United States of America v. Derek Underdahl

United States Court of Appeals
For the Eighth Circuit
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No. 24-3567
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United States of America
Plaintiff - Appellee
v.
Derek Underdahl
Defendant - Appellant
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Appeal from United States District Court
for the Southern District of Iowa - Eastern
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Submitted: November 21, 2025
Filed: August 4, 2026
[Unpublished]
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Before BENTON, GRASZ, and STRAS, Circuit Judges.
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PER CURIAM.
Police found twelve rounds of ammunition in Derek Underdahl’s Iowa home
while executing a search warrant there. A jury then found Underdahl guilty of
possessing ammunition as a convicted felon under 18 U.S.C. §§ 922(g)(1) and
924(a)(8). Underdahl appeals, and we affirm.

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Underdahl turned himself in to police as a person of interest in an investigation
of a shooting. Police then obtained a warrant to search Underdahl’s home for
weapons and ammunition. Underdahl had an infant child, and he shared the home
with his sister, stepfather, and mother. While searching the upstairs bedroom, police
found various items identifying or associated with Underdahl. Police also found
men’s and infant’s clothing in the room. Then, police found a plastic baggie with
twelve rounds of ammunition in one of the room’s closets. Eight rounds were
Winchester brand, and four were Federal Cartridge brand. At trial, ATF Special
Agent Robert Friend testified that Winchester and Federal did not manufacture their
ammunition in Iowa.
During Underdahl’s criminal proceedings, he moved to dismiss the
indictment, arguing § 922(g)(1) was unconstitutional as applied to him. The district
court1 denied the motion at the start of trial. When the government rested, Underdahl
moved for a judgment of acquittal, arguing the evidence was insufficient to prove he
possessed the ammunition and that it had moved in interstate commerce. The district
court also denied that motion. Later, during its deliberations, the jury asked the
district court to clarify a jury instruction regarding proof of Underdahl’s knowledge.
The district court told the jury it could consider Underdahl’s acts or statements “in
connection with the alleged offense.” But the district court declined Underdahl’s
request to reinstruct the jury that it could not consider his “decision to refrain from
testifying . . . .” The jury then found Underdahl guilty, and the district court denied
his renewed motion for judgment of acquittal and motion for new trial.
On appeal, Underdahl argues that (1) the government presented insufficient
evidence to support the possession and interstate commerce elements of § 922(g)(1);
(2) the district court improperly instructed the jury; and (3) § 922(g)(1) is
unconstitutional as applied to him.
1 The Honorable Stephanie M. Rose, Chief Judge, United States District Court
for the Southern District of Iowa.

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We begin with Underdahl’s two sufficiency arguments. “We review the denial
of a motion for judgment of acquittal de novo, viewing the evidence and all
reasonable inferences in the light most favorable to the jury’s verdict.” United States
v. McDonald, 826 F.3d 1066, 1072 (8th Cir. 2016). “A judgment of acquittal . . . is
warranted only when no reasonable jury could have found all the elements beyond
a reasonable doubt.” United States v. Collier, 116 F.4th 756, 767 (8th Cir. 2024)
(cleaned up); see also United States v. Tyus, 167 F.4th 1008, 1013 (8th Cir. 2026)
(listing four elements of § 922(g)).
First, Underdahl contends the evidence was insufficient to prove that he
constructively possessed the ammunition found in the house. We disagree.
“Constructive possession is defined as knowledge of presence of the contraband plus
control over the contraband.” United States v. Walker, 103 F.4th 515, 519–20 (8th
Cir. 2024) (quoting United States v. Young, 68 F.4th 1095, 1098 (8th Cir. 2023)),
cert. denied, 145 S. Ct. 579 (2024). Knowledge and control “‘may be inferred where
a defendant has exclusive possession of the premises’ where ammunition is found.”
United States v. Spencer, 50 F.4th 685, 688 (8th Cir. 2022) (quoting United States v.
Dooley, 580 F.3d 682, 686 (8th Cir. 2009)). But if a defendant shares the premises
with others, proving constructive possession “takes more evidence of knowledge and
control” than “a ‘mere connection’ to the residence . . . .” Id. (quoting United States
v. Ways, 832 F.3d 887, 897–98 (8th Cir. 2016)).
The government presented sufficient evidence that Underdahl had more than
a mere connection to the upstairs bedroom where the ammunition was found.
Officers found a debit card with Underdahl’s name on it, a jury summons addressed
to Underdahl, a birthday card to Underdahl, and a drawing of Underdahl with his
child’s mother, who did not live at the house. See United States v. Cross, 888 F.3d
985, 991, 993 (8th Cir. 2018) (affirming finding of constructive possession when
contraband was found in room that contained men’s clothes, along with documents
addressed to defendant, and was off limits to female joint occupant). The men’s and
infant’s clothing in the upstairs bedroom likewise suggests that Underdahl occupied
the bedroom. See id. Viewed in the light most favorable to the verdict, this evidence

