United States v. Evans Santos Diaz ( 2020 )


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  •                                   PRECEDENTIAL
    UNITED STATES COURT OF APPEALS
    FOR THE THIRD CIRCUIT
    _____________
    No. 18-2157
    UNITED STATES OF AMERICA
    v.
    EVANS SAMUEL SANTOS DIAZ,
    Appellant
    On Appeal from the United States District Court
    for the Middle District of Pennsylvania
    (District Court No.: 3-16-cr-00085-006)
    District Judge: Honorable Malachy E. Mannion
    Argued November 12, 2019
    (Opinion Filed: February 25, 2020)
    Before: JORDAN, SCIRICA, and RENDELL, Circuit Judges
    Sean A. Camoni (Argued)
    Evan J. Gotlob
    Office of the United States Attorney
    235 North Washington Avenue
    P.O. Box 309, Suite 311
    Scranton, PA 18503
    Counsel for Appellee
    Jacob Schuman (Argued)
    Brett G. Sweitzer
    Federal Community Defender Office
    for the Eastern District of Pennsylvania
    601 Walnut street
    The Curtis Center, Suite 540 West
    Philadelphia, PA 19106
    Counsel for Appellant
    OPINION
    RENDELL, Circuit Judge:
    Appellant Evans Santos Diaz challenges his conviction
    for conspiracy to distribute and possess with intent to distribute
    heroin and cocaine, raising three distinct objections. While we
    are concerned that the District Court may not have been as
    2
    attentive to Diaz’s complaints regarding his counsel as it
    should have been, and concerned as well that certain testimony
    by a government witness violated Rule 701, we will
    nonetheless deny his request for a new trial. We also conclude
    that the District Court did not clearly err when it attributed
    more than 20 grams of heroin to Diaz at sentencing.
    Accordingly, we will affirm.
    I.     Background
    Evans Santos Diaz was charged, along with five co-
    defendants, with conspiracy to distribute and possess with
    intent to distribute drugs. One of the co-defendants, Jeffrey
    Guzman, orchestrated the conspiracy. He distributed to
    co-defendants Richard Chalmers, Louis Bracey, Landy Then,
    and Diaz, and periodically involved his mother, co-defendant
    Magdalena Alvarez, as well. All five of Diaz’s co-defendants
    pled guilty, but Diaz chose to exercise his right to a trial.
    A. Pretrial Complaints about Counsel
    After being indicted, Diaz represented that he could not
    afford counsel, and a magistrate judge assigned Criminal
    Justice Act (CJA) counsel, Deborah Albert-Heise to represent
    him. A few months later, however, Ms. Albert-Heise accepted
    a position as an assistant district attorney and withdrew. The
    District Court then appointed Joseph O’Brien on July 13, 2016.
    Dissatisfied with O’Brien, Diaz requested new counsel
    in an August letter to the Clerk of Court. Diaz stated that
    O’Brien pressured him to plead guilty, did not accept Diaz’s
    advice on submitting pretrial motions, and failed to turn over
    discovery to him. In response to Diaz’s pro se motion, the
    3
    District Court promptly held a hearing to inquire into the
    problems with the representation. At the hearing, the Court
    asked both O’Brien and Diaz about the issues and attempted to
    explain to Diaz that O’Brien was an excellent lawyer. Diaz
    still insisted that he wanted the Court to appoint new counsel,
    and the District Court appointed Joseph Kalinowski on August
    29, 2016.
    On December 5, 2016, Diaz wrote to the District Court
    to request certain documents and informed the Court that he
    had not received anything from counsel. In response, the Court
    issued an order acknowledging receipt of Diaz’s letter and
    directing the Clerk to forward a copy of the letter to counsel
    for a response. The record does not reflect any response from
    counsel.
    On February 7, 2017, Diaz again wrote to the Court to
    request assistance obtaining discovery and advised that he was
    concerned about Kalinowski’s failure to communicate with
    him. In response to this letter, on February 14, 2017, the
    District Court ordered Kalinowski to file a response to Diaz by
    February 21. Kalinowski never complied with that order.
