United States v. Christopher Waguespack , 935 F.3d 322 ( 2019 )


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  •      Case: 18-30813    Document: 00515077689       Page: 1   Date Filed: 08/15/2019
    IN THE UNITED STATES COURT OF APPEALS
    FOR THE FIFTH CIRCUIT
    United States Court of Appeals
    Fifth Circuit
    FILED
    No. 18-30813                    August 15, 2019
    Lyle W. Cayce
    UNITED STATES OF AMERICA,                                                 Clerk
    Plaintiff - Appellee
    v.
    CHRISTOPHER G. WAGUESPACK,
    Defendant - Appellant
    Appeal from the United States District Court
    for the Middle District of Louisiana
    Before HAYNES, GRAVES, and DUNCAN, Circuit Judges.
    JAMES E. GRAVES, Circuit Judge:
    A jury convicted Christopher G. Waguespack of knowingly distributing
    and possessing child pornography, in violation of 18 U.S.C. §§ 2252A(a)(2) and
    2252A(a)(5)(B).    The district court sentenced Waguespack to 180 months’
    imprisonment on each count to run concurrently, followed by 10 years of
    supervised release. He now challenges his conviction and sentence on six
    grounds. We AFFIRM.
    I.    BACKGROUND
    A.    Investigation
    In March 2015, Investigator Louis Ratcliff from the Louisiana Attorney
    General’s Office conducted an undercover investigation of peer-to-peer
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    No. 18-30813
    networks 1 for child pornography.            Ratcliff used Torrential Downpour 2 to
    download over 400 images of child pornography from an IP Address in Baton
    Rouge, Louisiana. On May 5, 2015, he opened a file on his March investigation
    and authored a report on his investigation results. On June 13, 2015, Ratcliff
    conducted another investigation and downloaded over 200 images of child
    pornography from an IP Address in Baton Rouge, Louisiana.                            Ratcliff
    subpoenaed Cox Communications to provide the IP Addresses for the
    downloads that occurred on March 29–30, 2015, and June 13, 2015. Cox
    Communications informed Ratcliff that the IP Addresses belonged to
    Waguespack’s father, Larry Waguespack, with whom Waguespack lived.
    On September 24, 2015, officers executed a search warrant at
    Waguespack’s residence. The officers seized a computer from Waguespack’s
    bedroom.      The computer contained software actively searching for and
    downloading files with file names indicative of child pornography. After a
    forensic examination, the computer was found to have encrypted space and
    1 Peer-to-peer file sharing is a means of Internet communication utilizing
    software that lets users exchange digital files through a network of linked
    computers. Users access peer-to-peer networks by downloading the peer-to-
    peer software from the Internet; this software is used exclusively for sharing
    digital files. Generally, after a user downloads or installs the software, either
    the user selects a folder to store downloaded files or the installation program
    designates the shared folder as the default folder into which files are
    automatically downloaded. Files that are downloaded into the shared folder
    (or downloaded into a separate folder but later placed into the shared folder)
    are available to anyone on the peer-to-peer network for downloading. Someone
    interested in sharing child pornography with other peer-to-peer network users
    need only leave or place such files in his shared folder, which other users may
    then access by searching for relevant terms and phrases.
    United States v. Richardson, 
    713 F.3d 232
    , 233–34 (5th Cir. 2013).
    2 At trial, Agent David Ferris testified that Torrential Downpour is a BitTorrent
    program used by law enforcement to investigate peer-to-peer networks. It targets IP
    addresses that have recently shared child pornography and creates an activity log of the files
    involved.
    2
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    anti-forensic software, 3 CCleaner & Eraser, installed. There were file paths
    with names indicative of child pornography that led to an “E-drive,” but
    examiners were unable to locate an “E-drive” in the unencrypted space of the
    computer. The examiners were also unable to find any user-accessible child
    pornography on the computer.           However, the examiners found over 2,800
    images and four videos of child pornography in deleted thumbnail cache 4 in a
    deleted zip file in an unallocated space of the computer. The file names in the
    unallocated space were not indicative of child pornography.
    B.      Indictment & Superseding Indictment
    Relevant here, the grand jury returned an indictment charging
    Waguespack with knowingly distributing child pornography on May 5, 2015
    and June 13, 2015, and knowingly possessing child pornography on September
    24, 2015.     In a probable cause affidavit to support the search warrant
    application, Ratcliff     stated that at least one child pornography offense
    occurred on May 5, 2015. In fact, May 5, 2015, was the date that Ratcliff
    authored his investigation report and not the date that any of the offenses
    occurred.
