W. Sur. Co., 
    936 F.2d 1364
    , 1373
    (1st Cir. 1991)); see also United States v. Sabean, 
    885 F.3d 27
    ,
    35 (1st Cir. 2018).          "Special relevance" is a bit of a misnomer,
    for what step one requires is that the evidence be relevant "for
    - 16 -
    any purpose apart from showing propensity to commit a crime."
    United States v. Habibi, 
    783 F.3d 1
    , 2 (1st Cir. 2015) (quoting
    United States v. Doe, 
    741 F.3d 217
    , 229 (1st Cir. 2013)); see also
    Tkhilaishvili, 926 F.3d at 15 (explaining that step one of the
    analysis is satisfied if the evidence is relevant for a purpose
    other than "to show a defendant's evil inclination" (quoting
    Veranda Beach, 
    936 F.2d at 1373
    )).      If the prior-bad-acts evidence
    is relevant only for the forbidden propensity inference, then the
    evidence is inadmissible under Rule 404(b)(1) and the inquiry ends.
    See, e.g., Martínez-Mercado, 919 F.3d at 101-03.           Otherwise the
    trial court advances to step two, the application of Federal Rule
    of Evidence 403.   See, e.g., Habibi, 783 F.3d at 4.          Under Rule
    403, the trial court may exclude the prior-bad-acts evidence if it
    determines in its discretion that the probative value of the
    evidence is substantially outweighed by any unfair prejudice.         See
    Tkhilaishvili, 926 F.3d at 15; United States v. Hicks, 
    575 F.3d 130
    , 142 (1st Cir. 2009).
    With   that   prelude,   we   return   to   García's   specific
    challenge.   García contends that the district court failed to
    properly conduct each step of the Rule 404(b) analysis.          As to the
    first step, he argues that the district court erred by failing to
    require the government to specify the permissible purpose for which
    the prior-bad-acts evidence was admissible, and he further argues
    that there was no such permissible purpose.           García argues that
    - 17 -
    error at the second step flows from this initial error, for having
    failed to specify any permissible purpose for which the prior-bad-
    acts evidence was admissible, the district court was unable to
    weigh the probative value of that evidence against any unfair
    prejudice   it   could    cause.     Finally,    García   argues   that   the
    probative    value   of    the     Rule   404(b)    evidence   was   indeed
    substantially outweighed by its unfairly prejudicial effect.
    As we set out to explain, we disagree with García's
    contention that the district court failed to conduct the two steps
    of the Rule 404(b) analysis, but we agree that the outcome of that
    analysis should have been the exclusion of the Rule 404(b) evidence
    under Rule 403.      Determining that this error was also harmless,
    however, we affirm García's convictions.
    1. Step One
    As García persistently objected to the admission of the
    prior-bad-acts evidence at trial, we review the district court's
    "ruling that [this] evidence was admitted consistent with [Rule]
    404(b) . . . for abuse of discretion."             United States v. Gemma,
    
    818 F.3d 23
    , 35 (1st Cir. 2016); see also United States v. Moon,
    
    802 F.3d 135
    , 144 (1st Cir. 2015).           As we set out to explain, we
    detect no abuse of discretion at step one.
    García contends that the district court procedurally
    erred by failing to specify the particular purpose for which it
    deemed the Rule 404(b) evidence admissible.           Cf. United States v.
    - 18 -
    Arias-Montoya, 
    967 F.2d 708
    , 713 (1st Cir. 1992) (stating that
    prior-bad-acts        evidence    "should       not   be   accepted   unless   the
    government        articulates    with   suitable      precision   the     'special'
    ground for doing so" (quoting United States v. García–Rosa, 
    876 F.2d 209
    , 221 (1st Cir. 1989), vacated on other grounds sub nom.
    Rivera-Feliciano v. United States, 
    498 U.S. 954
     (1990))).                        We
    disagree.
    García never requested that the district court clarify
    the permissible purpose for which the Rule 404(b) evidence was
    admissible, and the record before us indicates that it was clear
    that       the   government   offered    this    evidence    to   prove   García's
    knowledge and intent.6           While the judge never explicitly stated
    The government's notice of intent stated that the type of
    6
    prior-bad-acts evidence which it would seek to admit "tend[s] to
    prove that a required state of mind existed at the time required
    by the instant accusations, establishing the existence of
    significant probative value." The notice further pointed out that
    "[t]he instant offenses require both that possession be knowing
    and with intent to distribute." The defense can hardly complain
    that this notice failed to communicate the purpose for which the
    government purported to offer the prior-bad-acts evidence, as it
    stated in its responsive motion that "[t]he United States is
    evidently offering this evidence to prove 'knowledge and intent.'"
    Moreover, when the court asked the government at trial to clarify
    "the issue here that makes this 404(b) testimony relevant," the
    government replied, "I think there is an issue of known possession
    and intent -- or an issue of lack of mistake. And, hence, we
    presume brother counsel is going to say, 'Oh, they were rescued.
    By [sic] my guy didn't know anything about these drugs or anything
    that was happening.'" And in a later colloquy between the judge
    and defense counsel over the evidence's admissibility, the defense
    acknowledged that it understood that the evidence was being offered
    to prove "[k]nowledge or intent."