    On February 22, following Kalinowski’s failure to
    comply with the February 21 deadline, Diaz requested new
    counsel. In a pro se letter, he wrote that Kalinowski “fails to
    answer my letters and requests for discovery materials. . . . I
    am requesting that you consider appointing me new counsel.”
    App. at 94. The Court did not then seek any additional
    information from Kalinowski or Diaz, nor did it inquire further
    or schedule any hearing to address the request to replace
    Kalinowski.
    4
    One month after the request for new counsel, on March
    24, Kalinowski filed a motion for continuance in which he
    represented:
    The Defendant has submitted a letter to the Court
    which is being considered as a request for new
    counsel. After a meeting between counsel and
    the Defendant on March 23, 2017, all issues
    between counsel and the Defendant have been
    resolved and the Defendant wishes to continue
    with counsel’s representation.
    App. at 102–03. The District Court granted the continuance
    without commenting on Diaz’s request for new counsel. Diaz
    and Kalinowski then appeared together on April 7 for a pretrial
    conference. At the conference, neither Diaz nor Kalinowski
    raised any issue related to the request or the representation.
    Ten days after the pretrial conference, on April 17, Diaz
    again wrote to the District Court complaining of Kalinowski’s
    failure to adequately represent him or to provide discovery. In
    the letter, he reminded the Court that Kalinowski never
    responded to the Court’s February 14 order and again stated
    that Kalinowski neither responded to Diaz’s letters nor visited
    him. On June 29, Diaz wrote to the Court complaining of
    Kalinowski’s failure to respond, repeated motions for
    continuance, and failure to provide discovery. Diaz did not,
    however, renew his request for new counsel either before or at
    trial. On August 16, the case proceeded to trial with
    Kalinowski representing Diaz.
    5
    B. Officer Gula’s Testimony at Trial
    At trial, the government introduced evidence of Jeffrey
    Guzman’s conspiracy and Diaz’s role in it, including the
    testimony of Drug Enforcement Administration (DEA) Task
    Force Officer Jason Gula. The government asked Officer Gula
    about the members of the conspiracy and requested that he
    “briefly describe in summary how each of these individuals
    were involved.” App. at 254. Gula testified that Guzman was
    the head of the operation; that Landy Then, Richard Chalmers,
    and Louis Bracey bought drugs from Guzman and sold them to
    their own customers; and that Guzman’s mother helped move
    and deliver the drugs. The government then asked, “how about
    the Defendant, Evans Samuel Santos Diaz, how is he involved
    in this case?” App. at 256. Gula responded, “Evans Santos
    Diaz through the investigation we identified as being basically
    a subordinate of Jeffrey Guzman, working at the direction of
    Jeffrey Guzman, bagging up drugs for Jeffrey Guzman,
    distributing on behalf of Jeffrey Guzman, and also distributing
    to his own customers, which we learned through the
    investigation.” 
    Id. Gula also
    testified about intercepted communications
    between Diaz and others and between others talking about
    Diaz. He repeatedly testified as to the meaning and
    significance of those communications. After the testimony of
    several other witnesses, including co-defendants Guzman and
    Alvarez, and the introduction of text messages and recorded
    phone calls, the jury convicted Diaz of conspiring to distribute
    6
    and possess with intent to distribute heroin, cocaine, and
    crack. 1
    C. Sentencing
    According to the presentence investigation report
    (PSR), Diaz’s offense involved 30 grams of heroin and 1 gram
    of cocaine. This resulted in a base offense level of 16.
    U.S.S.G. § 3C1.1. Diaz objected to the drug quantity
    determination, arguing that the evidence only supported a
    finding of 15 grams. The District Court considered the
    arguments of Diaz and the government. Based on the text
    messages and intercepted communications related to Diaz
    introduced at trial and on the fact that all of Diaz’s co-
    conspirators were responsible for much greater amounts, the
    Court concluded that 30 grams was an appropriate amount to
    attribute to Diaz. After adopting the PSR’s conclusion that the
    drug quantity made the proper base offense level 16, with an
    enhancement for obstruction of justice bringing the adjusted
    offense level to 18, the District Court sentenced Diaz to 33
    months imprisonment and three years of supervised release.
