Authorities are investigating the death of a 23-year-old man whose body was found on a highway east of the city of Yankton.
The Yankton County Sheriff's Office says a preliminary investigation indicates that Joseph Bret Jackson of Yankton was killed in possible hit and run early Friday morning.
The body was found shortly before 4 a.m.
Sheriff Jim Vlahakis says no witnesses of the incident have come forth.
SD Associated Press