SPANISH FORK -- Authorities are investigating the death of a Spanish Fork teenager whose body was found in the middle of a rural Utah County road.
Sheriff's deputies say a motorist found the body of 17-year-old Nathan Haun lying on Arrowhead Trail early Saturday in Spanish Fork.
Investigators believe he fell from a moving vehicle, but are unsure whether the fall was accidental or intentional.
An autopsy will be performed to determine if Haun suffered any injuries before the fall.
Deputies say Haun had been at a house party in Payson hours earlier with other teens and they had been drinking.
They say investigators are having difficulty getting to the bottom of the case because other teens are being uncooperative or are unwilling to talk.