    Subsequently, the Government obtained a Superseding Indictment. The
    Superseding Indictment mirrored the original indictment except the date of
    the May 5, 2015 offense was changed to between March 29, 2015 and March
    30, 2015. Waguespack pleaded not guilty to the counts in the Superseding
    Indictment.
    3  The Government’s expert testified that anti-forensic software is used to cover a
    computer user’s tracks.
    4 Cache files are files that a web browser automatically creates that may have been
    seen on the internet that are stored in hidden or inaccessible space.
    3
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    C.     Pre-Trial
    Waguespack filed several pre-trial motions, including a motion for the
    production of the transcripts of the grand jury proceedings and a motion to
    suppress. The district court denied both motions.
    In the motion for production, Waguespack argued that the date
    discrepancy between March 29–30 and May 5 showed that Ratcliff possibly lied
    to the Grand Jury. 5 He argued that the Government’s knowing use of false
    testimony entitled him to the transcripts. The district court denied the motion
    and found, inter alia, that Waguespack failed to show a particularized need for
    the transcripts. The court found that Waguespack failed to present evidence
    that Ratcliff was lying, and not simply making an error. The court further
    found that even if Ratcliff lied, the Superseding Indictment with the correct
    dates remedied any injustice.
    In the motion to suppress, Waguespack argued that the evidence
    obtained from the search should have been suppressed because the search
    warrant application contained a material misstatement, violating Franks v.
    Delaware, 
    438 U.S. 154
    (1978), as May 5 was listed instead of March 29–30.
    He argued that no judge would have found probable cause without the
    misrepresented dates. After a hearing, the district court denied the motion
    and found that Waguespack failed to prove that Ratcliff made the statements
    “knowingly and intentionally, or with reckless disregard for the truth.” The
    Court also found that even if Ratcliff knowingly lied about the dates and the
    May 5, 2015 date was omitted, there was still sufficient information to support
    probable cause.
    5  March 29–30 is the date that Ratcliff provided to support the subpoena to Cox
    Communications. May 5 is the date that Ratcliff used in his affidavit of probable cause to
    support the search warrant and the date that was listed in the original indictment.
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    D.    Trial
    On October 16, 2017, the jury trial began. Ratcliff was not a witness.
    The Government introduced Ratcliff’s download logs through Agent David
    Ferris, another investigator in the Louisiana Attorney General’s Office. Agent
    Ferris was qualified as an expert in the field of online exploitation
    investigations and peer-to-peer file sharing.      Waguespack objected to the
    introduction of the exhibits related to Ratcliff’s reports. He claimed lack of
    foundation and inadmissible hearsay. The objections were overruled.
    The   Government      also   called   Waguespack’s    parents    to   testify.
    Waguespack’s parents testified as to their knowledge of computers.             His
    mother testified that Waguespack’s father, Larry, “tinker[ed]” with computers,
    but that Waguespack did not, and “[Waguespack] wasn’t really into fixing
    other people’s computers or anything like that . . . .” She also testified that
    Waguespack is “knowledgeable [about computers] . . . he knows how to use
    them and he knows more than [she knows].”
    Waguespack’s father, Larry, testified that Waguespack was the only
    person that used the computer in Waguespack’s room. Larry also testified that
    he was knowledgeable of CCleaner as software “to get rid of . . . history folders,
    that kind of stuff and e-mail junk” and understood it as “something common .
    . . to clean [the computer] to keep it from getting viruses and stuff.” He learned
    about CCleaner from the internet and from Waguespack. He testified that he
    and Waguespack discussed CCleaner years ago because Larry was getting
    viruses on his computer.     Larry also testified that he was knowledgeable
    enough about computers that he could build one from scratch. He had not
    heard of Eraser, had minimal knowledge of encryption, and had only heard of
    BitTorrent from the investigation.
    5
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    After the Government rested, Waguespack moved for judgment of
    acquittal under Federal Rule of Criminal Procedure 29.         The motion was
    denied.
    The parties then presented their closing arguments.         Waguespack’s
    counsel stated the following in his closing:
    Ladies and Gentlemen, where is Louis Ratcliff? You heard from
    seven witnesses at this trial, and all but one testified about Louis
    Ratcliff. And the guy that didn’t was the Cox Communications guy
    . . . . Every single piece of evidence in this case, came from Louis
    Ratcliff. The Government has the burden of proof in this case and
    every case where they’re charging someone with a criminal offense,
    and they have to prove their case beyond all reasonable doubt, and
    yet the government did not call Louis Ratcliff as a witness.
