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No. 9467564
United States Court of Appeals for the Ninth Circuit
United States v. Robert Duncan
No. 9467564 · Decided January 19, 2024
No. 9467564·Ninth Circuit · 2024·
FlawFinder last updated this page Apr. 2, 2026
Case Details
Court
United States Court of Appeals for the Ninth Circuit
Decided
January 19, 2024
Citation
No. 9467564
Disposition
See opinion text.
Full Opinion
NOT FOR PUBLICATION FILED
UNITED STATES COURT OF APPEALS JAN 19 2024
MOLLY C. DWYER, CLERK
U.S. COURT OF APPEALS
FOR THE NINTH CIRCUIT
UNITED STATES OF AMERICA, No. 22-10278
Plaintiff-Appellee, D.C. No.
2:19-cr-00090-KJM-1
v.
ROBERT PIERRE DUNCAN, MEMORANDUM*
Defendant-Appellant.
Appeal from the United States District Court
for the Eastern District of California
Kimberly J. Mueller, Chief District Judge, Presiding
Submitted January 10, 2024 **
San Francisco, California
Before: SILER,*** CLIFTON, and M. SMITH, Circuit Judges.
In March 2022, a California jury convicted Robert Duncan of trafficking a 17-
year-old victim by befriending her and then inducing her to engage in prostitution
* This disposition is not appropriate for publication and is not precedent
except as provided by Ninth Circuit Rule 36-3.
** The panel unanimously concludes this case is suitable for decision
without oral argument. See Fed. R. App. P. 34(a)(2).
*** The Honorable Eugene E. Siler, United States Circuit Judge for the
U.S. Court of Appeals for the Sixth Circuit, sitting by designation.
for his sole profit. While Duncan primarily sold his prostitutes—including the
victim—in person on the Oakland “blade,” he also set up online advertisements on
adult websites. Two of these advertisements of the victim included multiple pictures
of the victim in her underwear, a description of her, the prices Duncan would charge,
and his own phone numbers. At trial, the government successfully introduced PDF
copies of these advertisements as evidence. On appeal, Duncan argues that the trial
court’s decision to admit this evidence violated the Rules of Evidence because the
government failed to properly authenticate the advertisements and that his
conviction should therefore be vacated. Finding no error, we affirm the judgment.
The district court’s decision to admit evidence is reviewed for an abuse of
discretion. United States v. Tank, 200 F.3d 627, 630 (9th Cir. 2000) (“We review a
district court’s finding that evidence is supported by a proper foundation for an abuse
of discretion.”). If we find admission of the evidence to be a mistake, we then
proceed to determine if it was a harmless error. See United States v. Mehrmanesh,
689 F.2d 822, 832 (9th Cir. 1982) (examining a mistaken evidentiary ruling for
harmless error). Reversal is warranted only if any “error more likely than not
affected the verdict.” United States v. Workinger, 90 F.3d 1409, 1412 (9th Cir.
1996).
To show that evidence is admissible, the proponent must put forward
“evidence sufficient to support a finding that the item is what the proponent claims
2 22-10278
it is.” Fed. R. Evid. 901(a). Bearing this burden is simply a matter of making “a
prima facie showing of authenticity” sufficient for a reasonable jury to “find in favor
of authenticity or identification.” Tank, 200 F.3d at 630 (quoting United States v.
Black, 767 F.2d 1334, 1342 (9th Cir. 1985)). Once the prima facie case is made,
“[t]he government must also establish a connection between the proffered evidence
and the defendant.” Id.
Here, the government put forth the testimony of FBI Special Agent Schofield.
On October 11, 2018, Agent Schofield discovered two online prostitution
advertisements that included pictures of the victim alongside Duncan’s phone
number. Using his government computer, he utilized the “print to PDF” feature to
convert the webpages “to a file that could be saved on the computer.” Agent
Schofield testified that the exhibits the government sought to introduce were “fair
and accurate depictions” of what he saw online, and testified to the website where
he obtained them. He also testified that he had utilized this feature “probably
hundreds” of times and had never known it to change the content of the webpage.
The only information added to the file was a small date stamp and a URL indicating
the origin of the file. The government then connected the exhibits to Duncan by
referring to the listed phone numbers, which had already been shown to belong to
him.
Duncan objected that the exhibits lacked foundation. Specifically, he argued
3 22-10278
that the government failed to prove that Duncan himself had authored the
advertisements. The court overruled the objection and admitted the evidence,
reasoning that while the government could not definitively say at the time of
admittance that Duncan authored or created the advertisements, the government had
made a prima facie case of their authenticity—that is, the online prostitution
advertisements were what the government purported them to be—and that there was
sufficient connection between the advertisements and Duncan.
Because we agree with the district court that the government sustained its
burden to make a prima facie showing of authenticity and to connect the exhibits to
Duncan, we hold that the district court did not abuse its discretion in admitting them.
The purpose of Agent Schofield’s testimony was to prove that the exhibits were in
fact true and accurate representations of what he saw on the internet that day. His
testimony was not presented to prove that Duncan actually authored the posts. Once
the government proved that the exhibits were accurate copies of the prostitution
advertisements that Agent Schofield observed online, it was able to connect those
exhibits to Duncan through the phone numbers in the advertisements.
Duncan’s reliance on the Seventh Circuit’s decision in United States v.
Jackson, 208 F.3d 633 (7th Cir. 2000), is unavailing. In Jackson, the Seventh Circuit
affirmed a lower court’s decision to exclude screenshots from a white supremacist
chat room because they could not be authenticated under Rule 801. Id. at 637-38.
4 22-10278
However, the facts of the authentication dispute in Jackson are readily
distinguishable. In that case, there was significant evidence in the record of the
proponent’s untrustworthiness, leading the trial court to conclude that the proponent
failed to meet her prima facie burden that the screenshots were what she claimed
them to be, “as opposed to being slipped onto the groups’ websites by [the
proponent] herself, who was a skilled computer user.” Id. at 638. In this case,
however, Duncan never argued to the district court that Agent Schofield was
untrustworthy in his testimony authenticating the exhibits. Furthermore, the
government provided further evidence—apart from Agent Schofield’s testimony—
to make a prima facie showing that the online prostitution advertisements were what
the government claimed them to be.
Evaluated under the Rule 901 standard as expounded in Tank, “the
government made an adequate foundational showing of the relevance and the
authenticity” of the online prostitution advertisements. Tank, 200 F.3d at 631. The
district court did not abuse its discretion in admitting them, and once properly
admitted, it was up to “the jury to decide what weight to give that evidence.” Id.
AFFIRMED.
5 22-10278
Plain English Summary
NOT FOR PUBLICATION FILED UNITED STATES COURT OF APPEALS JAN 19 2024 MOLLY C.
Key Points
01NOT FOR PUBLICATION FILED UNITED STATES COURT OF APPEALS JAN 19 2024 MOLLY C.
02COURT OF APPEALS FOR THE NINTH CIRCUIT UNITED STATES OF AMERICA, No.
03Mueller, Chief District Judge, Presiding Submitted January 10, 2024 ** San Francisco, California Before: SILER,*** CLIFTON, and M.
04In March 2022, a California jury convicted Robert Duncan of trafficking a 17- year-old victim by befriending her and then inducing her to engage in prostitution * This disposition is not appropriate for publication and is not precedent exce
Frequently Asked Questions
NOT FOR PUBLICATION FILED UNITED STATES COURT OF APPEALS JAN 19 2024 MOLLY C.
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