United States v. Robert Kenneth Decker ( 2020 )


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  •            USCA11 Case: 17-15007          Date Filed: 10/27/2020       Page: 1 of 20
    [DO NOT PUBLISH]
    IN THE UNITED STATES COURT OF APPEALS
    FOR THE ELEVENTH CIRCUIT
    ________________________
    No. 17-15007
    ________________________
    D.C. Docket No. 1:16-cr-20769-DMM-1
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    versus
    ROBERT KENNETH DECKER,
    a.k.a. DigitalPossi2014,
    Defendant - Appellant.
    ________________________
    Appeal from the United States District Court
    for the Southern District of Florida
    ________________________
    (October 27, 2020)
    Before JORDAN and JILL PRYOR, Circuit Judges, and COOGLER, ∗ District
    Judge.
    COOGLER, District Judge:
    ∗ Honorable L. Scott Coogler, United States District Judge for the Northern District of Alabama,
    sitting by designation.
    USCA11 Case: 17-15007          Date Filed: 10/27/2020       Page: 2 of 20
    Robert Kenneth Decker (“Decker”) appeals his convictions, following a
    guilty plea, for conspiracy to distribute a controlled substance, in violation of 
    21 U.S.C. §§ 841
    (a)(1), 846, and conspiracy to commit money laundering, in violation
    of 
    18 U.S.C. § 1956
    (a)(1)(B)(i), (h). Decker argues for the first time on appeal that
    the district court erred by failing to ensure that a factual basis existed for his guilty
    plea as required by Federal Rule of Criminal Procedure 11(b)(3). 1
    After careful review and having had the benefit of oral argument, 2 we
    conclude that Decker waived his right to appellate review of the factual sufficiency
    of his plea by failing to object to the magistrate judge’s report and recommendation
    that the district court accept his guilty plea. We nonetheless review Decker’s Rule
    11(b)(3) claims for plain error under an exception to the waiver rule, but we
    conclude that they fail under plain-error review. Accordingly, we affirm Decker’s
    convictions and sentence.
    I.     Background
    A.      Course of Proceedings Below
    1
    Decker raised a second issue in his initial brief, arguing that the district court violated
    Fed. R. Crim. P. 32 by failing to ensure that he had reviewed the presentence investigation report
    (“PSI”) prior to sentencing. On June 12, 2018, this Court granted in part and denied in part the
    United States’ motion to dismiss this appeal, holding specifically that this second issue was
    barred by the appeal waiver in Decker’s plea agreement.
    2
    On December 5, 2019, the Government notified the Court that the docket entry included
    in the appellate index that was identified as the transcript of Decker’s sentencing hearing was not
    in fact the correct transcript but was rather a transcript of an unrelated proceeding. The
    Government moved to supplement the record with the correct sentencing hearing transcript. The
    motion is GRANTED.
    2
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    In October 2016, a grand jury in the Southern District of Florida returned an
    indictment against Decker based upon allegations of unlawful behavior conducted
    over a collection of encrypted digital networks known as the “dark web.” The
    indictment charged Decker with conspiracy to distribute a controlled substance,
    which was a mixture and substance containing a detectable amount of
    hydromorphone, hydrocodone, and oxycodone, in violation of 
    21 U.S.C. §§ 841
    (a)(1), 846 (Count 1), and conspiracy to launder the proceeds of his drug
    offenses, in violation of 
    18 U.S.C. § 1956
    (a)(1)(B)(i), (h) (Count 2).
    On December 12, 2016, Decker pled guilty to both counts of the indictment
    before a magistrate judge and pursuant to a written plea agreement. The magistrate
    judge issued a report and recommendation recommending that the district court
    accept Decker’s guilty plea as to both counts. The district court adopted the
    magistrate judge’s report and recommendation on February 14, 2017.
    On February 16, 2017, the district court sentenced Decker to 140 months’
    imprisonment, followed by a three-year supervised release term. Decker did not
    file a timely notice of appeal, but he filed a motion pursuant to 
    28 U.S.C. § 2255
    explaining that his counsel had failed to file a notice of appeal despite Decker’s
    instructions that he do so. As a result, the district court entered a new judgment of
    conviction, re-imposing the same sentence, which permitted Decker to file a timely
    notice of appeal. Decker remains incarcerated.