    ***
    This entire case, every single piece of evidence that you have to
    rely on was touched by Louis Ratcliff. Every single thing the
    government introduced to try to prove their case requires that you
    trust Louis Ratcliff, not just trust him, ladies and gentlemen, you
    have to trust him beyond a reasonable doubt because he’s the
    source of the case, but the government didn’t trust him enough to
    call him as a witness. They didn’t call Louis Ratcliff to tell us why
    his images say March 29th and 30th, but every report says May
    5th and his sworn affidavits say May 5th. They didn’t call Louis
    Ratcliff to tell you that if he received those images in March, why
    did he wait until May 13th to put them in the evidence locker?
    ***
    Why [sic] are all of the videos and images that Mr. Ratcliff
    supposedly downloaded, why are none of them on [Waguespack]’s
    computer when they show up to do the search? Louis Ratcliff
    didn’t come and answer any of those questions because there’s no
    explanation. There is no answer for those questions.
    The Government stated the following in its rebuttal:
    The only person that brought up Mr. Ratcliff here today was
    [Waguespack’s counsel]. What I would simply say to this point,
    that if [Waguespack’s counsel] thought that Louis Ratcliff was
    going to help his side of this case, he has the same subpoena power
    as the United States government to demand that witnesses be
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    here. And I’m sure if Mr. Ratcliff was going to be that helpful,
    [Waguespack’s counsel] would have had him in this courtroom
    talking to you, not just suggesting that it may have been
    something helpful.
    The jury found Waguespack guilty of knowingly distributing and
    possessing child pornography, in violation of 18 U.S.C. §§ 2252A(a)(2) and
    2252A(a)(5)(B). The jury, responding to a special verdict form, also found that
    Waguespack possessed child pornography that involved prepubescent minors.
    E.    Sentencing
    The Presentence Investigation Report (“PSR”) recommended, inter alia,
    a two-level obstruction of justice enhancement under U.S.S.G. § 3C1.1 because
    there was anti-forensic software installed on Waguespack’s computer.
    Waguespack objected to the enhancement and argued that the enhancement
    did not apply because he never took any action to delete or conceal evidence
    after he learned of the investigation. The district court overruled the objection.
    The PSR calculated Waguespack’s offense level as 39, inclusive of the
    enhancement.     Based on Waguespack’s offense level and criminal history
    category of I, his Guidelines’ range was 262 to 327 months. The court granted
    Waguespack a downward variance and sentenced him below the Guidelines to
    180 months’ imprisonment on each count to run concurrently, followed by 10
    years of supervised release.
    Waguespack now timely appeals his conviction and sentence.
    II.    DISCUSSION
    A.    Waguespack’s Conviction Is Proper.
    Waguespack appeals his conviction on four grounds. He argues that: (1)
    the Government failed to prove beyond a reasonable doubt that Waguespack
    “knowingly” distributed and possessed child pornography; (2) the Government
    violated Waguespack’s Sixth Amendment Confrontation Clause right by
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    failing to call Ratcliff as a witness; (3) the Government made improper
    comments in its rebuttal; and (4) the Government committed a Brady violation
    by failing to provide a copy of the grand jury transcripts to Waguespack. We
    perceive no reversible error.
    1.    There was sufficient evidence to convict Waguespack
    of knowingly distributing and possessing child
    pornography.
    We review Waguespack’s claim that there was insufficient evidence to
    support the jury’s verdict de novo. United States v. Hoffman, 
    901 F.3d 523
    , 541
    (5th Cir. 2018), as revised (Aug. 28, 2018), cert. denied, No. 18-1049, 
    2019 WL 536773
    (U.S. May 20, 2019).        “We weigh the evidence ‘in a light most
    deferential’ to the jury verdict and give the party that convinced the jury the
    benefit of all reasonable inferences.” 
    Id. (quoting United
    States v. Lucio, 
    428 F.3d 519
    , 522 (5th Cir. 2005)).
    “We must affirm the verdict unless no rational juror could have found
    guilt beyond a reasonable doubt.” 
    Hoffman, 901 F.3d at 541
    (quotation
    omitted). However, “a verdict may not rest on mere suspicion, speculation, or
    conjecture, or on an overly attenuated piling of inference on inference.” United
    States v. Moreland, 
    665 F.3d 137
    , 149 (5th Cir. 2011) (quotation omitted). And,
    this court will not “credit inferences within the realm of possibility when those
    inferences are unreasonable.” 
    Id. (quotation omitted).
    Accordingly, we will
    overturn a guilty verdict “where the government has done nothing more than
    pile inference upon inference to prove guilt.” 
