The Cass County Sheriff’s Office reports the arrest last week of 18-year old Christian Monreal Sempek, of Atlantic. Sempek was taken into custody on March 20th, on charges of Possession of a Controlled Substance and Possession of Drug Paraphernalia. He was taken to the Cass County Jail where he was released later that day on his own recognizance. A juvenile female was also cited into Juvenile Court on the same charges.