Autopsy results are in after a missing Oregon man was found in the Blue Mountains earlier this week.
Last November, 32 year old Jason Sartin went four wheeling near his home in Milton Freewater with his neighbor, Nathan Koerner.
Koerner said they both got drunk and Sartin stole his truck and drove off. He was missing until late last week, when the truck and his body were found in a canyon.
An autopsy concludes Sartin's death was accidental, but an exact cause could not be found.
Sheriff John Trumbo with the Umatilla County Sheriff's Office said, "We're going to go back up and take an accident reconstructionist with us. We're going to try and reconstruct what occurred. Hopefully we'll be able to get a little better idea of what occurred."
The Sheriff still wants to talk with Koerner, who police say changed his story, including being attacked by a giant poodle while walking out of the mountains. He reportedly has moved to the Tri-Cities.