    II.   Discussion
    Diaz raises three issues on appeal: (1) the District
    Court’s failure to inquire into his motion for appointment of
    new counsel, (2) the improper admission of Officer Gula’s
    testimony, and (3) the Court’s attribution of more than 20
    grams of heroin to Diaz at sentencing. We address each in turn.
    1
    The government amended the count to reflect only heroin and
    cocaine.
    7
    A. The District Court’s Failure to Inquire
    We review for abuse of discretion a district court’s
    decision not to permit substitution of counsel. See United
    States v. Goldberg, 
    67 F.3d 1092
    , 1097 (3d Cir. 1995).
    Generally, “[w]hen a defendant requests a substitution of
    counsel . . . the district court must engage in at least some
    inquiry as to the reason for the defendant’s dissatisfaction with
    his existing attorney.” United States v. Welty, 
    674 F.2d 185
    ,
    187 (3d Cir. 1982). In the course of the inquiry, the defendant
    must demonstrate good cause for appointment of new counsel,
    “such as a conflict of interest, a complete breakdown in
    communication, or an irreconcilable conflict with his
    attorney.” 
    Id. at 188.
    Although the requisite inquiry may
    consider a variety of sources and need not include a one-on-
    one colloquy with the defendant, we have noted the importance
    of allowing the defendant, as well as counsel, the opportunity
    to be heard on the matter. See United States v. Hodge, 
    870 F.3d 184
    , 202 (3d Cir. 2017).
    Under our precedent concerning district courts’
    obligation to inquire when a defendant lodges complaints
    regarding counsel’s representation, the facts here present a
    close case. Initially, the District Court appears to have made
    little or no effort to probe Diaz’s request that Kalinowski be
    replaced. Typically, if a district court fails to make “any on-
    the-record inquiry as to the reasons for the defendant’s
    dissatisfaction with his existing attorney,” it abuses its
    discretion. McMahon v. Fulcomer, 
    821 F.2d 934
    , 944 (3d Cir.
    1987); 
    Goldberg, 67 F.3d at 1098
    ; 
    Welty, 674 F.2d at 190
    . We
    have not made that obligation dependent upon the number of
    times a defendant has made this request. We have specifically
    instructed that a Court must “engage in at least some inquiry,”
    8
    “[e]ven when the trial judge suspects that the defendant’s
    contentions are disingenuous, and motives impure.”
    
    McMahon, 821 F.2d at 942
    (citation omitted). The District
    Court’s inaction would thus normally raise serious questions,
    particularly given that Diaz complained not only about strategy
    but also about a total lack of communication. But this case
    presents a unique circumstance. Soon after Diaz made his
    request, the District Court had good reason to believe
    Kalinowski was communicating with Diaz such that Diaz’s
    request was withdrawn or moot. On these facts—particularly
    given the deference owed the District Court under the abuse of
    discretion standard—we cannot conclude that the Court’s lack
    of inquiry constituted an abuse of discretion.
    It is clear that the Court was aware of Diaz’s concerns,
    and it took some action to remedy the situation when it ordered
    Kalinowski to file a response to Diaz’s December 5 letter. The
    District Court did not follow up on this order or insist that
    Kalinowski respond to Diaz’s complaints, nor did it schedule a
    hearing to address the request, as it had when Diaz had
    previously sought to replace O’Brien as counsel. 2 However
    2
    Diaz contends that, in not quickly holding a hearing as it had
    when Diaz sought to replace O’Brien, the District Court was
    enforcing an unspoken “one-substitution rule.”              See
    Appellant’s Br. at 35. We are not persuaded that the Court had
    such a policy in place. It goes without saying that there is no
    numerical limit on the right to counsel. To say that, after
    having had more than one lawyer, a defendant complaining
    about counsel’s representation must automatically represent
    himself would impose an arbitrary limit on the Sixth
    Amendment. Unless a defendant forfeits the right to counsel
    due to “extremely serious misconduct” or knowingly,
    9
    undesirable the Court’s initial inaction may have been, within
    a month, the Court received information that Kalinowski was
    communicating with Diaz, and Diaz no longer sought new
    counsel. Thus, the Court’s intervention was unnecessary.