    3
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    B.     The Factual Proffer
    According to the agreed-to factual proffer presented at Decker’s change of
    plea hearing, the federal charges against him arose from a Drug Enforcement
    Administration (“DEA”) investigation into a narcotics vendor, known as
    “DigitalPossi2014,” who had been illegally selling narcotics online using the
    services of several dark web internet marketplaces. The factual proffer explained
    that “[d]ark [w]eb marketplace[s] allow vend[o]rs, in conspiracy with the unknown
    marketplace administrators, to distribute controlled substances anonymously online
    and launder the proceeds through a series of complex bitcoin transaction[s]
    designed to conceal the nature, source, and control of the funds.”
    The proffer explained that in order to investigate DigitalPossi2014, DEA
    agents working undercover bought hydrocodone and hydromorphone pills from
    DigitalPossi2014 online and received the purchased narcotics by U.S. Mail at
    mailboxes in the Southern District of Florida. The drugs were purchased online
    from Nucleus Market, Dream Market, and AlphaBay Market, all anonymous dark
    web internet marketplaces, using bitcoin to pay for the drugs. In the factual proffer,
    Decker admitted that DigitalPossi2014 had “conducted thousands of transactions
    on numerous Dark Web marketplaces” selling prescription opiate pills. He further
    admitted that DigitalPossi2014 had conducted 10,738 transactions on Alphabay
    Market selling opiate pills including hydrocodone, oxycodone, OxyContin,
    4
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    Percocet, hydromorphone, and morphine.
    Decker also admitted in the factual proffer that DigitalPossi2014 had placed
    an advertisement in a medical marijuana marketplace and provided his cellphone
    number. The advertisement stated, “I’m on the dark web and I sell a lot on there,”
    noting “I have nothing but great reviews.” The DEA tracked the telephone number
    listed in the advertisement to Decker’s address in Detroit, Michigan, and traced the
    packages of controlled substances they had received from DigitalPossi2014 to a
    post office box issued to Decker. Cars registered to Decker and his wife were in
    the driveway at Decker’s Detroit address, and a review of Decker’s finances
    revealed that Decker had spent over $15,000 on www.stamps.com and at the
    United States Post Office since March 2014.
    Decker’s financial records also showed that Decker had a bitcoin account
    with Coinbase, a bitcoin wallet host and exchanger, under the name
    DigitalPossi2014. The factual proffer explained that “[a] preliminary analysis of
    the bitcoin block chain revealed that the majority of Decker’s incoming bitcoin
    transactions in his Coinbase account originated from dark net markets such as
    Agora Marketplace, Nucleus Market, and Evolution Marketplace.” The
    investigation also revealed that Decker used LocalBitcoins, a bitcoin exchange
    often used by dark web members, to anonymously exchange his bitcoin drug
    proceeds for fiat currency.
    5
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    The factual proffer further noted that Decker used the name “digitally
    possible” on public social media, and his e-mail address was
    “digitalpossi2014@yahoo.com.” A search warrant executed at Decker’s Detroit
    residence revealed mail packing materials and shipping labels with the P.O. Box
    number on the return label and handwritten notes containing drug quantities. The
    agents also seized Decker’s computers and cell phones.
    C.     The Plea Colloquy
    Prior to accepting Decker’s guilty plea, the magistrate judge asked Decker a
    series of questions to ensure that Decker understood the proceedings, was not
    under the influence of any drugs, had received advice of counsel, and was
    voluntarily agreeing to plead guilty. Decker confirmed that he was not under the
    influence of any drugs, that he had received and read the indictment and had
    discussed it with his attorney, and that he was fully satisfied with the legal
    representation he had received. He also acknowledged that he had read and
    reviewed the written plea agreement with his attorney before signing it and
    understood the terms of the agreement.
