The Nevada Highway Patrol says a ‘person of interest’ has been interviewed concerning the case of a man impersonating a police officer and conducting illegal traffic stops. That incident on I-580 this week was just the latest in a string of similar events on local roadways in recent days. In each, a man driving a Ford F-150 extended cab pickup–unmarked, but with flashing red and blue lights–stopped or tried to stop motorists. N-H-P investigators are looking for other witnesses and victims to come forward.