Whether the warrantless stop of Carmouche's vehicle was supported by reasonable suspicion.
Holding
Yes. The informant's reliable tip, corroborated by the officers' observations, gave police reasonable suspicion to stop the Camry; the observed traffic violation independently justified the stop as well.
Reasoning
A Terry stop requires specific, articulable facts that, under the totality of the circumstances, reasonably suggest criminal activity. Police may rely on an informant's information if the tip carries sufficient indicia of reliability.
The informant was known to Sergeant Allen and had previously supplied accurate information about multiple suspects in a federal drug investigation. Her prediction that she and Carmouche would travel together, coupled with her arrival at the specified gas station with a man matching her description, corroborated the tip sufficiently to justify an investigative stop.
The informant's physical description and vehicle information were not precise in isolation, but reasonable suspicion depends on the whole picture rather than any single fact. In addition, Trooper Largent observed a traffic violation, which independently authorized the vehicle stop regardless of the officers' underlying investigative purpose.