On 2/21/19 at approximately 2:30 a.m., the Plymouth County Sheriff's Office conducted a traffic stop on a vehicle in the 200 block of 4th Avenue NE in Le Mars, Iowa due to a traffic violation.  The driver of the vehicle was identified as Katherine Elizabeth Martinac, age 34 of Le Mars.  Upon further investigation, Katherine Martinac was placed under arrest for drug possession and transported to the Plymouth County Jail where field sobriety tests were conducted.  Katherine Martinac was then booked into the Plymouth County Jail for OWI first offense, possession of methamphetamine first offense, possession of drug paraphernalia and no valid driver's license.