    The information the Court received made clear that
    Kalinowski was paying attention to Diaz’s requests. When, on
    March 24, 2017, Kalinowski, in a motion for continuance,
    wrote that he had had a meeting with Diaz the day before and
    all issues between them “ha[d] been resolved and … [Diaz]
    wishe[d] to continue with counsel’s representation,” App. at
    102–03, the District Court did not have any basis to question
    that statement.       Thereafter, Diaz appeared alongside
    Kalinowski at a pretrial conference on April 7 and did not raise
    any further complaints about the representation. Although
    Diaz renewed his complaints about Kalinowski in April and
    June letters to the Court, he stopped short of asking for
    counsel’s replacement. Further, Diaz continued to appear
    alongside Kalinowski throughout the trial and sentencing
    without complaint. Despite numerous opportunities to address
    the court, Diaz never again requested new counsel, nor did he
    ever complain of Kalinowski’s effectiveness at trial. From
    these facts, it appears that Kalinowski and Diaz had, indeed,
    resolved their issues and were working together effectively.
    Therefore, although ideally the District Court would have
    inquired into Diaz’s various complaints, we cannot conclude
    voluntarily, and intelligently waives that right, his Sixth
    Amendment right to effective assistance of counsel persists.
    See United States v. Leggett, 
    162 F.3d 237
    , 249–50 (3d Cir.
    1998) (citation omitted).
    10
    from this record that the Court’s failure to do so amounted to
    an abuse of discretion. 3
    B. Officer Gula’s Testimony
    Diaz next challenges the testimony of DEA Task Force
    Officer Gula. Because defense counsel did not object to this
    testimony at trial, we will reverse only for plain error. United
    States v. Jackson, 
    849 F.3d 540
    , 544 (3d Cir. 2017). Diaz
    contends that the District Court plainly erred by allowing, in
    violation of Federal Rule of Evidence 701, Gula’s testimony
    (1) drawing the legal conclusion that Diaz was a conspirator
    who bagged and distributed drugs and (2) interpreting non-
    coded conversations in which Diaz was involved.
    Federal Rule of Evidence 701 permits certain lay
    opinion testimony that “has the effect of describing something
    that the jurors could not otherwise experience for themselves”
    to offer the trier of fact a more “accurate reproduction of the
    event.” 
    Jackson, 849 F.3d at 553
    (quoting United States v.
    Fulton, 
    837 F.3d 281
    , 291 (3d Cir. 2016)). To achieve this
    purpose, Rule 701 requires that lay opinion testimony be
    (a) “rationally based on the witness’s perception,” (b) helpful,
    3
    Our conclusion that the Court did not abuse its discretion
    should not be confused with an endorsement of its approach to
    the situation. As we have noted, the District Court did not
    follow up on its order that Kalinowski respond, nor did it seek
    an explanation from Kalinowski about his lack of
    responsiveness or bring Diaz and Kalinowski into court to ask
    about the apparent breakdown in communication. Simple steps
    such as these would have been appropriate and advisable.
    11
    and (c) “not based on scientific, technical, or other specialized
    knowledge.” Fed. R. Evid. 701. The proponent of the lay
    opinion testimony bears the burden of demonstrating an
    adequate foundation. 
    Fulton, 837 F.3d at 291
    . Here, Diaz
    argues that Gula’s testimony failed to satisfy the foundation
    requirements of both 701(a) and 701(b) when he testified as to
    Diaz’s role in the conspiracy and interpreted clear
    conversations. We need not consider the 701(a) objections
    because these aspects of Gula’s testimony clearly violated
    701(b).
    i.     Conclusory Testimony
    We turn first to Gula’s testimony about Diaz’s role in
    the conspiracy. Diaz contends that, when Gula summarized
    Diaz’s role, he improperly and unhelpfully offered his opinion
    on the ultimate issue at trial: Diaz’s involvement in the
    conspiracy. We agree.