    The magistrate judge further read the charges to Decker who confirmed that
    he was guilty of the charges and had no questions about them. The magistrate
    judge then asked that the factual proffer that the parties had agreed to be entered
    into the record in lieu of Decker describing the charges, and both parties agreed. At
    6
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    the conclusion of hearing, when asked whether he was guilty of the charges set out
    in the indictment, Decker again confirmed that he was guilty. Thereafter, the
    magistrate judge stated his finding that “the defendant is fully competent and
    capable of entering an informed plea; that the defendant is aware of the nature of
    the charges and the consequences of his pleas of guilty; and the pleas of guilty are
    knowing and voluntary pleas supported by an independent basis in fact containing
    all of the material elements of the offenses.”
    In the report and recommendation filed by the magistrate judge after the
    change of plea hearing, the magistrate judge advised that he had conducted the plea
    colloquy with Decker “in conformity with the requirements of Rule 11 of the
    Federal Rules of Criminal Procedure.” Among other things, the report and
    recommendation further stated that the factual proffer, made part of the record and
    executed by the Government, Decker, and his counsel, included all the essential
    elements of the offenses to which he was pleading guilty. The report and
    recommendation noted that Decker had 14 days in which to file any written
    objections to the report and recommendation with the district court and warned that
    failure to file timely objections may bar Decker from attacking on appeal the
    factual findings contained within the report and recommendation. Decker did not
    file any objections.
    II.   Legal Standards
    7
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    Decker argues for the first time on appeal that the district court failed to
    comply with Rule 11(b)(3), which requires the district court, before accepting a
    guilty plea, to determine that there is an independent factual basis for the plea.
    Decker contends that, with regard to Count 1 of the indictment, which charged a
    violation of 
    21 U.S.C. §§ 841
    (a)(1), 846, conspiracy to distribute controlled
    substances, the factual proffer failed to identify a co-conspirator, an agreement, or
    the “mixture” of narcotics that he agreed to distribute. He argues with regard to
    Count 2, which charged conspiracy to commit money laundering in violation of 
    18 U.S.C. § 1956
    (a)(1)(B)(i), (h), that the proffer not only failed to identify a co-
    conspirator, but that it also lacked support in fact for any of the elements of
    substantive money laundering. Decker thus contends that his convictions must be
    vacated, and his case remanded, to give him an opportunity to plead anew.
    Generally, where a defendant fails to raise Rule 11 violations in the district
    court, this Court reviews the district court’s findings for plain error. See United
    States v. Vonn, 
    535 U.S. 55
    , 58 (2002); United States v. Puentes-Hurtado, 
    794 F.3d 1278
    , 1285–86 (11th Cir. 2015). However, pursuant to Federal Rule of Criminal
    Procedure 59(b)(2),3 a defendant who fails to make timely objections to a
    3
    Rule 59(b)(2) states:
    Objections to Findings and Recommendations. Within 14 days after being served
    with a copy of the recommended disposition, or at some other time the court sets, a
    party may serve and file specific written objections to the proposed findings and
    8
    USCA11 Case: 17-15007           Date Filed: 10/27/2020       Page: 9 of 20
    magistrate judge’s report and recommendation within 14 days of the issuance of
    the report waives his right to appellate review, even for plain error. See also United
    States v. Garcia-Sandobal, 
    703 F.3d 1278
    , 1283 (11th Cir. 2013) (holding that the
    defendant waived his argument that the district court should not have accepted his
    guilty plea by failing to file objections to the magistrate judge’s report and
    recommendation that the district court accept his plea); United States v. Latchman,
    512 F. App’x 908, 909 (11th Cir. 2013) (per curiam) (relying upon Rule 59(b)(2)
    and Garcia-Sandobal to hold that the waiver applies to a defendant’s challenge to
    the factual basis of her guilty plea pursuant to Rule 11(b)(3)). 4
    Eleventh Circuit Rule 3-1 echoes the warning contained in Rule 59(b)(2),
    stating:
    A party failing to object to a magistrate judge’s findings or
    recommendations contained in a report and recommendation in
    accordance with the provisions of 
    28 U.S.C. § 636
    (b)(1) waives the
    right to challenge on appeal the district court’s order based on
    unobjected-to factual and legal conclusions if the party was informed
    of the time period for objecting and the consequences on appeal for
    failing to object.
    recommendations. Unless the district judge directs otherwise, the objecting party
    must promptly arrange for transcribing the record, or whatever portions of it the
    parties agree to or the magistrate judge considers sufficient. Failure to object in
    accordance with this rule waives a party’s right to review.