    Id. (quotation omitted).
                      a.    “Knowing” Distribution
    Waguespack concedes that “[p]lacing content in a shared folder on a
    peer-to-peer program amounts to distribution.” However, he argues that there
    was insufficient evidence to prove that he had the requisite knowledge of the
    distribution because, inter alia,: (1) there was no evidence that the default
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    settings were modified to show he had knowledge of the automatic file-sharing
    of the software; and (2) there was no evidence that he was on his computer or
    at home on March 29–30 to show that he had knowledge that the files were
    being transferred. He further argues that the Government even failed to
    provide evidence that any distribution or file sharing occurred on the relevant
    dates.
    Under 18 U.S.C. § 2252A(a)(2), it is unlawful for a person to knowingly
    distribute child pornography in or affecting interstate or foreign commerce by
    any means. Downloading child pornography “from a peer-to-peer computer
    network and storing [it] in a shared folder accessible to other users on the
    network” is prohibited under the statute, but “the Government must prove
    beyond a reasonable doubt that the defendant engaged in such distribution
    ‘knowingly.’” United States v. Romero-Medrano, 
    899 F.3d 356
    , 360 (5th Cir.
    2018) (citing United States v. Richardson, 
    713 F.3d 232
    , 234, 236 (5th Cir.
    2013)).
    Weighing the evidence in the light most deferential to the jury verdict
    and giving the Government the benefit of all reasonable inferences, there was
    sufficient evidence for a rational jury to find Waguespack guilty beyond a
    reasonable doubt of knowingly distributing child pornography. At trial, the
    Government presented evidence that:
    • A peer-to-peer file sharing software was installed on the computer
    in Waguespack’s room.
    • Waguespack was the sole user of the computer in his room.
    • The peer-to-peer file sharing software notified users when files
    were being uploaded or downloaded.
    • The software’s default settings for the shared folder on the seized
    computer were changed.
    • Waguespack had advanced technological proficiency.
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    • Agent Ratcliff downloaded child pornography using the peer-to-
    peer file sharing software from an IP Address in Waguespack’s
    home.
    • A user on the computer previously searched for, viewed,
    downloaded, and transferred child pornography using the file
    sharing software, including transferring child pornography after
    child pornography was distributed to Agent Ratcliff in March 2015.
    • The computer seized from Waguespack’s room contained over 2800
    images of child pornography.
    Taken together, the evidence is probative of Waguespack’s knowledge
    and is sufficient to demonstrate that Waguespack “knowingly” distributed
    child pornography. The evidence was sufficient to support a jury finding of
    guilt beyond a reasonable doubt.
    Waguespack relies on extra-circuit precedent, United States v. Carroll,
    
    886 F.3d 1347
    (11th Cir. 2018) to support his insufficiency argument.
    However, Carroll is distinguishable.
    In Carroll, the Eleventh Circuit reversed a distribution conviction after
    finding that the Government failed to prove that the defendant was aware that
    the contents of his shared folder automatically distributed to the peer-to-peer
    
    network. 886 F.3d at 1353
    –54. The defendant argued that the Government
    “failed to present any evidence that he knew he was sharing child pornography
    files when they were automatically placed in a shared folder, and that he [could
    not] be held liable for knowing distribution without some showing that he
    consciously allowed others to access those files.” 
    Id. at 1353.
    The court agreed,
    finding that there was nothing in the record to indicate that the defendant was
    aware that the contents of his shared folder automatically distributed to the
    peer-to-peer network. 
    Id. According to
    the court, “the government failed to
    put on any evidence that [the peer-to-peer network], by design, would have
    10
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    required [the defendant] to authorize file sharing or in any way recognize that
    his downloaded files were being shared.” 
    Id. at 1354.
    The court noted that the
    design of each network may bear on the issue of knowledge in different ways.
    
    Id. Most detrimental
    to Waguespack’s argument that he lacked the requisite
    knowledge is the evidence that, by design, the software notified the user that
    files were being shared with others and that he altered the default settings of
    the software. Both are indicia of knowledge. Waguespack fails to meet his
    burden that “no rational juror could have found guilt beyond a reasonable
    doubt.” 
    Hoffman, 901 F.3d at 541
    (quotation omitted).
    b.     “Knowing” Possession
    Waguespack argues that the Government failed to prove beyond a
    reasonable doubt that he “knowingly” possessed child pornography on
    September 24, 2015, because the child pornography found on his computer was
    either cached files or deleted cached files. In addition, the child pornography
    files on his computer were located in an inaccessible portion of his hard drive.