    The District Court allowed Gula to opine that Diaz
    worked as “a subordinate of Jeffrey Guzman, working at the
    direction of Jeffrey Guzman” to bag and distribute drugs. App.
    at 256. This conclusory statement was obviously unhelpful,
    and the Court should have excluded it under 701(b). The
    “purpose of the foundation requirements” of Rule 701 “is to
    ensure that such testimony does not . . . usurp the fact-finding
    function of the jury.” 
    Fulton, 837 F.3d at 291
    –92 (citation
    omitted). Therefore, the helpfulness requirement in 701(b)
    requires courts to exclude “testimony where the witness is no
    better suited than the jury to make the judgment at issue.”
    
    Jackson, 849 F.3d at 554
    (quoting 
    Fulton, 837 F.3d at 293
    ).
    Here, the jury was perfectly well suited to determine, based on
    the evidence before them, whether Diaz worked as a part of
    Guzman’s conspiracy. Indeed, that was the primary question
    12
    facing them. Gula’s comments articulated precisely the
    conclusion the government asked the jury to infer from the
    evidence presented at trial, removing the jury’s need to
    personally review the evidence. See United States v. Grinage,
    
    390 F.3d 746
    , 750 (2d Cir. 2004). Rather than offering insight
    the jury could not itself have gleaned from the evidence, Gula’s
    testimony served to provide the conclusion the government
    wanted the jury to reach.
    Such conclusory testimony undermines the goal of Rule
    701 “to exclude lay opinion testimony that ‘amounts to little
    more than choosing up sides, or that merely tells the jury what
    result to reach.’” 
    Fulton, 837 F.3d at 291
    (quoting United
    States v. Stadtmauer, 
    620 F.3d 238
    , 262 (3d Cir. 2010)). That
    is just what Gula did when he told the jury Diaz worked as
    Guzman’s subordinate, bagging and distributing drugs. By
    admitting such testimony, the District Court allowed precisely
    the sort of testimony Rule 701 is designed to exclude.
    ii.    Testimony about Non-Coded Statements
    Diaz next challenges Gula’s testimony interpreting a
    number of non-coded statements. We find this testimony quite
    problematic and have no trouble concluding that the District
    Court should have excluded it.
    We have repeatedly held that a lay witness may not
    interpret clear statements understandable to a jury without
    violating Rule 701(b)’s helpfulness requirement. 
    Jackson, 849 F.3d at 554
    ; United States v. Dicker, 
    853 F.2d 1103
    , 1109 (3d
    Cir. 1988). Certainly, lay witnesses may offer opinions about
    the meaning of recorded conversations if the witness’s
    opinions are helpful in determining a relevant fact and, to an
    13
    “uninitiated listener,” the speaker “speaks as if he were using
    code.” United States v. De Peri, 
    778 F.2d 963
    , 977 (3d Cir.
    1985). But even then, the trial court bears the responsibility of
    “vigorously polic[ing] the government’s examination” to
    ensure the witness is “not asked to interpret relatively clear
    statements.” 
    Id. at 978;
    Jackson, 849 F.3d at 553
    –54.
    Such policing is necessary because, when officers
    interpret clear, non-coded statements, they are “no better suited
    than the jury to make the judgment at issue,” and the testimony
    is therefore unhelpful. 
    Jackson, 849 F.3d at 554
    (quoting
    
    Fulton, 837 F.3d at 293
    ). In Jackson, we found lay testimony
    about a recorded call unhelpful under Rule 701(b) because the
    call contained “seemingly no mention of code words,”
    although the meaning of the call was unclear. 