    4
    Unpublished opinions are not considered binding precedent but may be cited as
    persuasive authority insofar as their legal analysis warrants. Bonilla v. Baker Concrete Const.,
    Inc., 
    487 F.3d 1340
    , 1345 n.7 (11th Cir. 2007) (citing United States v. Rodriguez-Lopez, 
    363 F.3d 1134
    , 1138 n.4 (11th Cir. 2004)).
    9
    USCA11 Case: 17-15007          Date Filed: 10/27/2020      Page: 10 of 20
    11th Cir. R. 3-1. But even without a proper objection, Rule 3-1 provides that a
    “court may review on appeal for plain error if necessary in the interests of justice.”
    
    Id.
     See also Padgett v. United States, 791 F. App’x 51, 53 n.1 (11th Cir. 2019) (per
    curiam) (relying upon the waiver provision in Rule 3-1 to review unobjected-to
    claims in a 
    28 U.S.C. § 2255
     proceeding for plain error only).5
    Based on the foregoing authority, we conclude that Decker waived his right
    to appellate review of the factual sufficiency of his plea by failing to file written
    objections to the magistrate judge’s report and recommendation, which stated that
    the factual proffer contained all essential elements of the offenses charged.
    However, we believe that the instant case warrants application of the “interests of
    justice” exception found in Rule 3-1, primarily because the Government did not
    raise waiver pursuant to Rules 59(b)(2) or 3-1 in its initial brief, instead arguing
    that plain-error review applied to Decker’s claims, and only attempted to raise the
    waiver defense through the filing of a letter several days before oral argument. 6
    Therefore, we will examine Decker’s Rule 11(b)(3) claims for plain error.
    Federal Rule of Criminal Procedure 52(b) provides that “[a] plain error that
    affects substantial rights may be considered even though it was not brought to the
    5
    See note 4, supra.
    6
    New arguments are generally waived when not raised in a party’s initial brief. See KMS
    Rest. Corp. v. Wendy’s Int’l, Inc., 
    361 F.3d 1321
    , 1328 n.4 (11th Cir. 2004).
    10
    USCA11 Case: 17-15007        Date Filed: 10/27/2020    Page: 11 of 20
    [district] court’s attention.” Fed. R. Crim. P. 52(b). To prevail on plain error
    review, a defendant must show: 1) “an error that has not been intentionally
    relinquished or abandoned”; 2) that the error was “plain—that is to say, clear or
    obvious”; and 3) that the error “affected the defendant’s substantial rights.”
    Molina-Martinez v. United States, 
    136 S. Ct. 1338
    , 1343 (2016) (citing United
    States v. Olano, 
    507 U.S. 725
    , 732–34 (1993)). Once these conditions are met, we
    may “exercise [our] discretion to correct the forfeited error if the error ‘seriously
    affects the fairness, integrity or public reputation of judicial proceedings.’” 
    Id.
    (quoting Olano, 
    507 U.S. at 736
    ). “Meeting all four prongs is difficult, ‘as it should
    be.’” Puckett v. United States, 
    556 U.S. 129
    , 135 (2009) (quoting United States v.
    Dominguez Benitez, 
    542 U.S. 74
    , 83 n.9 (2004)).
    For an error to be plain, it must be clear or obvious under current law, see
    Olano, 
    507 U.S. at 734
    , “rather than subject to reasonable dispute,” Puckett, 
    556 U.S. at 135
    . “[T]here can be no plain error where there is no precedent from the
    Supreme Court or this Court directly resolving it.” United States v. Lange, 
    862 F.3d 1290
    , 1296 (11th Cir. 2017) (quoting United States v. Lejarde-Rada, 
    319 F.3d 1288
    , 1291 (11th Cir. 2003) (per curiam)). If there is not a case squarely on point,
    however, there may be plain error where a decision “appears to be particularly
    egregious, and strikes at a core principle embodied in the violated law or rule.”
    United States v. Dean, 
    487 F.3d 840
    , 847 (11th Cir. 2007).
