Sean McGuire, 20, a student at Drake University in Des Moines, was charged with assaulting a police officer after officer Theodore Lister Stroope accused him of tossing candies at him, the Des Moines (Iowa) Register reported Sunday.

Stroope was handling a drunk driving incident at a convenience store when McGuire began throwing M&Ms, the report said.

University security officers at the store saw several chocolate candies landing on the ground near Stroope before one bounced off his shoulder, the police report said.

McGuire told authorities he was "sticking up for a friend" and allegedly proceeded to relieve himself in the back seat of Strope's police vehicle on the way to Polk County Jail, the Register said.