    Id. Vagueness or
    lack of clarity alone does not render a conversation coded so
    as to permit lay opinion testimony about its meaning. If a jury
    could independently understand the meaning based on the
    conversation itself and other evidence in the case, Rule
    701(b)’s helpfulness requirement bars any additional lay
    witness “interpretation.”
    Here, the District Court permitted Gula to opine,
    unhelpfully, about his understanding of numerous calls the jury
    could have interpreted for themselves, sometimes actually
    misinterpreting them but giving the impression that his
    interpretation was authoritative. Gula interpreted a call from
    Diaz to Guzman in which Diaz stated, “[y]o you know this bags
    are different sizes right?” App. at 470. Gula stated that, “based
    on the investigation, my training and experience, he’s talking
    about the bags he was utilizing to bag up narcotics at the
    direction of Jeffrey Guzman, and he’s telling Guzman that the
    bags are all different sizes.” App. at 261. Gula also interpreted
    14
    a text from Louis Bracey to Diaz that read, “u got me waitin,”
    App. at 732, to mean “Louis Bracey is waiting on Gito for a
    quantity of narcotics.” App. at 287. These statements
    contained no coded terminology requiring interpretation. Gula
    simply repeated the language used in the conversations and
    then added his own conclusion that the statements referred to
    narcotics activity. We criticized this type of testimony in
    Jackson, where we noted that the translation of “you can go
    ahead and send him” to mean “it is okay now to send [a co-
    conspirator] to purchase cocaine in Dallas” presented a
    particularly egregious violation of 
    701(b). 849 F.3d at 554
    .
    Gula repeatedly offered such egregious testimony, advising the
    jury that clear statements described narcotics activity.
    The government contends that many of the
    communications did include code words. For instance, the
    government points to conversations using the term
    “barbershop,” which it argues served as a code word for a
    meeting place for drug purchases. But “barbershop” was not a
    code word. It referred to an actual barbershop—albeit one
    where the evidence showed that the co-conspirators also
    distributed drugs. Nonetheless, Gula purported to “interpret”
    a text message from Diaz, in which he said, “[c]ome on the guy
    is at the barbershop waiting for me.” App. at 472. Gula
    commented, “[t]his is significant, because during the course of
    investigation, we identified the location of Ramirez
    Barbershop, which is approximately one block away from
    Jeffrey Guzman’s residence. Jeffrey Guzman and Evans
    Santos were regularly going over to the barbershop to
    distribute narcotics to customers.” App. at 262. None of this
    testimony offers an interpretation of a coded statement.
    15
    This commentary about Diaz’s reference to the
    barbershop did not amount to proper lay opinion testimony.
    Although evidence of drug activity at Ramirez Barbershop was
    certainly relevant evidence to put before the jury, it was not
    necessary to understand the meaning of Diaz’s text message.
    Rather, linking Diaz’s statement to the evidence about Ramirez
    Barbershop, as Gula did in his testimony, constituted argument
    about the significance of Diaz’s statement. Although it is
    “perfectly appropriate for the prosecutor to argue in
    summation” that relevant evidence supports a particular
    inference from communications, a “case agent’s testimony
    may not ‘simply dress[ ] up argument as evidence.’” 
    Jackson, 849 F.3d at 554
    (alteration in original) (quoting 
    Fulton, 837 F.3d at 293
    ). The government would have been well within its
    rights to argue in summation that, based on the other evidence
    about Ramirez Barbershop, the use of “barbershop” in the co-
    conspirators’ communications referred to drug transactions at
    Ramirez Barbershop. But to present that argument by way of
    lay opinion testimony interpreting a coded statement violated
    Rule 701(b).
    Accordingly, we conclude that the trial court
    improperly admitted Gula’s conclusory testimony about Diaz’s
    role in the conspiracy as well as the testimony about his
    impressions of the communications in violation of Rule 701(b).
    iii.   Plain Error
    Nonetheless, the plain error standard of review prevents
    reversal. Under that standard, the error must be “clear under
    current law” and impact substantial rights, having prejudiced
    the defendant by affecting the trial’s outcome. United States
    v. Olano, 
    507 U.S. 725
    , 734 (1993). Moreover, we will not
    16
    reverse unless the error “seriously affect[s] the fairness,
    integrity or public reputation of judicial proceedings.” 
