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No. 10319923
United States Court of Appeals for the Ninth Circuit
United States v. Diaz
No. 10319923 · Decided January 23, 2025
No. 10319923·Ninth Circuit · 2025·
FlawFinder last updated this page Apr. 2, 2026
Case Details
Court
United States Court of Appeals for the Ninth Circuit
Decided
January 23, 2025
Citation
No. 10319923
Disposition
See opinion text.
Full Opinion
NOT FOR PUBLICATION FILED
UNITED STATES COURT OF APPEALS JAN 23 2025
MOLLY C. DWYER, CLERK
U.S. COURT OF APPEALS
FOR THE NINTH CIRCUIT
UNITED STATES OF AMERICA, No. 23-1341
D.C. No.
Plaintiff - Appellee, 8:21-cr-00084-JLS-1
v.
MEMORANDUM*
IAN R. DIAZ,
Defendant - Appellant.
Appeal from the United States District Court
for the Central District of California
Josephine L. Staton, District Judge, Presiding
Argued and Submitted January 15, 2025
Pasadena, California
Before: RAWLINSON and M. SMITH, Circuit Judges, and RAKOFF, District
Judge.**
Defendant-Appellant Ian Diaz was convicted on four counts arising out of a
cyberstalking scheme he orchestrated with his then-wife that was intended to frame
his ex-fiancé for various crimes. Those counts included: (1) conspiracy to commit
*
This disposition is not appropriate for publication and is not precedent
except as provided by Ninth Circuit Rule 36-3.
**
The Honorable Jed S. Rakoff, United States District Judge for the
Southern District of New York, sitting by designation.
cyberstalking, in violation of 18 U.S.C. § 371 (Count One); (2) cyberstalking, in
violation of 18 U.S.C. § 2261A(2) (Count Two); (3) perjury, in violation of 18
U.S.C. § 1621 (Count Three); and (4) obstruction of a Government investigation, in
violation of 18 U.S.C. § 1519 (Count Four). On appeal, Diaz raises multiple
challenges to those convictions. For the reasons stated below, we reject Diaz’s
challenges and affirm his convictions.
Turning first to Counts One and Two, Diaz argues that the district court
reversibly erred in instructing the jury on the mens rea element of section 2261A(2),
which criminalizes “us[ing] the mail [or] any interactive computer service” to
“engage in a course of conduct that . . . causes, attempts to cause, or would be
reasonably expected to cause substantial emotional distress to a person” with “the
intent to kill, injure, harass, [or] intimidate.” 18 U.S.C. § 2261A(2)(B). The district
court instructed the jury that the terms “harass” and “intimidate” have their “plain
and ordinary meaning.” Diaz argues, as he did below, that this instruction was
overbroad and defective under the Third Circuit’s holding in United States v. Yung,
37 F.4th 70 (3d Cir. 2022), as well, he claims, under various Supreme Court
precedents, including Counterman v. Colorado, 600 U.S. 66 (2023). None of the
cases on which Diaz relies is controlling here, as each either interpreted a different
statute, was decided by another circuit, or arose from a facial First Amendment
challenge rather than an instructional challenge. Moreover, in the latter context, this
2 23-1341
Court, in United States v. Osinger, 753 F.3d 939, 945 (9th Cir. 2014), held that the
term “harass” in section 2261A(2) is not an “esoteric or complicated term[] devoid
of common understanding.” Furthermore, the district court here correctly applied
our own precedent that when Congress has not specifically defined a statutory term,
we generally rely on that term’s ordinary meaning, see United States v. Neal, 776
F.3d 645, 652 (9th Cir. 2015); and that when a statutory term is expected to be within
a jury’s common understanding, we do not require district courts to define it, see
United States v. Lopez, 4 F.4th 706, 730 (9th Cir. 2021).1
For the first time on appeal, Diaz also argues that the district court reversibly
erred in instructing the jury on the “use” element of section 2261A(2). As to that
element, the district court instructed the jury that the Government was required to
prove that “the defendant used any interactive computer service” and that “through
the use of the computer interactive service . . . the defendant engaged in a course of
conduct that caused, attempted to cause, or would be reasonably expected to cause
substantial emotional distress to [the victim].” According to Diaz, these instructions
ran afoul of the Supreme Court’s intervening decision in Dubin v. United States, 599
1
For the first time on appeal, Diaz also argues, without reference to any Ninth
Circuit precedent, that the panel should construe the terms “intimidate” and “harass”
to refer to sexual harassment only. Such an argument, without more, is insufficient
to satisfy the “clear or obvious” prong of the plain-error standard governing forfeited
claims. See United States v. Johnson, 979 F.3d 632, 636 (9th Cir. 2020). And, in any
event, if Congress had intended such a limitation, it could easily have put such
modification in the words of the statute, which it did not.
