A Clay County sheriff’s deputy retreated to a safe distance from a van burning in a field Tuesday afternoon after he heard the sound of live ammunition going off inside it. The deputy found the van burning near Old State Highway 210 and Bluff Road, south of Liberty, about 2:30 p.m., said Jon Bazzano, a spokesman for the Clay County Sheriff’s Office. Eventually, the deputy found the owner of the vehicle watching the fire from a distance.