    Id. at 732
    (alteration in original) (internal quotation marks and
    citation omitted).
    The improper testimony did not prejudice Diaz so as to
    affect his substantial rights. Aside from Gula’s testimony, the
    prosecution introduced considerable evidence of Diaz’s
    involvement in the conspiracy, including the testimony of two
    co-defendants, the testimony of additional investigators, and
    numerous calls and text messages. Further, with respect to
    Gula’s testimony about the communications, Kalinowski
    effectively demonstrated on cross-examination that Gula had
    relied on experience unrelated to the investigation and that his
    testimony reflected only his impression of the conversations.
    These factors significantly “mitigate[ ] the likelihood that [the
    improper] testimony affected the outcome of the proceedings.”
    
    Fulton, 837 F.3d at 295
    .
    The error also did not impact the fairness, integrity, or
    public reputation of the proceedings because the prosecutor did
    not rely on any of Gula’s improper testimony in summation.
    When “urging a guilty verdict, the prosecution focused the
    jury’s attention only on the extensive admissible evidence
    supporting that result.” 
    Id. (quoting Garcia,
    413 F.3d at 217).
    Accordingly, we cannot conclude that the error “seriously
    affected the fairness, integrity, or public reputation of the
    judicial proceedings.” 
    Id. 17 C.
    The District Court’s Attribution of More than
    20 Grams of Heroin
    Diaz last challenges the District Court’s attribution of
    30 grams of heroin to him at sentencing, which caused the
    Court to increase the base offense level from 14 to 16. The
    base offense level of 16 applies when a defendant is
    responsible for at least 20 grams but less than 40 grams of
    heroin. U.S.S.G. § 2D1.1(c)(12). Therefore, as long as the
    evidence demonstrated Diaz’s responsibility for the minimum
    20 grams of heroin required for base offense level 16, any error
    in the Court’s determination that he was responsible for 30
    grams did not affect the base offense level or the resulting
    Guidelines range.
    A sentencing court must determine by a preponderance
    of the evidence that a defendant was responsible for a particular
    weight of a substance before attributing that amount to the
    defendant. United States v. Collado, 
    975 F.2d 985
    , 998 (3d
    Cir. 1992). District courts may not calculate quantity based on
    “mere speculation.” 
    Id. However, we
    permit “some degree of
    estimation” in drug conspiracy cases because “the government
    usually cannot seize and measure all the drugs that flow
    through a large drug distribution conspiracy.” Id.; United
    States v. Paulino, 
    996 F.2d 1541
    , 1545 (3d Cir. 1993).
    If a district court makes an error in its drug quantity
    determination that does not affect the base offense level or
    Guidelines range, the error is harmless. United States v.
    Woodside, 
    895 F.3d 894
    , 901 (6th Cir. 2018) (finding any error
    harmless where, absent alleged error, defendant “would still
    have been sentenced according to the same base-offense level
    under any conceivable estimate”); United States v. Alaniz, 726
    
    18 F.3d 586
    , 621 (5th Cir. 2013) (finding any error harmless
    where, absent alleged error, the undisputed drug quantity was
    “sufficient to surpass the . . . threshold for the maximum Base
    Offense Level”); see also United States v. Sykes, 
    854 F.3d 457
    ,
    462 (8th Cir. 2017) (noting that, where a change in base offense
    level would not alter the applicable Guidelines range, any error
    in drug quantity calculation would be harmless). Any error in
    attributing 30 grams of heroin to Diaz would therefore be
    harmless, so long as the evidence supported a finding of at least
    20 grams.
