4th Cir.

United States v. Vanderpool

June 17, 2026 ·25-4121 ·Per Curiam · By Aisha Johnson

The Fourth Circuit affirmed the conviction of a police officer who coerced a woman into sex and filed a false report to cover his actions. The court rejected challenges regarding the intent element of the obstruction statute, the denial of a Franks hearing, the good-faith exception to the exclusionary rule, and a claim of substantial prejudice from prosecutorial delay.

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Background

Defendant Martique Vanderpool, a police officer, arrested a distressed nineteen-year-old for speeding, impounded her vehicle, took her to an empty police station, and coerced her into having sex with him. To conceal his conduct, Vanderpool filed a report claiming he conducted a routine traffic stop. He was subsequently convicted of submitting a false report to impede a federal investigation in violation of Section fifteen nineteen of Title eighteen of the United States Code.

The court’s reasoning

The court held that knowledge of a federal investigation is a jurisdictional element rather than a separate mens rea requirement, meaning the government was not required to prove Vanderpool reasonably foresaw a federal investigation. Regarding the Franks hearing claim, the court found Vanderpool failed to make a substantial preliminary showing that omitted facts regarding the initial stop or witness inconsistencies would have defeated probable cause for the search warrant. On the suppression motion, the court applied the good-faith exception, noting Vanderpool failed to explain how the warrants were so facially deficient that officers could not reasonably rely on them. Finally, the court rejected the due process claim regarding delay, finding Vanderpool did not establish substantial actual prejudice because his own admissions in a related trial were inculpatory and the unavailable witnesses would not likely have affected the disposition of the proceeding.

What it means going forward

The decision reinforces that intent to impede a federal investigation under Section fifteen nineteen does not require proof that the defendant knew the investigation was federal, and it sets a high bar for defendants seeking Franks hearings or claiming prejudice from delay based on unavailable impeachment evidence.