The Defiance Post of the Ohio State Highway Patrol is investigating a school bus crash on County Road 16, at U.S. Highway 20, in Madison Township. Officials say…Aaron Mullins, of Pioneer…was driving the bus southbound on County Road 16 when he approached the stop sign at 20. Mullins then entered the intersection from the stop sign and was struck by a semi. No injuries reported. State and local investigators are on the case at this hour.