    - 19 -
    the specific purpose for which he considered the prior-bad-acts
    evidence admissible, this alone is not error.    See United States
    v. Donovan, 
    984 F.2d 507
    , 511 (1st Cir.) (stating that "explicit
    findings under Rule 404(b) . . . are not an invariable prerequisite
    to the admission of Rule 404(b) evidence"), reheard on other
    grounds, United States v. Aversa, 
    984 F.2d 493
     (1st Cir. 1993).
    Because the government had made clear the purposes for which it
    was offering the prior-bad-acts evidence, the trial court acted
    within its discretion by not expressly stating the permissible
    relevance for which it deemed the evidence admissible.
    As to whether the prior-bad-acts evidence was in fact
    relevant to García's knowledge or intent, we agree with the
    government that it was arguably relevant to García's knowing
    participation in the cocaine smuggling operation.7     Through the
    7 We set intent aside. The government has failed to provide
    us with any case-specific explanation for how the prior-bad-acts
    evidence offered here was relevant to García's intent. Cf. United
    States v. Henry, 
    848 F.3d 1
    , 9 (1st Cir. 2017) (emphasizing that
    district courts must "carefully consider the proponent's assertion
    of why a prior [bad act] has special relevance and examine whether,
    in the particular case-specific circumstances, the proponent is
    simply attempting to disguise propensity evidence by artificially
    affixing it with the label of a permitted Rule 404(b)(2) purpose");
    see also Martínez-Mercado, 919 F.3d at 102 (cautioning that "the
    relevance of a prior conviction admitted to prove 'intent' . . .
    may rest on little more than propensity" (quoting Henry, 848 F.3d
    at 15 (Kayatta, J., concurring))); United States v. Lynn, 
    856 F.2d 430
    , 436 (1st Cir. 1988) (noting that, absent the forbidden
    propensity inference, "the probative worth of [the defendant's]
    conviction toward proving his intent to commit the instant offense
    is difficult to conceptualize").
    - 20 -
    prior-bad-acts evidence, the government sought to show that García
    had previously smuggled cocaine from South America to Puerto Rico
    by sea.        If credited, this evidence would tend to decrease the
    likelihood that García was ignorant of the illicit purpose of the
    sea voyage on which he had embarked in December 2012, an argument
    the government may have fairly anticipated given that García had
    told Agent De Jesús that the purpose of the ill-fated trip had
    been to transport gasoil.          Cf. United States v. Robles-Alvarez,
    
    874 F.3d 46
    , 51 (1st Cir. 2017) (considering evidence of prior
    drug smuggling trip relevant where defense might have argued "that
    the appellant's mere presence with [a co-conspirator] on the
    voyages was not sufficient to support a conviction").
    García complains that he never actually defended against
    the charges based on a lack of knowledge.              But knowledge was an
    element of the crimes charged that the government had to prove,
    and nowhere did García "express a clear and unequivocal intention
    to remove" the issue of knowledge from the trial.             United States
    v. Garcia, 
    983 F.2d 1160
    , 1174 (1st Cir. 1993) (emphasis omitted).
    Absent    an    "offer   to   stipulate"   or   its   practical   equivalent,
    evidence of García's knowledge was relevant to the case and not
    barred by Rule 404(b).          Id.; see also Henry, 848 F.3d at 9 ("A
    defendant's failure to argue lack of knowledge . . . does not
    'remove th[at] issue[] from the case.'" (quoting United States v.
    Pelletier, 
    666 F.3d 1
    , 6 (1st Cir. 2011))).
    - 21 -
    In short, the district court permissibly considered the
    prior-bad-acts evidence "specially" relevant for proving García's
    knowledge.    See, e.g., United States v. Lopez-Cotto, 
    884 F.3d 1
    ,
    13-14 (1st Cir. 2018).       There was no abuse of discretion at step
    one.
    2. Step Two
    Though it was acceptable for the district court to
    consider the prior-bad-acts evidence proffered by the government
    probative as to knowledge and thus not barred by Rule 404(b)(1),
    the court was nonetheless obliged to consider whether the admission
    of this evidence would unfairly prejudice García and to exclude
    the evidence if its probative value was substantially outweighed
    by its prejudicial effect.       See Fed. R. Evid. 403; Tkhilaishvili,
    926 F.3d at 15.        Because García objected to the admission of the
    prior-bad-acts evidence at trial under Rule 403, we review the
    district     court's     admission    of   the   prior-bad-acts   evidence
    notwithstanding that objection for abuse of discretion. See Gemma,
    818 F.3d at 35.
    At the outset, we reject García's contention that the
    district court failed to conduct Rule 403 balancing at all.
    Although the court did not do so explicitly, the record indicates
    that the court performed the requisite balancing implicitly.           See
    United States v. Breton, 
    740 F.3d 1
    , 15 (1st Cir. 2014) ("[T]he
    absence of an express Rule 403 finding . . . does not mean the
    - 22 -
    district judge failed to perform this analysis.").                  Prior to the
    introduction of the evidence on the third day of trial, there was
    an extensive discussion on its admissibility.                 It is clear from
    this discussion that the court understood García's objection to
    the evidence to be rooted in Rule 403.                 Moreover, the court's
    questions to counsel indicate that it considered both the prejudice
    and the probative value of this evidence.              It is also evident from
    the court's subsequent questions that it continued to consider the
    value and prejudice of the evidence as it was presented.