    Under 18 U.S.C. § 2252A(a)(5)(B), it is unlawful for a person to
    knowingly possess child pornography in or affecting interstate or foreign
    commerce by any means.         To obtain a conviction under the statute, the
    Government must prove, inter alia, that a defendant “knowingly” possessed
    child pornography. United States v. Terrell, 
    700 F.3d 755
    , 764 (5th Cir. 2012)
    (per curiam). The possession may be actual or constructive. United States v.
    Smith, 
    739 F.3d 843
    , 846 (5th Cir. 2014).
    “When illegal files are recovered from shared computers, courts permit
    an inference of constructive possession where the files’ nature and location are
    such that [the] computer’s owner must be aware of them.” United States v.
    Smith, 
    739 F.3d 843
    , 847 (5th Cir. 2014). “Such an inference, however, must
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    be supported by evidence that ‘the defendant had knowledge of and access to’
    the files.” 
    Id. (quoting Moreland,
    665 F.3d at 150).
    Weighing the evidence in the light most deferential to the jury verdict
    and giving the Government the benefit of all reasonable inferences, there was
    sufficient evidence for a rational jury to find beyond a reasonable doubt that
    Waguespack knowingly possessed child pornography.             The Government
    presented evidence that there were over 2800 child pornography images on the
    computer seized from Waguespack’s room, the person using the seized
    computer was well-educated in computer usage, Waguespack was the sole user
    of the computer, anti-forensic and encryption software were discovered on the
    computer, child pornography was transferred to Agent Ratcliff from an IP
    Address at Waguespack’s home, and path files with names indicative of child
    pornography were stored on the computer. Together, this evidence is probative
    of whether Waguespack had the requisite knowledge and ability to access the
    files and exercise dominion or control over them. Cf. 
    Moreland, 665 F.3d at 148
    . Accordingly, Waguespack fails to meet his burden that “no rational juror
    could have found guilt beyond a reasonable doubt.” 
    Hoffman, 901 F.3d at 541
    (quotation omitted).
    2.    The district court did not clearly or obviously violate
    Waguespack’s Confrontation Clause rights.
    Waguespack argues that his rights under the Confrontation Clause were
    violated when the district court admitted child pornography images
    downloaded by Ratcliff and Ratcliff’s accompanying Torrential Downpour logs.
    According to Waguespack, the Government’s failure to call Ratcliff in its case-
    in-chief violated his right to confront the witness against him.             The
    Government argues that the images and logs are machine-generated and are
    not statements of a person.
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    The Confrontation Clause of the Sixth Amendment provides that “[i]n all
    criminal prosecutions, the accused shall enjoy the right . . . to be confronted
    with the witnesses against him.” U.S. Const. amend. VI. “The Confrontation
    Clause bars the admission of ‘testimonial statements of a witness who did not
    appear at trial unless he was unavailable to testify, and the defendant had [ ]
    a prior opportunity for cross-examination.’” United States v. Kizzee, 
    877 F.3d 650
    , 656 (5th Cir. 2017) (quoting Crawford v. Washington, 
    541 U.S. 36
    , 53–54,
    (2004)). “[A] statement is testimonial if its primary purpose . . . is to establish
    or prove past events potentially relevant to later criminal prosecution.” 
    Id. (quotation omitted).
           Generally, this court reviews alleged Confrontation Clause violations de
    novo. United States v. Ayelotan, 
    917 F.3d 394
    , 400 (5th Cir. 2019), as revised
    (Mar. 4, 2019). However, where, as here, the issue was not raised at trial, this
    court reviews the issue for plain error. 6 United States v. Martinez-Rios, 
    595 F.3d 581
    , 584 (5th Cir. 2010). “To prevail, [Waguespack] must demonstrate
    that[:] (1) the district court erred, (2) the error was plain, (3) the plain error
    affected his substantial rights, and (4) allowing the plain error to stand would
    ‘seriously affect the fairness, integrity, or public reputation of judicial
    proceedings.’” United States v. Bree, 
    927 F.3d 856
    , 859 (5th Cir. 2019) (quoting
    Puckett v. United States, 
    556 U.S. 129
    , 135 (2009)).
