A traffic stop early Saturday morning in Exira resulted in the arrest of a Cass County woman. The Audubon County Sheriff’s Department reports 37-year old Jessica Ann Ostrus, of Atlantic, was charged with OWI/1st offense after being pulled over at around 2-a.m., Saturday. She was brought to the Audubon County Jail and released after appearing before the magistrate. Her preliminary hearing was set for Sept. 17th.