    Nonetheless, we disagree with the outcome of the court's
    implicit balancing.         The prior-bad-acts evidence had marginal
    permissible        relevance;     it     was     lengthy,     confusing,      and
    unaccompanied by sufficient guidance from the court; and (as is
    often the case with prior-bad-acts evidence) the potential for
    prejudice was fairly obvious.             To explain, we first review the
    prior-bad-acts evidence which the government presented.                  We then
    describe its limited permissible probative value, how that value
    was overshadowed by its potential for prejudice and confusion, and
    how   this   prejudice     and   confusion       was   not   mitigated   by   the
    instructions provided to the jury.
    The    government   used    three    witnesses    to   present   the
    prior-bad-acts evidence.         First, the two officers described their
    surveillance of a drug trafficking organization's members and
    activities.        They testified in detail about an incident in which
    - 23 -
    a cargo van that they had been surveilling fled inspection at a
    ferry terminal.   The high-speed chase which ensued ended only when
    the fleeing van lost control and crashed in a field.         The officers
    testified that they recovered from the van 525 kilograms of cocaine
    wrapped in black plastic bags.      Photographs of the van, the ferry,
    and the cocaine were all introduced into evidence.
    The officers' testimony did not connect the May 2011
    cocaine seizure to García, whom the officers never mentioned.         The
    government instead attempted to make this connection through the
    2011 informant.       This witness    testified that he knew García
    personally.   He further testified that around May 2011 there was
    a "negotiation" regarding 525 kilograms of cocaine with which
    García was involved.        The witness stated that García helped to
    coordinate the transportation of this cocaine to Puerto Rico.           A
    recording was then played aloud of a phone conversation which the
    witness described as between himself and García.        The conversation
    concerned the sale of six kilograms of cocaine.         The Rule 404(b)
    presentation concluded with defense counsel cross-examining the
    witness about his own criminal activity and plea agreements.
    Federal Rule of Evidence 403 allows a court to "exclude
    relevant   evidence    if    its   probative   value   is   substantially
    outweighed by a danger of," among other things, "unfair prejudice,
    confusing the issues, [or] misleading the jury." "Unfair prejudice
    'speaks to the capacity of some concededly relevant evidence to
    - 24 -
    lure the factfinder into declaring guilt on a ground different
    from proof specific to the offense charged.'"                 United States v.
    DiRosa, 
    761 F.3d 144
    , 153 (1st Cir. 2014) (quoting Old Chief v.
    United States, 
    519 U.S. 172
    , 180 (1997)).
    As   discussed    above,    evidence    that      García    had   been
    previously involved in maritime cocaine smuggling was relevant to
    García's knowledge that the voyage he had embarked on in December
    2012 had as its true purpose the illicit smuggling of cocaine, not
    the   innocent   transportation    of    gasoil.        But    the     government
    introduced ample evidence establishing this knowledge apart from
    the   prior-bad-acts    presentation       --    namely,      the    informant's
    extensive   testimony   about    both    his    conversations        with    García
    concerning the smuggling operation and his observations of García
    participating in the smuggling operation, as well as photographs
    of the informant's text messages with García pertaining to the
    failed December 2012 voyage. This independent evidence of García's
    knowledge undermined the marginal value of the prior-bad-acts
    evidence to the government's case.             See Varoudakis, 
    233 F.3d at 123
     (finding that prior-bad-acts evidence ought to have been
    excluded under Rule 403 where "the government did not need the
    [prior-bad-acts] evidence to prove [the defendant's] knowledge");
    cf. Lynn, 
    856 F.2d at 436
     (questioning the probative value of
    prior-bad-acts     evidence    offered    to     show   intent       where    "the
    government would have succeeded in proving intent should the jury
    - 25 -
    believe the testimony of [other witnesses], rendering negligible
    their [sic] need to show intent by the prior bad acts").
    And while the probative value of the prior-bad-acts
    evidence was thus relatively low, the prejudice worked by its
    admission was comparatively high due to the danger it presented of
    confusing    the   jury     and   luring     it   into   forbidden    propensity
    reasoning. The Rule 404(b) evidence related to a separate cocaine-
    smuggling operation not straightforwardly connected to García.
    Consequently, its introduction resulted in a "mini-trial" through
    which the government sought to establish that García really was
    implicated in the May 2011 cocaine seizure.              See United States v.
    Gilbert, 
    229 F.3d 15
    , 24 (1st Cir. 2000) (rejecting government's
    challenge to the exclusion of prior-bad-acts evidence in part
    because district court's "concerns about the extent to which
    [whether the prior bad act had even occurred] would have to be
    litigated during the course of trial" were warranted).                The prior-
    bad-acts evidence presented in this case spanned three witnesses
    and two days of trial, it sparked the introduction of photographs
    and   the   playback   of    a    recorded   phone   call,   and     it   required
    considerable detective work by the jury to draw from the disjointed
    pieces of this colorful presentation the conclusion that García
    had been involved with the May 2011 cocaine shipment.