    Waguespack relies on Bullcoming v. New Mexico, 
    564 U.S. 647
    (2011), to
    support his argument that his rights were violated.                  In Bullcoming, the
    6 Waguespack conceded in his reply brief that he failed to raise a Confrontation Clause
    objection at trial. However, at oral argument, Waguespack’s counsel “walk[ed] back” the
    concession and argued that the court should review the issue de novo because trial counsel
    preserved the issue. Oral Argument at 1:20–2:20. Counsel’s citation to the record does not
    support finding that trial counsel preserved the issue or that the “objection was specific
    enough to allow the trial court to take testimony, receive argument, or otherwise explore the
    issue raised.” United States v. Burton, 
    126 F.3d 666
    , 673 (5th Cir. 1997). Accordingly, we
    exercise plain error review.
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    “question presented [was] whether the Confrontation Clause permits the
    prosecution to introduce a forensic laboratory report containing a testimonial
    certification—made for the purpose of proving a particular fact—through the
    in-court testimony of a scientist who did not sign the certification or perform
    or observe the test reported in the certification.” 
    Id. at 652.
    The district court
    admitted a forensic report into evidence certifying a defendant’s blood alcohol
    level where the defendant had been charged with driving under the influence.
    The Government did not call the analyst who certified the report. Instead, the
    Government called another analyst who was familiar with the laboratory’s
    testing procedures. The Court held that “surrogate testimony of that order
    does not meet the constitutional requirement. The accused’s right is to be
    confronted with the analyst who made the certification, unless that analyst is
    unavailable at trial, and the accused had an opportunity, pretrial, to cross-
    examine that particular scientist.” 
    Id. However, as
    Justice Sotomayor noted
    in her concurrence:
    [Bullcoming] is not a case in which the State introduced only
    machine-generated results, such as a printout from a gas
    chromatograph. The State [] introduced [the original analyst’s]
    statements, which included his transcription of a blood alcohol
    concentration, apparently copied from a gas chromatograph
    printout, along with other statements about the procedures used
    in handling the blood sample . . . Thus, [the Court did] not decide
    whether . . . a State could introduce (assuming an adequate chain
    of custody foundation) raw data generated by a machine in
    conjunction with the testimony of an expert 
    witness. 564 U.S. at 673
    –74 (Sotomayor, J., concurring).
    In United States v. Ballesteros, this court rejected the defendant’s
    argument that the district court clearly or obviously violated his right under
    the Confrontation Clause by admitting into evidence a report detailing his
    movements from GPS tracking. 751 F. App’x 579, 580 (5th Cir. 2019) (mem.),
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    cert. denied, (U.S. Jun. 10, 2019) (No. 18-9205). We concluded that because the
    defendant did not cite, and we had not found, “any decision by this court
    holding that the output of a computer program, such as a GPS report, amounts
    to a hearsay ‘statement’ under the Sixth Amendment,” the defendant failed to
    meet his burden. 
    Id. Similarly, here,
    Waguespack fails to meet his burden of establishing that
    the district court plainly erred in admitting the downloaded materials.
    Waguespack has not cited, and we have not found any case to support
    Waguespack’s position that the machine-generated materials are statements
    of a witness or trigger the Confrontation Clause. Accordingly, Waguespack’s
    argument fails.
    3.     The    Government’s       rebuttal    remarks      were     not
    improper.
    Waguespack argues that the Government made improper comments
    during its rebuttal by referencing Ratcliff’s absence. Because Waguespack
    timely objected to this issue, we review for abuse of discretion. United States
    v. Stephens, 
    571 F.3d 401
    , 407 (5th Cir. 2009).
    “Improper prosecutorial comments constitute reversible error only
    where the defendant’s right to a fair trial is substantially affected.” 
    Id. at 407–
    408 (quotation omitted). “This court applies a two-step inquiry in analyzing
    claims of prosecutorial misconduct:” (1) whether the Government made
    improper remarks; and (2) whether the improper remarks prejudiced the
    defendant. 
    Id. at 408.
          “A prosecutor is prohibited from commenting directly or indirectly on a
    defendant’s failure to testify or produce evidence.” 
    Romero-Medrano, 899 F.3d at 361
    (quotation omitted). “A prosecutor’s . . . remarks constitute a comment
    on a defendant’s silence in violation of the Fifth Amendment if the manifest
    intent was to comment on a defendant’s silence, or if the character of the
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    No. 18-30813
    remark was such that the jury would naturally and necessarily construe the
    remark to be a comment on a defendant’s silence.” 
    Id. at 392
    (quotation
    omitted). “[T]he comments complained of must be viewed within the context
    of the trial in which they are made.” 
    Id. (quotation omitted).
          In Stephens, we found that the Government’s comment that both sides
    could have subpoenaed a witness was a response to the defendant’s closing
    argument regarding a witness’s availability and was not an attempt to shift
    the burden of proof. 
