During a traffic stop, a Georgia State Patrol officer returned Jamahl Matthews’s documents and issued a warning for an obstructed tag, expressly acknowledging that the stop was over. The officer nevertheless continued detaining and questioning Matthews about suspected drug activity, relying on nervousness, a borrowed vehicle, an interstate associated with drug transport, missing luggage, and perceived inconsistencies in Matthews’s travel story. A drug dog arrived, alerted, and officers found cocaine, a loaded pistol, and scales in the vehicle. The trial court denied suppression, but the Georgia Court of Appeals reversed. Once the traffic investigation ended, the officer could prolong the detention only with a particularized and objective basis for reasonable suspicion of other criminal activity. The State failed to carry that burden. The circumstances cited by the officer described innocent travel and did not distinguish Matthews from ordinary motorists; meaningless inconsistencies and use of Interstate 20 likewise did not establish reasonable suspicion. Because the search followed an unlawful extension of the stop, the seized evidence had to be suppressed and Matthews’s convictions for cocaine trafficking and firearm offenses reversed. Judge McMillian concurred in the judgment only.