A rep for the Kanawha Country Sheriff's Office released a statement saying Shain's autopsy was completed today and the death was ruled an accident.

Shain's uncle and a male friend also died while inside Shain's 1984 Bronco which had stalled out in a mud pit while the crew went off-loading over the weekend.

The truck's exhaust pipe had apparently been submerged in mud causing the gas to leak back into the car.

As we reported yesterday the 21-year-old reality star as well as the two other were found yesterday morning by a passing ATV rider after the group had been reported missing.