    Moreover, to avoid improper use of this evidence, the
    jury would have had to close its mind to the all-too tempting
    - 26 -
    inference that because García had been involved with a cocaine
    smuggling conspiracy in 2011 he was more likely to have been
    involved with a cocaine smuggling conspiracy in 2012-2014.                      See
    Varoudakis,    
    233 F.3d at 123
         ("[T]he   more   the    prior    bad   act
    resembles the crime, the more likely it is that the jury will"
    fall into forbidden propensity reasoning); Lynn, 
    856 F.2d at 436
    ("The   ordinary     inference    here    would    seem   very   close     to   the
    inference the Rule was designed to avoid.").               Instead, the jury
    would have had to infer from all the evidence presented of the May
    2011 cocaine seizure only that García knew that he was not out
    transporting gasoil when he was rescued in December 2012.                   In the
    circumstances of this case, the permitted use of the Rule 404(b)
    evidence was much less natural and intuitive than the forbidden
    propensity use, adding to the danger of unfair prejudice.
    Sometimes careful limiting instructions can cure the
    prejudice     that    would      otherwise     render     inappropriate         the
    introduction of prior-bad-acts evidence.            See, e.g., United States
    v. Manning, 
    79 F.3d 212
    , 217 (1st Cir. 1996) (stating that "[t]he
    district court minimized any prejudicial impact of the prior drug
    dealing evidence by instructing the jury, contemporaneously and
    again in its final instructions, about the proper use of prior bad
    act evidence").
    But    for   limiting        instructions      to    be      "suitably
    prophylactic" in the Rule 404(b) context, they must guide the
    - 27 -
    jury's attention away from the forbidden propensity inference by
    clearly directing it toward the specific permissible relevance
    that the prior-bad-acts evidence has to the case.           Sabean, 885
    F.3d at 38, 35 (quoting United States v. Mehanna, 
    735 F.3d 32
    , 64
    (1st   Cir.     2013))   (considering   sufficiently   curative   court's
    instructions to the jury "that the government was offering the
    [Rule 404(b)] testimony "as evidence of what the Government says
    is the defendant's motive to commit the [crimes charged]" and that
    the evidence was to be considered only for this specified, limited
    purpose); United States v. Newsom, 
    452 F.3d 593
    , 606 (6th Cir.
    2006) (urging district courts to include in jury instructions "the
    specific factor named in the rule that is relied upon to justify
    admission of the [prior bad] acts evidence" (quoting United States
    v. Johnson, 
    27 F.3d 1186
    , 1194 (6th Cir.1994))); see also Pattern
    Criminal Jury Instructions for the District Courts of the First
    Circuit, § 2.06, cmt. 3 (updated July 28, 2014) ("Courts should
    encourage counsel to specify and limit the purpose or purposes for
    which prior act evidence is admitted . . . . Instructions for
    purposes other than that for which the specific evidence was
    admitted should not be given.").
    Here, the trial court twice cautioned the jury about the
    limited proper use of the prior-bad-acts evidence.           Before the
    2011 informant testified, the court told the jury that the prior-
    bad-acts evidence was not to be used to infer García's propensity
    - 28 -
    for criminal behavior, but was only to be used "to show that he
    may have had a motive, an opportunity, an intent, or to prove
    preparation, plan, knowledge, identity, absence of mistake or lack
    of accident in what he did."   In giving the jury its final charge,
    the court provided a similarly all-encompassing instruction:
    You have heard evidence that the Defendant
    previously committed acts similar to those
    charged in this case. You may not use this
    evidence to infer that, because of his
    character, the Defendant carried out the acts
    charged in this case.      You may, however,
    consider this evidence only for the limited
    purpose of deciding whether the Defendant had
    the state of mind or intent necessary to
    commit the crimes charged in the indictment,
    or whether the Defendant had a motive or the
    opportunity to commit the acts charged in the
    indictment, or whether the Defendant acted
    according to a plan or in preparation for
    commission of a crime, or whether the
    Defendant committed the acts he is on trial
    for by accident or mistake.
    This latter instruction was specifically requested by defense
    counsel, and the omnibus nature of both instructions tracks the
    explanations of the permissible relevance of the prior-bad-acts
    evidence provided several times to the court by the government at
    sidebar.
    Given that both parties promoted these instructions, it
    is certainly understandable that the district court provided them.
    Nonetheless,   the   overinclusive   nature   of   the   instructions
    prevented them from focusing the jury's attention on the one
    permissible use of the prior-bad-acts evidence in this case: to
    - 29 -
    prove       that       Garcia   likely   would     not    have   confused    a   ship
    transporting gasoil with a ship engaged in smuggling a large
    shipment of cocaine.              Without case-specific guidance on how to
    otherwise use the prior-bad-acts evidence, it was all too likely
    that       the   jury     would    engage    in   the    forbidden   but    intuitive
    propensity reasoning.             See Varoudakis, 
    233 F.3d at 125
     (explaining
    that the propensity inference "is not rejected because character
    is irrelevant; on the contrary, it is said to weigh too much with
    the jury and to so overpersuade them as to prejudge one with a bad
    general record and deny him a fair opportunity to defend against
    a particular charge" (quoting Michelson v. United States, 
    335 U.S. 469
    , 475–76 (1948))).             Neither instruction effectively trained the
    jury's attention on the narrow, permissible use of the prior-bad-
    acts evidence in this case (to establish knowledge), and so we are
    doubtful that the instructions prevented misuse of the prior-bad-
    acts evidence or dispelled confusion about that evidence's proper
    relevance to the crimes charged.              Consequently, we cannot consider
    these instructions "suitably prophylactic," Sabean, 885 F.3d at 38
    (quoting Mehanna, 735               F.3d at 64);        they did not effectively
    mitigate         the    prejudice    posed   by   the    prior-bad-acts      evidence
    admitted in this case.8
    To be clear, the misstep we identify is not the provision
    8
    of the instructions, in which both parties had a hand, but the
    admission of the overly prejudicial, minimally valuable prior-bad-
    acts evidence, whose prejudice the instructions did not cure.