    11
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    Whereas the standard for a plain error is high, the evidentiary threshold of
    Rule 11(b)(3) is low. A district court’s finding of a factual basis for a guilty plea
    under Rule 11(b)(3) does not require “uncontroverted evidence of guilt” but only
    “evidence from which a court could reasonably find that the defendant was guilty.”
    United States v. Rodriguez, 
    751 F.3d 1244
    , 1255 (11th Cir. 2014). See also 1A
    Charles Alan Wright & Arthur R. Miller, Federal Practice and Procedure, § 180
    (5th ed. 2020) (“The quantum of evidence needed to supply a factual basis [under
    Rule 11(b)(3)] takes less evidence than would be needed to sustain a conviction at
    trial; something closer to a rational basis is all that courts may require.”).
    As we explain below, Decker cannot show that the district court committed
    plain, i.e., “clear” or “obvious,” error in concluding that there was an independent
    factual basis for his guilty plea to Counts 1 and 2. See Olano, 
    507 U.S. at 734
    .
    Thus, we need not address the other prongs of the plain-error inquiry.
    III.   Application
    A.      Count 1
    Decker first argues that that the factual proffer failed to establish a basis for
    his guilty plea to Count 1, conspiracy to distribute a controlled substance in
    violation of 
    21 U.S.C. §§ 841
    (a)(1), 846, because the proffer did not identify any
    known conspirator or establish the existence of any unknown conspirator with
    whom he agreed to sell drugs. To obtain a conspiracy conviction, the government
    12
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    must prove an agreement between two or more persons to commit a crime. See
    United States v. Ndiaye, 
    434 F.3d 1270
    , 1294 (11th Cir. 2006). “While . . . ‘an
    individual can be convicted of conspiracy with unknown persons referred to in the
    indictment,’” a conspiracy conviction cannot be sustained when “the government
    has not proven the existence of unknown persons.” United States v. Arbane, 
    446 F.3d 1223
    , 1228 n.8 (11th Cir. 2006) (emphasis added) (quoting United States v.
    Figueroa, 
    720 F.2d 1239
    , 1244–45, 1245 n.8 (11th Cir. 1983)).
    We find no plain error in the district court’s conclusion that the factual
    proffer sufficiently established that Decker conspired with unknown dark web
    marketplace administrators to illegally distribute controlled substances. Decker
    agreed in the proffer that the Government could prove beyond a reasonable doubt
    that the user “DigitalPossi2014” repeatedly sold controlled substances on dark web
    marketplaces, which “allow[ed] vend[o]rs, in conspiracy with the unknown
    marketplace administrators, to distribute controlled substances anonymously online
    and launder the proceeds through a series of complex bitcoin transaction[s]
    designed to conceal the nature, source, and control of the funds.” He also admitted
    that the Government could prove beyond a reasonable doubt facts that would
    support a conclusion that he was the person operating the “DigitalPossi2014”
    accounts on those dark web marketplaces.
    13
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    While Decker now complains that the factual proffer did not identify any
    specific acts of the dark web marketplace administrators or communications
    between the administrators and Decker, such specificity is not required to establish
    a conspiracy. “The existence of an agreement may be proven by circumstantial
    evidence, including ‘inferences from the conduct of the alleged participants or
    from circumstantial evidence of a scheme.’” United States v. Silvestri, 
    409 F.3d 1311
    , 1328 (11th Cir. 2005) (quoting United States v. Tamargo, 
    672 F.2d 887
    , 889
    (11th Cir. 1982)). The Government may establish the defendant’s knowledge of an
    illegal agreement by showing that the defendant knew the conspiracy’s essential
    objectives. United States v. Russell, 
    703 F.2d 1243
    , 1250 (11th Cir. 1983).
    It was not irrational for the district court to have inferred from the factual
    proffer that Decker knowingly and intentionally used dark web marketplaces that
    were deliberately established by unknown administrators to promote and assist his
    illegal narcotics sales, protect his identity, and conceal the source of the payments
    he received. Like any other large-scale drug trafficker, Decker needed the
    assistance of knowledgeable distributors to make sales. Without the knowing
    assistance of the administrators of those websites named in the factual proffer,
    Decker would not have admittedly sold more than 10,000 illegal pills and received
    payment for those transactions while remaining anonymous. See United States v.
