The body of a 26-year-old Challis man missing for 17 months was found along the banks of the Salmon River, Lemhi County authorities said.
Colin Hardinger drove his car off U.S. Highway 93 into the river in the early hours of June 6, 1996.
Authorities assumed he had died after they found his car and eventually gave up the search, which was hindered by high water.
His body was found Monday about six miles south of Salmon, a mile from where deputies think his car entered the river. They believe he probably fell asleep at the wheel.