3 23-1341
U.S. 110 (2023), which narrowly construed the word “use” in an unrelated
aggravated identity theft statute. The particular circumstances of the aggravated
identity theft statute are not remotely present here. We therefore affirm Diaz’s
convictions on Counts One and Two.
Turning next to Count Three, Diaz argues that the Government’s evidence as
to his perjury conviction was insufficient. That conviction was based on an answer
Diaz gave during a deposition in a related civil case. During the deposition, Diaz
was asked whether he had accessed the online accounts of his then-wife that were
used as part of the cyberstalking scheme. Specifically, he was asked: “What about
during your relationship with [your ex-wife]? Did you ever access [her] accounts?”
In response, Diaz falsely answered: “No.” At trial, the Government provided the jury
with a portion of the deposition transcript that redacted the questions and answers
immediately preceding the question and answer underlying Count Three. For the
first time on appeal, Diaz argues that there was insufficient evidence to support his
perjury conviction because the redactions deprived the jury of necessary context and
thereby rendered the question insufficiently precise. But, in our view, the redactions
did not introduce any ambiguity into the relevant question and answer. We therefore
reject Diaz’s sufficiency challenge and affirm his conviction on Count Three.
Finally, Diaz argues that the Government’s evidence was insufficient with
respect to Count Four, which was based on his deletion of his email account during
4 23-1341
the Government’s investigation. He primarily argues that the evidence showed that
he deleted his email account after the Government had already accessed it, such that
he neither intended to obstruct nor actually obstructed the Government’s
investigation. We disagree. At trial, a special agent testified that the Government
executed a search warrant for the account but “did not get any e-mails back because
the account had been deleted.” Both in light of that evidence and given the lack of
any affirmative evidence (beyond Diaz’s self-serving deposition testimony) that the
Government had already accessed the account pursuant to an earlier search, “any
rational trier of fact could have found the essential elements of [obstruction] beyond
a reasonable doubt.” United States v. Kirst, 54 F.4th 610, 623 (9th Cir. 2022)
(quoting United States v. Kaplan, 836 F.3d 1199, 1212 (9th Cir. 2016)).
Accordingly, we affirm Diaz’s obstruction conviction.2
AFFIRMED.
2
Diaz raises several additional unpreserved challenges to his obstruction conviction.
However, given that Diaz does not dispute that he deleted his email account, he has
not demonstrated that any of the potential errors he has identified prejudiced him or
“seriously affected the fairness, integrity, or public reputation of judicial
proceedings,” as required to prevail on plain-error review. Johnson, 979 F.3d at 636.
5 23-1341
Plain English Summary
NOT FOR PUBLICATION FILED UNITED STATES COURT OF APPEALS JAN 23 2025 MOLLY C.
Key Points
01NOT FOR PUBLICATION FILED UNITED STATES COURT OF APPEALS JAN 23 2025 MOLLY C.
02COURT OF APPEALS FOR THE NINTH CIRCUIT UNITED STATES OF AMERICA, No.
03Staton, District Judge, Presiding Argued and Submitted January 15, 2025 Pasadena, California Before: RAWLINSON and M.
04SMITH, Circuit Judges, and RAKOFF, District Judge.** Defendant-Appellant Ian Diaz was convicted on four counts arising out of a cyberstalking scheme he orchestrated with his then-wife that was intended to frame his ex-fiancé for various cri
Frequently Asked Questions
NOT FOR PUBLICATION FILED UNITED STATES COURT OF APPEALS JAN 23 2025 MOLLY C.
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