    Reeves, 
    742 F.3d 487
    , 500 (11th Cir. 2014) (“[E]fforts to conceal a conspiracy may
    14
    USCA11 Case: 17-15007       Date Filed: 10/27/2020    Page: 15 of 20
    support the inference that a defendant knew of the conspiracy and joined it while it
    was in operation.”). The factual proffer provided sufficient facts from which the
    district court could reasonably find that Decker conspired with unknown dark web
    administrators to sell drugs.
    Decker also argues that because the indictment charged that he conspired to
    sell “a mixture and substance containing a detectable amount of hydromorphone,
    hydrocodone, and oxycodone,” but the factual proffer did not specifically refer to
    any “mixture,” the factual proffer did not establish that Decker distributed the same
    mixture of compounds charged in the indictment. We disagree.
    The factual proffer reflected Decker’s admission that he sold “prescription
    opiate pills” including hydromorphone pills, hydrocodone pills, oxycodone pills,
    and pills containing other specified chemical compounds online. It correctly
    specified the quantities of hydromorphone, hydrocodone, oxycodone, and other
    controlled substances that Decker sold. From the admission that Decker sold pills
    containing these compounds, a district court could reasonably find that Decker
    conspired to distribute mixtures containing these substances. And Decker offers no
    authority or citation for the proposition that a factual proffer must specifically
    describe a “mixture” of compounds, especially when the indictment also referred
    to a “substance.” The absence of authority supporting Decker’s position prohibits
    us from finding that a plain error occurred. See Lange, 862 F.3d at 1296. Nor does
    15
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    Decker challenge the fact that he sold the drugs identified in the factual proffer.
    Under these circumstances, the district court did not plainly err in accepting the
    factual proffer’s detailed description of the controlled substances that Decker
    conspired to and did sell.
    B.      Count 2
    Decker also argues that that the factual proffer failed to establish a basis for
    his guilty plea to Count 2, conspiracy to commit money laundering in violation of
    
    18 U.S.C. § 1956
    (a)(1)(B)(i), (h), because, as he argued with regard to Count 1, the
    proffer did not identify any co-conspirator, either known or unknown, with whom
    he agreed to launder the proceeds of his drug sales. To establish a conspiracy to
    commit money laundering under 
    18 U.S.C. § 1956
    (h), the Government must show
    “(1) agreement between two or more persons to commit a money-laundering
    offense; and (2) knowing and voluntary participation in that agreement by the
    defendant.” United States v. Broughton, 
    689 F.3d 1260
    , 1280 (11th Cir. 2012).
    We find no plain error in the district court’s conclusion that there was a
    factual basis to support that Decker was guilty of conspiring with unknown dark
    web marketplace administrators to launder drug proceeds. The factual proffer
    stated that the dark web, which Decker admittedly utilized, “allow[s] vend[o]rs, in
    conspiracy with the unknown marketplace administrators, to . . . launder the
    proceeds [of drug sales] through a series of complex bitcoin transaction[s]
    16
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    designed to conceal the nature, source, and control of the funds.” The proffer also
    included an analysis of Decker’s financial records that showed that Decker had a
    bitcoin account under the username DigitalPossi2014 with Coinbase, a bitcoin
    wallet host and exchanger, and that most of his incoming bitcoin transactions
    within Coinbase originated from dark web markets such as Agora Marketplace,
    Nucleus Market, and Evolution Market. Decker also admitted that he then would
    use LocalBitcoins, a bitcoin exchange that was frequently used by dark web
    vendors, to exchange bitcoin for fiat currency. Although Decker complains that the
    proffer did not identify any specific bitcoin transaction, it may rationally be
    inferred that the administrators of these dark web marketplaces went to great
    lengths to assist Decker and others in concealing the true source of their drug
    proceeds by using bitcoin and making it impossible for law enforcement to discern
    who Decker sold drugs to and how much he received on each sale. Taken together,
    the dual efforts of Decker and the marketplace administrators to conceal the source
    of drug sale proceeds allows the reasonable conclusion that Decker engaged in a
    conspiracy with administrators to commit money laundering.
