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No. 10340217
United States Court of Appeals for the Ninth Circuit
United States v. Graybael
No. 10340217 · Decided February 26, 2025
No. 10340217·Ninth Circuit · 2025·
FlawFinder last updated this page Apr. 2, 2026
Case Details
Court
United States Court of Appeals for the Ninth Circuit
Decided
February 26, 2025
Citation
No. 10340217
Disposition
See opinion text.
Full Opinion
NOT FOR PUBLICATION FILED
UNITED STATES COURT OF APPEALS FEB 26 2025
MOLLY C. DWYER, CLERK
U.S. COURT OF APPEALS
FOR THE NINTH CIRCUIT
UNITED STATES OF AMERICA, No. 23-3937
D.C. No.
Plaintiff - Appellee, 3:23-cr-00199-IM-1
v.
MEMORANDUM*
MARION BRENT GRAYBAEL,
Defendant - Appellant.
Appeal from the United States District Court
for the District of Oregon
Karin J. Immergut, District Judge, Presiding
Argued and Submitted February 5, 2025
Portland, Oregon
Before: BEA, KOH, and SUNG, Circuit Judges.
Marion Brent Graybael appeals his conviction, following a jury trial, for a
single count of assault resulting in serious bodily injury under 18 U.S.C.
§§ 113(a)(6), 1153. On appeal, Graybael argues that the district court abused its
discretion when it (1) admitted testimonial and photographic evidence of two prior
uncharged assaults Graybael committed against his girlfriend, the victim in the
*
This disposition is not appropriate for publication and is not precedent
except as provided by Ninth Circuit Rule 36-3.
charged assault; and (2) admitted expert testimony on domestic violence. As the
parties are familiar with the facts, we do not recount them here. We have
jurisdiction under 28 U.S.C. § 1291, and we affirm.
1. First, Graybael argues that, under Federal Rules of Evidence 404(b)
and 403, the district court erred in admitting testimonial and photographic1
evidence of two prior assaults he committed against the same victim as the charged
assault. “Where a district court errs in admitting other act[s] evidence, we review
for harmless error.” United States v. Charley, 1 F.4th 637, 651 (9th Cir. 2021)
(quoting United States v. Carpenter, 923 F.3d 1172, 1181 (9th Cir. 2019)). “[W]e
must ‘start with a presumption of prejudice’ as to the effect of ‘other acts’
evidence.” Id. (quoting Carpenter, 923 F.3d at 1182). Evidentiary errors are
harmless if “it is more probable than not that the erroneous admission of the
evidence did not affect the jury’s verdict.” Id. (quoting United States v. Hill, 953
F.2d 452, 458 (9th Cir. 1991)).
Assuming, without deciding, that the district court erred in admitting
evidence of the prior assaults, we nonetheless conclude that any error was
harmless. The prosecution presented overwhelming evidence on the two disputed
issues in the case: (1) whether Graybael was the assailant in the charged assault,
1
Photographic evidence was admitted regarding only one of the prior uncharged
assaults.
2 23-3937
and (2) whether the victim suffered “substantial bodily injury” as a result of the
attack. The victim identified Graybael as the assailant in her 9-1-1 call, to the
responding officer on the night of the charged assault, and again at trial. At no
point did the victim recant her testimony or identify anyone else as the assailant in
the charged assault. As to the severity of the victim’s injuries, the victim’s self-
assessed pain level was corroborated by testimony from the intake nurse, the
attending physician, and the victim’s cousin. Because the evidence supporting the
jury’s verdict was overwhelming, it is more likely than not that the admission of
the prior assault evidence did not affect the jury’s verdict.
2. Second, Graybael argues that, under Federal Rules of Evidence 702
and 403, the district court erred in admitting expert testimony on the cyclical
nature of domestic violence. We review Graybael’s challenge to the admission of
expert testimony at trial for an abuse of discretion. United States v. Flores, 901
F.3d 1150, 1155 (9th Cir. 2018). We conclude that the district court did not abuse
its discretion.
First, the admission of the expert witness testimony was proper under Rule
702. Under Rule 702, expert testimony must be both relevant and reliable. Messick
v. Novartis Pharms. Corp., 747 F.3d 1193, 1196 (9th Cir. 2014) (citation omitted).
On appeal, Graybael challenges only the relevance of the expert witness testimony,
not its reliability. “The relevancy bar [for expert testimony] is low, demanding
3 23-3937
only that the evidence ‘logically advances a material aspect of the proposing
party’s case.’” Id. (quoting Daubert v. Merrell Dow Pharm., Inc., 43 F.3d 1311,
1315 (9th Cir. 1995)). Here, the expert testified that it is “common for victims to
minimize what has happened to them” and that it is “common for [victims] to
recant or change their account at a later date.” This testimony was relevant to the
prosecution’s case because it helped the jury understand the dynamics of domestic
violence and provided the jury with an explanation for the victim’s self-blame,
praise and continued affection for Graybael, and the victim’s general reluctance to
meet with police and testify against Graybael.
Additionally, Graybael argues that the expert testimony was inadmissible
because such testimony can be used to address only issues beyond the common
knowledge of a layperson. This argument is not supported by our case law. See
Lopez-Umanzor v. Gonzales, 405 F.3d 1049, 1057 (9th Cir. 2005) (“[L]ay
understandings of domestic violence are frequently comprised of ‘myths,
misconceptions, and victim blaming attitudes.’” (quoting Hernandez v. Ashcroft,
345 F.3d 824, 836 (9th Cir. 2003))).
Additionally, the probative value of the expert testimony was not
substantially outweighed by the danger of unfair prejudice under Rule 403.2 The
2
The parties dispute whether the district court engaged in the balancing required
by Rule 403, and whether we should review this issue de novo. See United States
4 23-3937
expert testimony had significant probative value because it aided the jury in
evaluating the victim’s testimony and contextualizing her behavior towards
Graybael. Moreover, the expert testimony was general in nature and therefore
unlikely to incite a strong emotional response among jurors or cause unfair
prejudice.
AFFIRMED.
v. Wells, 879 F.3d 900, 914 (9th Cir. 2018) (explaining that de novo review is
appropriate “[w]here the district court fails to engage in necessary Rule 403
balancing”). Even assuming, arguendo, that de novo review is appropriate, we
conclude that the probative value of the expert testimony was not substantially
outweighed by a danger of unfair prejudice.
5 23-3937
Plain English Summary
NOT FOR PUBLICATION FILED UNITED STATES COURT OF APPEALS FEB 26 2025 MOLLY C.
Key Points
01NOT FOR PUBLICATION FILED UNITED STATES COURT OF APPEALS FEB 26 2025 MOLLY C.
02COURT OF APPEALS FOR THE NINTH CIRCUIT UNITED STATES OF AMERICA, No.
03Immergut, District Judge, Presiding Argued and Submitted February 5, 2025 Portland, Oregon Before: BEA, KOH, and SUNG, Circuit Judges.
04Marion Brent Graybael appeals his conviction, following a jury trial, for a single count of assault resulting in serious bodily injury under 18 U.S.C.
Frequently Asked Questions
NOT FOR PUBLICATION FILED UNITED STATES COURT OF APPEALS FEB 26 2025 MOLLY C.
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This case was decided on February 26, 2025.
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