The Shawano County Sheriff’s Office is investigating an ATV accident that resulted in a death early this morning. Authorities say a 19 year old man was killed when the ATV he was driving apparently crashed off Killdeer Lane in the Town of Aniwa, about a mile north of Birnamwood. He was pronounced dead at the scene. An 18 year old female passenger was not hurt. The crash happened just after midnight this morning. No other details of the incident have yet been released.