    - 30 -
    In sum, "[t]he propensity danger of the [prior-bad-acts]
    evidence was unmistakable" here, and substantially outweighed its
    limited probative value.     Varoudakis, 
    233 F.3d at 124
    .       The
    district court exceeded the bounds of its discretion when it
    implicitly determined otherwise.
    3. Harm
    We turn to whether the erroneous admission of the Rule
    404(b) evidence in this case prejudiced García.   "An error will be
    treated as harmless only if it is 'highly probable' that the error
    did not contribute to the verdict."     United States v. Kilmartin,
    
    944 F.3d 315
    , 338 (1st Cir. 2019) (quoting United States v. Fulmer,
    
    108 F.3d 1486
    , 1498 (1st Cir. 1997)).   To analyze whether an error
    was harmless we must divine from "the record as a whole . . . the
    probable impact of the improper evidence upon the jury."    Fulmer,
    
    108 F.3d at 1498
     (quoting United States v. Melvin, 
    27 F.3d 703
    ,
    708 (1st Cir. 1994)).   In doing so, we consider factors such as
    "the centrality of the tainted material, its uniqueness, its
    prejudicial impact, the uses to which it was put during the trial,
    [and] the relative strengths of the parties' cases."     Kilmartin,
    944 F.3d at 338 (quoting United States v. Piper, 
    298 F.3d 47
    , 57
    (1st Cir. 2002)).    In a criminal case, the crucial factor is
    typically "the strength or weakness of the government's evidence
    of guilt" less the improperly admitted evidence.     Kilmartin, 944
    F.3d at 338.
    - 31 -
    The admission of the prior-bad-acts evidence in this
    case, though error, was harmless.            The government's case against
    García was strong.      García was found on a small sinking boat off
    the coast of Puerto Rico without any plausible explanation for how
    he had gotten there, and his boat-mate provided a detailed, first-
    hand narrative that explained the occurrence as one of a series of
    cocaine smuggling ventures in which García had participated.                   His
    mate's testimony was corroborated in other respects by records of
    his text messages (which the mate described as a discussion between
    himself and García about García's having met with one of the
    smuggling   organization's       leaders     to   discuss    the   failed     2012
    operation), and by the successful cocaine seizure at Guayanilla,
    and it was in all respects uncontradicted.            We therefore consider
    it "highly probable" that the admission of the evidence pertaining
    to the May 2011 cocaine seizure was not a determinative factor in
    the jury's guilty verdict.        See id.
    D. Cumulative Error
    Finally, García argues that his convictions should be
    vacated based on the collective impact of the evidentiary missteps
    in his trial.     We accept that the cumulative prejudicial effect of
    independently innocuous trial errors may warrant a new trial. See,
    e.g., United States v. Peña-Santo, 
    809 F.3d 686
    , 702 (1st Cir.
    2015)   ("[I]ndividual    errors,       insufficient        in   themselves     to
    necessitate   a   new   trial,    may   in    the   aggregate      have   a   more
    - 32 -
    debilitating effect." (quoting United States v. Sepúlveda, 
    15 F.3d 1161
    , 1195–96 (1st Cir. 1993))).           But here, for the same reasons
    that   we   find   each   of    the   evidentiary   errors   which    we   have
    identified harmless, we find them collectively so as well.
    The convictions are therefore affirmed.
    III. SENTENCING CHALLENGE
    García argues that his sentence is unreasonable on two
    grounds.        First, he argues that the district court erred by
    imposing    a    supervisory     role   enhancement    without   identifying
    evidence that García played a supervisory role in the conspiracy.
    Second, García argues that there is an unwarranted disparity
    between his sentence and those of his codefendants.                  Though we
    find the second claim to lack merit, we agree with García that the
    record does not support the imposition of the supervisory role
    enhancement.
    A. Standard of review
    Since García also raised before the district court the
    challenges to his sentence based upon both the supervisory role
    enhancement      and   the     purportedly     unwarranted   sentence-length
    disparity, his claims are preserved on appeal.               García fashions
    these claims as both procedural and substantive challenges to his
    sentence.
