Case Explained: United States of America v. Darren D. Duncan

Court: United States Court of Appeals for the Eighth Circuit Filed: 2026-08-04 The eighth-circuit affirmed the district court’s judgment convicting Darren Duncan of distributing fentanyl and imposing a sentence within the United States Sentencing Guidelines range. Applying the sufficiency of the evidence standard under *United States v. Oliver*, 90 F.4th 1222, 1224–25 (8th Cir. 2024), the court held that a rational trier of fact could find beyond a reasonable doubt that Duncan knowingly distributed a controlled substance. The court relied on witness testimony, text messages, and an autopsy report to conclude that the government satisfied its burden under *United States v. Campbell*, 986 F.3d 782, 809 (8th Cir. 2021), noting that proof of the exact nature of the substance is not required, only that it was a controlled substance of some kind. The court further distinguished the facts from *United States v. Cheshier*, 134 F.4th 534, 538 (8th Cir. 2025), finding sufficient evidence that Duncan distributed fentanyl to the victim. Consequently, the conviction and sentence are affirmed with no further proceedings required. Do It For The Case Law is a news reporting service. Nothing in this episode constitutes legal advice.