U.S. Court of Appeals for the Tenth Circuit

United States v. Ostertag

September 8, 2026

Summary

The Tenth Circuit affirmed the district court's judgment, holding that a well‑trained narcotics‑detection dog’s open‑air sniff of a vehicle is not a Fourth Amendment search, that any search arising from the dog’s later physical contact was justified by probable cause, and that 18 U.S.C. § 922(g)(1) does not violate the Second Amendment.