    7 571 F.3d at 408
    .       We also found that even if the
    Government’s comment was improper, it was not sufficiently prejudicial to
    warrant reversal because the district court provided a curative instruction and
    there was ample evidence at trial. 
    Id. Here, viewed
    in context, the Government’s remarks were not improper.
    The jury would have understood the comments to be a response to the
    defendant’s closing argument and not an attempt to shift the burden of proof.
    And, even if the remarks were improper, the jury instructions relating to the
    7   The exchange during the closing argument in Stephens’ trial was as follows:
    Defense counsel: The guns. I suggested to you yesterday that they could have
    been bought on-line. And who could they have been bought by? Daniel Lee
    Garrett. We don’t know much about him. We know very little about him. The
    Government could have brought him into court. The Government could have
    subpoenaed him. They could have found him. They could have brought you
    this missing witness. We know very little about him.
    Government: I’m going to object, Your Honor.
    The Court: What’s your objection?
    Government: Both sides could have done that with subpoenas.
    Defense counsel: Of course both sides could have done it. But the point is it’s
    the Government’s burden to prove its case, and Mr. Costa knows that.
    The Court: Okay. Go on. Continue.
    
    Id. at 407
    n.8.
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    Government’s burden were curative. See 
    Stephens, 571 F.3d at 408
    . Further,
    Waguespack fails to demonstrate that the remarks were sufficiently
    prejudicial to warrant reversal because there was ample evidence at trial to
    support the jury’s verdict.
    4.    The Government did not violate Waguespack’s Brady
    rights by not disclosing the grand jury transcripts.
    Waguespack argues that the district court erred in denying his motion
    to compel the production of the grand jury transcripts.            Specifically,
    Waguespack argues that the date change from the first indictment to the
    superseding indictment triggered the Government’s Brady obligations, and he
    was entitled to receive a copy of the transcripts. According to Waguespack,
    “[the] witness statements used in obtaining an indictment for the wrong date
    should have been available to [him] to determine what other defects may have
    existed in the Government’s case.”
    “To establish a Brady violation, a defendant must show: (1) the evidence
    at issue was favorable to the accused, either because it was exculpatory or
    impeaching; (2) the evidence was suppressed by the prosecution; and (3) the
    evidence was material.” United States v. Cessa, 
    872 F.3d 267
    , 271 (5th Cir.
    2017) (quotation omitted). “Evidence is material if there is a reasonable
    probability that, had the evidence been disclosed to the defense, the result of
    the proceeding would have been different.” 
    Id. (quotation omitted).
             “A
    reasonable probability of a different result is one in which the suppressed
    evidence undermines confidence in the outcome of the trial.” 
    Id. (quotation omitted).
          Waguespack has not shown that the grand jury transcripts were
    material. He provides no support to demonstrate “a reasonable probability
    that, had the [transcripts] been disclosed to the defense, the result of the
    proceeding would have been different,” and that the nondisclosure of the grand
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    jury transcripts undermined confidence in the outcome of the trial. 
    Cessa, 872 F.3d at 271
    . He simply asks for them to determine “what other defects may
    have existed in the Government’s case.” Accordingly, Waguespack’s challenge
    as a Brady violation fails.
    B.    Waguespack’s Sentence Is Reasonable.
    Waguespack appeals his sentence on two grounds. He argues that: (1)
    the district court improperly applied the obstruction of justice sentencing
    enhancement; and (2) his sentence is substantively unreasonable. We find no
    reversible error.
    1.      Waguespack’s sentence is procedurally reasonable.
    Waguespack argues that his sentence is procedurally unreasonable
    because the district court erroneously applied an obstruction of justice
    sentencing enhancement.
    A district court may apply a two-level sentencing enhancement under
    U.S.S.G. § 3C1.1 if:
    (1) the defendant willfully obstructed or impeded, or attempted to
    obstruct or impede, the administration of justice with respect to
    the investigation, prosecution, or sentencing of the instant offense
    of conviction, and (2) the obstructive conduct related to (A) the
    defendant’s offense of conviction and any relevant conduct; or (B)
    a closely related offense . . . .
    U.S.S.G. § 3C1.1. “Obstructive conduct that occurred prior to the start of the
    investigation of the instant offense of conviction may be covered by this
    guideline if the conduct was purposefully calculated, and likely, to thwart the
    investigation or prosecution of the offense of conviction.” 
    Id. at Cmt.
    1.