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was sufficient for a rational jury to find that Underdahl constructively possessed the
ammunition in the bedroom closet.
Second, Underdahl argues the government did not present sufficient evidence
that the ammunition traveled in or affected interstate commerce. Expert testimony
that a certain kind of ammunition is not manufactured in the state where it was found
can satisfy § 922(g)’s interstate commerce element. See United States v. Haynes, 62
F.4th 454, 458–59 (8th Cir. 2023); United States v. Nash, 627 F.3d 693, 696–97 (8th
Cir. 2010). Here, Special Agent Friend testified that Winchester and Federal
ammunition — the two brands found in Underdahl’s Iowa home — are not
manufactured in Iowa. Viewed in the light most favorable to the verdict, this
evidence was sufficient for a rational jury to find that the ammunition traveled in
interstate commerce.
Even so, Underdahl contends that Friend was not credible because the
information in Friend’s report was not current when he drafted it. But Friend
testified that the information in his report was current at the time police found the
ammunition. And regardless, “[b]ecause the jury is the final arbiter of witness
credibility, its credibility determinations are virtually unassailable on appeal.”
United States v. Morris, 109 F.4th 1078, 1082 (8th Cir. 2024). Thus, Friend’s
testimony sufficed to establish the ammunition passed through interstate commerce.
We turn to Underdahl’s next argument, in which he contends the district court
should have reinstructed the jury not to consider his “decision to refrain from
testifying.” We review for abuse of discretion. See United States v. Maupin, 3 F.4th
1009, 1014 (8th Cir. 2021). “A defendant is not entitled to a particularly worded
instruction as long as the instructions fairly and adequately instruct the jurors on the
applicable law.” United States v. Gilmore, 968 F.3d 883, 886 (8th Cir. 2020). Nor
must a district court repeat a jury instruction it has already clearly given. Maupin, 3
F.4th at 1015.

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In response to the jury’s question about proof of Underdahl’s knowledge, he
insisted that the district court add an instruction reminding the jury not to consider
his “decision to refrain from testifying.” But the district court had already instructed
the jury that Underdahl’s choice “not [to] testify must not be considered by you in
any way or even discussed in arriving at your verdict.” And the district court fairly
and adequately instructed the jurors on the applicable law when it explained that
they could consider Underdahl’s statements and acts “in connection with the alleged
offense.” So the district court did not abuse its discretion by declining to repeat an
instruction it had already given. Id.
Finally, Underdahl contends that § 922(g)(1) is unconstitutional as applied to
him. As he concedes, however, precedent forecloses this as-applied challenge.2 See
United States v. Cunningham, 114 F.4th 671, 675 (8th Cir. 2024) (citing United
States v. Jackson, 110 F.4th 1120, 1124–25 (8th Cir. 2024), cert. denied, 145 S. Ct.
2708 (2025)).
Therefore, we affirm the district court’s judgment.
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2 Even if an as-applied challenge to the felon-in-possession statute were
available to Underdahl, he could not succeed. He has multiple criminal convictions,
several of them violent. This criminal history leaves no doubt that he “present[s] a
credible threat to the physical safety of others.” United States v. Rahimi, 602 U.S.
680, 700 (2024).

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