10th Cir.

UNITED STATES OF AMERICA v. KYLEAR WILLIAMS

March 17, 2026 ·1:24-CR-00112-PAB-1) ·Panel Decision ·PHILLIPS · By James Taylor

The Tenth Circuit reversed a conviction, ruling that the Fourth Amendment does not permit a protective sweep of a vehicle based solely on a passenger's romantic relationship with an arrested driver. The court held that the government's reliance on this association constituted an impermissible criminality-by-association test rather than a valid totality-of-circumstances analysis for reasonable suspicion.

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Kylear Williams was pulled over in Denver for a missing front license plate and failure to use a turn signal. The vehicle was registered to his girlfriend, Ajanaya Richardson. During the stop, officers learned Williams had a history of gang ties and was a felon, while Richardson had a valid license and no warrants. After Williams was arrested on municipal warrants and moved away from the car, officers conducted a protective sweep of the vehicle's driver's area. They found a loaded handgun and ammunition under the seat. The district court denied Williams's motion to suppress, ruling that the officers had reasonable suspicion that Richardson was armed and dangerous solely because she was the romantic partner of a gang-associated man being arrested. Williams pleaded guilty but reserved his right to appeal the suppression ruling.

The Tenth Circuit analyzed whether the protective sweep was reasonable under the Fourth Amendment, which requires that officers have a reasonable suspicion that a suspect is armed and dangerous and may gain immediate access to a weapon. The court rejected the district court's reliance on the 'romantic relationship' as a standalone justification. The opinion states that the government's argument amounted to a 'criminality-by-association test,' which is impermissible. The court emphasized that the test requires a 'totality of the circumstances' analysis. In this case, Richardson was polite, cooperative, and calm; she had a valid license and no warrants; she had just dropped off her daughter; and she did not communicate with Williams after his arrest. The court distinguished the case from United States v. Dennison, noting that the facts there involved a late-night stop in a high-crime area with a stronger inference of a common criminal enterprise, whereas Richardson was legally driving her car in a residential area. The court also cited United States v. Johnson from the Fifth Circuit, which similarly held that a romantic relationship alone does not justify a protective sweep without contemporaneous facts suggesting dangerousness. The court concluded that the officers lacked specific and articulable facts to believe Richardson was dangerous, as her relationship with Williams did not, by itself, create a reasonable fear for officer safety.

The conviction is vacated and the case is remanded for further proceedings. This decision clarifies that a romantic relationship alone cannot satisfy the reasonable suspicion requirement for a protective sweep of a vehicle. Law enforcement must identify specific, articulable facts beyond association to justify such a search. The ruling reinforces that the Fourth Amendment protects individuals from being detained or searched based solely on their relationship with a suspect.

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