A Plymouth County deputy conducted a traffic stop on a vehicle on 12/24/18 at approximately 12:42 p.m. for a traffic violation.  The driver of the vehicle, Onna Olson, age 27 of Sioux City, Iowa, was found to be in possession of a controlled substance believed to be marijuana and a glass pipe commonly used for smoking marijuana.  Onna Olson was cited into court for possession of a controlled substance and possession of drug paraphernalia.  Onna Olson was then free to leave.