    When considering a preserved claim that a sentence is
    the result of procedural error, we review the district court's
    - 33 -
    "interpretations and applications of the [sentencing] guidelines"
    de novo, its judgment-calls for abuse of discretion, and its
    factual findings for clear error.       United States   v.   Flores-
    Quinoñes, 
    985 F.3d 128
    , 133 (1st Cir. 2021) (quoting United States
    v. Reyes-Torres, 
    979 F.3d 1
    , 7 (1st Cir. 2020)); see also United
    States v. Reyes-Santiago, 
    804 F.3d 453
    , 468 (1st Cir. 2015).
    When faced with a preserved claim that a sentence is
    substantively unreasonable, we review for abuse of discretion.
    Flores-Quiñones, 985 F.3d at 133. Under this deferential standard,
    we will affirm a sentence as reasonable so long as the sentencing
    court's rationale is "plausible" and the sentence is "defensible."
    United States v. Gierbolini-Rivera, 
    900 F.3d 7
    , 12 (1st Cir. 2018)
    (quoting United States v. Martin, 
    520 F.3d 87
    , 96 (1st Cir. 2008));
    see also Reyes-Santiago, 804 F.3d at 468.
    B. Supervisory role enhancement
    As recommended in the PSR, the district court imposed a
    two-level enhancement to García's base offense level pursuant to
    §3B1.1(c) of the United States Sentencing Commission Guidelines
    Manual (Nov. 2016) ("the Guidelines" or "U.S.S.G."), which allows
    for such an increase "if the defendant was an organizer, leader,
    manager, or supervisor" in the offense.9    We set out the relevant
    9 Section 3B1.1(c) applies to "criminal activity involv[ing]
    at least two, but fewer than five, complicit individuals." United
    States v. Ilarraza, 
    963 F.3d 1
    , 13 (1st Cir. 2020)(quoting United
    States v. Al-Rikabi, 
    606 F.3d 11
    , 14 (1st Cir. 2010)). Since the
    - 34 -
    legal      principles    first   and    then     address      García's     particular
    arguments.
    The determination of which type of role a defendant
    played in an offense is a factual one, reversible only if clearly
    erroneous.      See Ilarraza, 963 F.3d at 13; see also United States
    v.   Cortez-Vergara,       
    873 F.3d 390
    ,    393    (1st    Cir.      2017).     At
    sentencing, "[t]he government bears the burden of proving that an
    upward role-in-the-offense adjustment is appropriate in a given
    case."      Al-Rikabi, 606 F.3d at14. To properly impose the upward
    adjustment,      the     sentencing     court    must    be    satisfied      that   a
    preponderance of the evidence supports the government's claim that
    the defendant acted as an organizer, leader, manager, or supervisor
    in the commission of the offense.               Id.; see also United States v.
    Medina, 
    167 F.3d 77
    , 79 (1st Cir. 1999).
    A supervisory or managerial role is evidenced by some
    "manifestation      of    authority"      on    the    part    of   the    defendant.
    Savarese, 686 F.3d          at 20.10      The authority possessed by the
    drug-smuggling conspiracy at issue in this case involved nineteen
    codefendants, it is unclear why the PSR recommended the aggravating
    role enhancement pursuant to §3B1.1(c) rather than pursuant to
    §§3B1.1(a) or (b), which are expressly applicable to more extensive
    criminal activity.    But the government has not challenged the
    sentence, and the use of §3B1.1(c) benefits rather than harms the
    defendant. Therefore, we analyze whether García qualified for an
    enhancement under §3B1.1(c) without regard for the extensivity of
    the underlying criminal activity. See United States v. Savarese,
    
    686 F.3d 1
    , 21 n.16 (1st Cir. 2012).
    10The Guidelines generally distinguish "leadership [or]
    organizational role[s] from one[s] of mere management or
    - 35 -
    defendant may be fairly minimal; "a defendant need not be at the
    top of a criminal scheme to be a manager or supervisor."          United
    States v. Goldberg, 
    105 F.3d 770
    , 777 (1st Cir. 1997).         "[W]e have
    even held that, in some circumstances, the government need only
    show by a preponderance of the evidence          'that the defendant
    exercised authority or control over another participant on one
    occasion.'"   Savarese, 686 F.3d at 20 (quoting United States v.
    García–Morales, 
    382 F.3d 12
    , 20 (1st Cir. 2004)); see also United
    States v. Cruz, 
    120 F.3d 1
    , 3-4 (1st Cir. 1997) (en banc).             Yet
    not all roles arguably termed "supervisory" warrant an enhancement
    under   §3B1.1(c).   The    enhancement   is   proper   only   where   the
    defendant exercised some degree of authority or control over
    another criminal actor; that the defendant may have managed or
    supervised a particular criminal activity is insufficient.        United
    States v. Prange, 
    771 F.3d 17
    , 34 (1st Cir. 2014); see also Flores-
    De-Jesús, 
    569 F.3d at 35
    .
    supervision," U.S.S.G. §3B1.1, cmt. n.4, with the latter roles
    denoting less responsibility, id. at cmt. background.       Under
    §3B1.1(c), however, the distinction lacks a difference, since a
    defendant found to have played any of these four roles warrants
    the same two-level enhancement to his base level offense.
    Accordingly, even though the PSR adopted by the sentencing court
    found that "the defendant was considered to be a leader in the
    organization," it was not error to impose the enhancement as long
    as the defendant could have been found to be merely a manager or
    supervisor. We therefore focus on whether this lower bar was met.
