According to officials, the Buckwild star's body was discovered along with the body of his uncle and a third body -- whose identity has not been released despite family members already having been informed.
Shain and David were allegedly last seen leaving a Sissonville, WV bar at 3AM Sunday morning to go four-wheeling in Shain's vehicle.
Family and friends of the pair spent most of Sunday trying to find them before they eventually called 911, WTRF-TV reported.
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