A truck on a mountain road in Oklahoma. Inside, $32,000 [music] in cash. Two phones, two wallets, a GPS, and a dog. Starving, still waiting in the backseat. The family was gone. The security camera shows them packing the truck [music] that morning. They make trip after trip. They don't speak to each other. They move like they're sleepwalking. They drive an hour into the Sans Bois [music] Mountains to look at 40 acres of land. Bobby is 44. Sherilyn is 40. Madison is [music] 6. 8 days later, hunters find the truck. Everything is inside. [music] Phones, wallets, $32,000 nobody can explain. The dog was still in the truck. 4 years later, hunters find three skeletons face down [music] side by side less than 3 miles from the truck. The medical examiner could not determine how they died. Both parents were on disability. Nobody knows [music] where the money came from. Nobody knows why they left everything in the truck. Nobody [music] knows what happened on that mountain. 16 years no answers. >> [music] >> What made them walk into those woods? Like and subscribe. Grave File TV, new file every week.