The South Dakota Department of corrections says a missing minimum security inmate is back in custody. They say he was arrested overnight Monday in Rapid City. The DOC says 24-year old Cody Larson left his community service job in Rapid City without authorization overnight Sunday. Larson is white, 6'2" and 170 pounds with blond hair and blue eyes. He is serving a three year sentence out of Pennington County for ingestion of a controlled substance.