    Decker also contends that the factual proffer failed to establish any of the
    four elements of the substantive money laundering offense. To be guilty of money
    laundering, a defendant must have
    (1) knowingly conducted a “financial transaction,” (2) which he knew
    involved funds that were the proceeds of some form of unlawful
    17
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    activity, (3) where the funds involved in the financial transaction in fact
    were the proceeds of a “specified unlawful activity,” and (4) that the
    defendant engaged in the financial transaction knowing that the
    transaction was designed in whole or in part to conceal or disguise the
    nature, location, source, ownership, or control of the proceeds of such
    unlawful activity.
    United States v. Tarkoff, 
    242 F.3d 991
    , 994 (11th Cir. 2001) (citing United States
    v. Majors, 
    196 F.3d 1206
    , 1212 (11th Cir. 1999)).
    With regard to the first three elements, the proffer established that Decker
    used bitcoin, that most of his bitcoin transactions originated from dark web
    marketplaces such as Agora Marketplace, Nucleus Market, and Evolution
    Marketplace, and that his outgoing bitcoin transactions went to a peer-to-peer
    exchange often utilized by vendors to anonymously exchange drug proceeds for
    fiat currency. Further, the proffer established that DEA agents purchased
    controlled substances from Decker on Nucleus Market and other dark web
    marketplaces in exchange for bitcoin. The proffer thus connected Decker’s use of
    the dark web to his sale of drugs for bitcoin. The district court could have
    reasonably determined that Decker knew his bitcoin transactions on the dark web
    involved drug proceeds.
    Decker also argues that the use of bitcoin does not suffice to demonstrate
    concealment, the fourth element of money laundering. While one’s use of bitcoin
    as a monetary instrument, alone, does not ipso facto mean that one engaged in a
    financial transaction related to unlawful activities, the factual proffer here
    18
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    established not only that Decker used bitcoin but also that he used bitcoin to sell
    drugs to undercover DEA agents, that he sold drugs on marketplaces that vendors
    frequently use to launder drug proceeds, and that his outgoing bitcoin transactions
    were sent to a peer-to-peer exchange frequently used to conceal the origin of the
    bitcoin funds by trading anonymously for fiat currency.7
    Decker’s final argument is that the factual proffer failed to show any
    financial transaction separate and apart from the underlying drug sales. See Majors,
    
    196 F.3d at 1212
     (“A violation of the concealment provision must ‘follow in time’
    the completion of the underlying transaction as an activity designed to conceal or
    disguise the origins of the proceeds.” (quoting United States v. Dimeck, 
    24 F.3d 1239
    , 1246 (10th Cir. 1994)). We disagree with Decker’s argument. The proffer
    established distinct transactions to conceal illicit drug proceeds. The proffer
    described how the dark web marketplaces not only help vendors distribute drugs
    but also help them “launder the proceeds through a series of complex bitcoin
    transaction[s] designed to conceal the nature, source, and control of the funds.”
    The proffer further established that Decker sent outgoing bitcoin transactions to
    LocalBitcoins, a “peer-to-peer exchange often utilized by dark web vend[o]rs to
    anonymously exchange bitcoins drug proceeds for fiat currency.” Thus, the district
    7
    Relatedly, Decker argues, almost in passing, that “the money laundering statute does not
    encompass financial transactions in bitcoins.” As Decker admits, no court has adopted this
    argument. So even assuming there was error, it was not plain.
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    USCA11 Case: 17-15007     Date Filed: 10/27/2020   Page: 20 of 20
    court could have reasonably concluded that Decker engaged in a series of
    transactions in which he first anonymously exchanged drugs for bitcoin, then
    anonymously exchanged bitcoin for fiat currency to conceal the origin of the funds.
    III.   Conclusion
    Because Decker failed to object to the magistrate judge’s report and
    recommendation, he waived the ability to challenge the district court’s acceptance
    of that recommendation, and there is no basis to find plain error for purposes of
    Rule 3-1’s “interests of justice” exception. Accordingly, the judgment of the
    district court is
    AFFIRMED.
    20