    We review the District Court’s factual determination
    that Diaz was responsible for at least 20 grams of heroin for
    clear error. See United States v. Metro, 
    882 F.3d 431
    , 437 (3d
    Cir. 2018). When a district court improperly bases a sentence
    on clearly erroneous facts, such a procedural error requires
    reversal. Gall v. United States, 
    552 U.S. 38
    , 51 (2007). We
    find a sentencing court’s factual findings clearly erroneous if
    they are “unsupported by substantial evidence, lack adequate
    evidentiary support in the record, are against the clear weight
    of the evidence or where the district court has misapprehended
    the weight of the evidence.” United States v. Johnson, 
    302 F.3d 139
    , 153 (3d Cir. 2002). Diaz argues that the Court
    clearly erred in concluding that Diaz was responsible for 20 or
    more grams of heroin. We disagree.
    The Court had ample basis for determining that Diaz
    was responsible for at least 20 grams of heroin. Guzman
    testified that Diaz “used to bag up” heroin for him. App. at
    327. When asked how much he would “normally pay” Diaz,
    Guzman responded that he “paid him a hundred dollars each
    10 bricks he did. So a brick is 50 bags. So each 50 times 10,
    500.” 
    Id. This testimony
    indicates that payment of $100 in
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    exchange for bagging 500 bags of heroin—approximately 15
    grams—constituted a normal transaction for Diaz’s services.
    The parties agree that at least one such transaction occurred.
    Guzman testified that a text message in which Diaz said he
    needed “a hundred” meant that Diaz wanted to “bag up” in
    exchange for $100 and remarked, “that is what I paid him for
    the drugs he bagged up.” App. at 334–35. Based on this
    evidence, Diaz undisputedly bears responsibility for bagging at
    least 500 bags, or 15 grams, of heroin.
    But Diaz bagged for Guzman more than once. Alvarez
    testified that she twice saw Diaz bagging for Guzman, and
    Guzman testified that he gave Diaz heroin twice. Although
    only the text message noted above specifically referenced
    $100, demonstrating a quantity of 500 bags, the evidence
    indicated that Guzman “normally” paid Diaz $100 for every
    500 bags, allowing the inference that a similar exchange of
    $100 for 500 bags would have occurred on the second
    occasion. App. at 327. Two like exchanges would have
    resulted in a total of 30 grams from Diaz bagging 1,000 bags
    of heroin. If, instead, Diaz bagged only half the amount of
    heroin—250 bags—the second time, that would still have
    added 7.5 grams, bringing the total to 22.5 grams. Even
    assuming Diaz bagged less than half the normal amount of
    heroin on the second occasion, however, additional evidence
    supported the conclusion that Diaz bore responsibility for more
    than 20 grams of heroin.
    Numerous text messages and calls showed that, beyond
    the two occasions noted above, Diaz repeatedly worked for or
    sought work from Guzman. Guzman testified that Diaz sought
    to bag or distribute heroin at “the barbershop”—where the
    evidence established members of the conspiracy frequently
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    distributed heroin—in at least one text message and one
    subsequent call discussed at trial. App. at 333–34, 471–74. In
    a third communication to Guzman, Diaz texted about the size
    of bags, and Guzman testified that the message concerned the
    bags Diaz used while bagging for Guzman. At least five other
    text messages further supported the inference that, on the dates
    of those messages, Diaz was completing work or seeking work
    in furtherance of the conspiracy. Even if each of these
    incidents involved only one brick—one-tenth of the amount of
    work for which Diaz was “normally” paid—the total for which
    Diaz was responsible would exceed 20 grams of heroin. The
    District Court did not clearly err in attributing at least 20 grams
    of heroin to Diaz, and to the extent any error occurred in
    attributing 30 grams specifically, such error was harmless.
    III.    Conclusion
    With respect to each of Diaz’s challenges, we find no
    error warranting reversal. First, we cannot conclude that the
    District Court abused its discretion when it did not address
    Diaz’s motion for appointment of new counsel. Next, although
    the District Court erred by failing to exclude testimony that
    violated Rule 701, the error was not plain so as to warrant
    reversal. Finally, we conclude that the Court did not clearly
    err in attributing at least 20 grams of heroin to Diaz, and any
    error in attributing 30 grams, rather than 20, was harmless.
    For the foregoing reasons, we will affirm.
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