    - 36 -
    With   this   background   in     mind,    we    turn     to   García's
    arguments.     First,     García   argues    that     it    was   error     for    the
    sentencing court to fail to make specific findings to support the
    upward adjustment based on García's alleged supervisory role.
    Second, García argues that it was error for the court to find that
    García had a supervisory role in the smuggling organization,
    contending that the trial evidence established at most that he was
    a mere "stevedore, loading and unloading cargo at both ends of a
    venture."     There is some force to the first claim, but our
    agreement with the second determines the appropriate relief here.
    "Without      reasonably    specific           findings        or     some
    satisfactory surrogate in the record, we are unable to engage in
    meaningful review to determine whether the decision [to impose a
    role-in-the-offense enhancement] was clearly erroneous."                        Medina,
    
    167 F.3d at 80
    .      Of course, "sentencing judges need not explain
    their reasoning in exquisite detail, especially when the reasons
    are 'evident from the record.'"             United States v. Zehrung, 
    714 F.3d 628
    , 631 (1st Cir. 2013) (quoting United States v. Stella,
    
    591 F.3d 23
    , 28 (1st Cir. 2009)).           "But . . . in the end we must
    be able to figure out what they 'found and the basis for the
    findings to the extent necessary to permit effective appellate
    review.'"    Id. at 632 (quoting United States v. Van, 
    87 F.3d 1
    , 3
    (1st Cir. 1996)).         As the Supreme Court has stressed, "[b]y
    articulating reasons, even if brief, the sentencing judge . . .
    - 37 -
    assures reviewing courts (and the public) that the sentencing
    process is a reasoned process."    Rita v. United States, 
    551 U.S. 338
    , 357 (2007).   Particularly where the underlying facts of a
    case involve multiple transactions and a web of participants, and
    where the PSR "does not even minimally focus on the specific
    considerations necessary" to support a finding that a defendant
    occupied an aggravating role in the offense, "it is necessary that
    the district judge make sufficient findings to articulate the
    rationale" for the aggravating role enhancement.     United States
    v. Catano, 
    65 F.3d 219
    , 230 (1st Cir. 1995).
    Here, as in Catano, "[n]either the PSR nor the sentencing
    transcript discusses [the defendant's] involvement or identifies
    why" the defendant was considered a manager or supervisor in the
    cocaine smuggling conspiracy.     
    Id.
       At the sentencing hearing,
    García personally and through counsel argued that García did not
    have a supervisory role in the smuggling organization.         The
    district court did not directly respond but stated that García's
    base offense level was increased two levels pursuant to §3B1.1(c)
    "[b]ecause he was an organizer, leader, manager, or supervisor in
    the criminal activity," and that "the pre-sentence investigation
    report satisfactorily reflects the components of Mr. García's
    offense by considering its nature and circumstances."
    The PSR, in turn, states in support of the §3B1.1(c)
    enhancement only that "[a]ccording to trial notes and discovery
    - 38 -
    reports, the defendant was considered to be a leader in the
    organization."    This is curious, because elsewhere the PSR has a
    section entitled "Roles of the Members of the Conspiracy," and
    though it lists the conspiracy's "leaders," that list does not
    include García.    Instead, García is listed as a "transporter."
    The only other facts in the PSR pertinent to García's role are
    found in the section "Acceptance of Responsibility."         There, the
    PSR states that García "noted that he did not give orders to
    anybody," "acknowledge[d] that he supported [a co-conspirator],"
    and "noted that he did not supervise anybody."
    That neither the PSR nor the district court offered any
    explanation for rejecting García's claim that he was neither a
    leader nor a supervisor in the organization complicates our review,
    for a defendant being sentenced "is entitled to reasoned findings,
    on   a   preponderance   standard,   not   to   an   appellate   court's
    assumptions drawn free-form from an inscrutable record."         Catano,
    
    65 F.3d at 230
     (quoting United States v. McDowell, 
    918 F.2d 1004
    ,
    1012 n.8 (1st Cir. 1990)).
    The government argues that the dearth of fact-finding in
    support of the §3B1.1(c) enhancement does not warrant remand in
    this case because the basis for the enhancement was "evident from
    the record," Zehrung, 714 F.3d at 631 (quoting Stella, 
    591 F.3d at 28
    ), obviating the need for the district court to explain its
    reasoning.   We disagree.
    - 39 -
    There is    no evidence in the record to support the
    government's claim that García oversaw any of the organization's
    workers.       Rather,    the    portions   of    the    record        cited    by    the
    government show only that García packaged and waterproofed the
    drugs and chatted with others about the operation.                      The evidence
    which most strongly supports the government's characterization of
    García is the informant's testimony that one of the conspiracy's
    leaders had told him that García "was going to take care of
    organizing the entire [October 2013] trip."                 But when asked on
    direct to clarify what García was organizing, the informant replied
    "the cocaine, what I was going to be carrying."                 And the government
    points to no evidence showing that García ever directed a single
    person to perform a single task for the conspiracy.                       See United
    States v. Fuller, 
    897 F.2d 1217
    , 1221 (1st Cir. 1990); United
    States v. Altagracia Castillo, 
    145 F. App'x 683
    , 685 (1st Cir.
