9th Cir.

Dion Kirk Humphrey v. Federal Bureau of Investigation and United States Bureau of Alcohol Tobacco Firearms and Explosives

April 15, 2026 ·3:22-cv-00193-SLG ·Unpublished · By James Taylor

The Ninth Circuit affirmed a district court ruling that prohibited Dion Kirk Humphrey from possessing firearms due to a misdemeanor domestic violence conviction. The court rejected Humphrey's constitutional challenges regarding the ex post facto clause, Second Amendment rights, and due process.

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Background

Dion Kirk Humphrey appealed the district court’s grant of summary judgment to the government. The district court held that Humphrey was precluded from possessing firearms due to a conviction under the Anchorage Municipal Code that qualified as a misdemeanor crime of domestic violence. Humphrey argued that applying the federal prohibition to his 2010 conviction violated the ex post facto clause because the law was amended in 2022 to include local law convictions. He also claimed eligibility for a statutory exception and argued the prohibition violated his Second and Fifth Amendment rights.

The court’s reasoning

The court explained that the ex post facto clause does not apply because the relevant offense is the current crime of possessing a firearm, not the predicate domestic violence conviction. The court cited precedent stating that bona fide attempts to regulate future conduct by restricting firearm possession based on past conduct do not violate the clause. The court found the statutory exception inapplicable because Humphrey shares a child with the person he was convicted of abusing. The Second Amendment argument was precluded by a recent Ninth Circuit decision, and the due process claim was undercut by existing precedent and the availability of avenues to challenge the conviction.

What it means going forward

The ruling reinforces the enforceability of federal firearm prohibitions against individuals with misdemeanor domestic violence convictions, even when the statutory scope was expanded after the conviction occurred.

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