West Des Moines police said the car, driven by a male whose name was not released, was seen pulling into the West Des Moines Police Station early Friday and officers followed when it pulled into a private area for authorized personnel only, the West Des Moines (Iowa) Patch reported Thursday.
Police said they found a burnt end of a marijuana cigarette and a bag with marijuana residue in the car, but the man told them the objects were old and he hasn't "smoked any lately" since being on probation.
Alexandria Kay Siddens, 20, a passenger in the back seat of the car, was found to have prescription drugs hydrocodone and Elmiron in her purse as well as a driver's license belonging to a New Jersey woman.
The pair told police they were searching for the Beach Girls strip club.
Siddens was charged with illegal possession of Schedule II narcotics.