    2005); Cf. García–Morales, 
    382 F.3d at 20
    .
    We cannot agree with the government that it was evident
    from   this    record     that   the   supervisory       role    enhancement          was
    warranted.      While it appears that García was in charge of certain
    tasks, like preparing the cocaine for the voyage and inspecting it
    upon   arrival,     the     government's        burden   was      to     show    by    a
    preponderance of the evidence that García exercised authority or
    control over other participants in the smuggling venture.                             See
    Prange, 771 F.3d at 34; cf. Flores-De-Jesús, 
    569 F.3d at
    35
    - 40 -
    (stating that evidence that defendant "ke[pt] the drug point well-
    stocked and collect[ed] the proceeds . . . is insufficient to
    establish the requisite control over another criminal actor that
    our case law requires").
    This the government has not done.             Nor could it, there
    being no evidence in the record that García managed or supervised
    at least one other person.        Thus, the role-in-the-offense finding
    is clearly erroneous, and resentencing is warranted.                 See, e.g.,
    Al-Rikabi, 
    606 F.3d at 16
     (vacating sentence and remanding for
    resentencing where district court's finding that defendant "was an
    organizer,        leader,   manager,    or     supervisor"   under     U.S.S.G.
    §3B1.1(c) was clearly erroneous); United States v. Ramos-Paulino,
    
    488 F.3d 459
    , 464 (1st Cir. 2007) (same).
    C. Disparities
    Finally, García argues that his sentence is unreasonable
    because it is significantly longer than the sentence imposed upon
    several of his co-conspirators.          See 
    18 U.S.C. § 3553
    (a)(6) ("The
    court, in determining the particular sentence to be imposed, shall
    consider . . . the need to avoid unwarranted sentence disparities
    among defendants with similar records who have been found guilty
    of similar conduct.").        Indeed, García's approximately 224-month
    sentence     is     six-and-a-half     years    longer   than   any    of    his
    codefendants' sentences and more than double the sentence imposed
    on the conspiracy's head honcho, Francisco Merán Montero.                   This
    - 41 -
    disparity is problematic, García avers, because many of these
    codefendants were bigger fish in the criminal syndicate than García
    and responsible for smuggling greater quantities of cocaine.            We
    review the consistency of García's sentence with § 3553(a)(6) for
    abuse of discretion, see United States v. Bedini, 
    861 F.3d 10
    , 21
    (1st Cir. 2017); United States v. Acevedo, 
    824 F.3d 179
    , 186 (1st
    Cir. 2016), and we find no such abuse here.
    "[A] sentence may be 'substantively unreasonable because
    of the disparity with the sentence given to a codefendant.'"
    Reyes-Santiago, 804 F.3d at 467 (quoting United States v. Reverol-
    Rivera, 
    778 F.3d 363
    , 366 (1st Cir. 2015)). But "'[a] well-founded
    claim of disparity' must compare 'apples . . . to apples.'"
    Bedini, 861 F.3d at 21 (quoting United States v. Mateo–Espejo, 
    426 F.3d 508
    , 514 (1st Cir. 2005)).        Consequently, a disparity claim
    will not succeed if there are "material differences between [the
    complaining defendant's] circumstances and those of their more
    leniently   punished     confederates."     United   States   v.   Galindo-
    Serrano, 
    925 F.3d 40
    , 52 (1st Cir. 2019) (quoting Reyes-Santiago,
    804 F.3d at 467).
    Here, there is no undue disparity.             The fact that
    García's co-conspirators received shorter sentences than García is
    fully   explained   by    their   materially   different   circumstances.
    Whereas García went to trial, his codefendants pled guilty.           See,
    e.g., Galindo-Serrano, 925 F.3d at 52; Bedini, 861 F.3d at 21-22;
    - 42 -
    see also Reyes-Santiago, 804 F.3d at 467 (noting that it is
    "permissible [to] distin[guish] between co-defendants who go to
    trial and those who plead guilty, between those who cooperate and
    those who do not" (internal citations omitted)).                    The plea deals
    accepted     by     García's        codefendants          include    drug-quantity
    stipulations      which    account    for    much    of    the   disparity   García
    complains of.       And "to the extent [García] is challenging fact-
    bargaining in general . . . th[is] argument[] also fail[s].                      We
    have upheld the practice generally."                United States v. Hall, 
    557 F.3d 15
    , 21 (1st Cir. 2009); see also United States v. Rodriguez,
    
    162 F.3d 135
    , 152-53 (1st Cir. 1998).
    Finally,       because    García    never       requested   a   downward
    variance based upon the disparity, cf. Robles-Alvarez, 874 F.3d at
    52-53, but merely used the disparity argument in support of his
    recommended Guidelines calculation, and because the reason for the
    disparity was apparent from the plea agreements, the district court
    acted within its discretion by declining to specifically address
    García's disparity argument at sentencing, see United States v.
    Rivera-Morales, 
    961 F.3d 1
    , 20 (1st Cir. 2020).                        As either a
    procedural     or   a     substantive       challenge,      therefore,     García's
    disparity-based objection to his sentence fails.
    IV. CONCLUSION
    For the foregoing reasons, we affirm the convictions but
    vacate the sentence and remand for resentencing.
    - 43 -