    “A finding of obstruction of justice is a factual finding that is reviewed
    for clear error.” United States v. Zamora-Salazar, 
    860 F.3d 826
    , 836 (5th Cir.),
    cert. denied, 
    138 S. Ct. 413
    (2017). “A factual finding is not clearly erroneous
    if it is plausible in light of the record as a whole.” 
    Id. (quotation omitted).
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    The district court applied the obstruction of justice sentencing
    enhancement after finding that Waguespack’s conduct was “purposefully
    calculated and thwarted the investigation or prosecution of the offense of
    conviction.” The court found that, inter alia, the seized computer was actively
    searching for and downloading files with file names indicative of child
    pornography when law enforcement executed the search warrant, the
    computer’s deleted file space contained file paths and file names indicative of
    child pornography, anti-forensic and encryption software were installed on the
    computer, and the anti-forensic software had been programmed with a task
    list of file paths with names indicative of child pornography.
    Waguespack argues that the district court erred in applying the
    enhancement because “there was no evidence that [he] engaged in any conduct
    during the Government’s investigation of his activities or even that he was
    aware that an investigation was about to commence.” However, based on the
    plain language of the statutory commentary, the enhancement may be applied
    for conduct that occurred prior to an investigation if the conduct was
    “purposefully calculated, and likely, to thwart the investigation or prosecution
    of the offense of conviction,” see § 3C1.1, Cmt. 1, which the district court
    specifically found in Waguespack’s case.
    In light of the record as a whole and the plain language of the statutory
    commentary, Waguespack fails to demonstrate that the district court clearly
    erred in applying the enhancement.
    2.    Waguespack’s sentence is substantively reasonable.
    Waguespack argues that, despite his sentence falling below the
    Guidelines, his sentence is substantively unreasonable because the district
    court failed to account for 18 U.S.C. § 3553(a)(6)).
    We review the substantive reasonableness of a sentence under an abuse-
    of-discretion standard. United States v. Halverson, 
    897 F.3d 645
    , 651 (5th Cir.
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    2018). However, “[a]ppellate review of the substantive reasonableness of a
    sentence is ‘highly deferential,’” and a within-Guidelines sentence is entitled
    to the presumption of reasonableness. 
    Hoffman, 901 F.3d at 554
    –55. The
    presumption is rebutted “only if the appellant demonstrates that the sentence
    does not account for a [18 U.S.C. § 3553(a)] factor that should receive
    significant weight, gives significant weight to an irrelevant or improper factor,
    or represents a clear error of judgment in balancing the sentencing factors.”
    United States v. Martinez, 
    921 F.3d 452
    , 483 (5th Cir. 2019) (quotation
    omitted).
    Section 3553(a)(6) requires courts to consider “the need to avoid
    unwarranted sentence disparities among defendants with similar records who
    have been found guilty of similar conduct.” “[W]here a sentence is within the
    guidelines range, the unwarranted-disparity factor is not afforded significant
    weight.” United States v. Martinez, 739 F. App’x 245, 247 (5th Cir. 2018)
    (mem.) (citing United States v. Diaz, 
    637 F.3d 592
    , 604 (5th Cir. 2011)).
    Because Waguespack’s sentence was below the Guidelines, his sentence
    is entitled to the presumption of reasonableness. His attempt to rebut the
    presumption by arguing that the district court failed to account for § 3553(a)(6)
    is unavailing because the unwarranted-disparity factor is not afforded
    significant weight in his case. Even if it was, he fails to offer evidence that his
    sentence represents an unwarranted disparity with similarly situated
    defendants. See Martinez, 739 F. App’x at 246–47. Waguespack includes
    statistics of sentences for child pornography offenses, but “[n]ational averages
    of sentences that provide no details underlying the sentences are unreliable to
    determine    unwarranted     disparity    because   they    do   not   reflect   the
    enhancements or adjustments for the aggravating or mitigating factors that
    distinguish individual cases.” United States v. Willingham, 
    497 F.3d 541
    , 544
    (5th Cir. 2007). The statistics that Waguespack provides “disregard individual
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    circumstances and only reflect a broad grouping of sentences imposed on a
    broad grouping of criminal defendants; consequently, they are basically
    meaningless in considering whether a disparity with respect to a particular
    defendant is warranted or unwarranted.” 
    Id. at 544–45.
             The district court stated that it considered all the factors in fashioning
    Waguespack’s sentence. Of note, the district court seemed to give significant
    weight to the victim impact statements and Waguespack’s offense being a
    serious offense which affected many people.
    The district court did not abuse its discretion in sentencing Waguespack.
    III.     CONCLUSION
    For the foregoing reasons, the district court’s judgment is AFFIRMED.
    21