The Door County Sheriffs Office released more details of a Washington Island traffic fatality from early Saturday morning.  24-year-old Roark Scott Kraft Davidson of Washington Island died in a one-vehicle crash on County Road W just north of Detroit Harbor Road.  According to the release, the preliminary investigation indicated the driver of a southbound red 1993 Cadillac Deville crossed the northbound lane and struck a tree on the east side of the road.  Davidson was pronounced dead at the scene and was the only person in the car.  The roadway was reportedly snow-covered at the time of the crash.  The accident remains under investigation pending an autopsy report from the Dane County Medical Examiner’s office.