A Town of Stockton man is dead following the crash of an All-Terrain Vehicle late Sunday afternoon. The Portage County Sheriff’s Office says 50 year old Keith A. Hoffman died when he lost control of the ATV he was driving and crashed into a ditch. Authorities say Hoffman was heading west on 2nd Street around 5:30 when the crash occurred. He was thrown from the vehicle and pronounced dead at the scene. The Wisconsin DNR is investigating the crash.