In 1985, two best friends went to the rural Northern Michigan town of Mio to kick off their start of the deer hunting season; they never returned home. After 18 years a witness came forward to reveal the unspeakable fate of the hunters. At the time of their disappearance, the terrifying Duvall brothers lived near Mio. The brothers liked to drink, fight and tend to their pigs. And on the night the hunters died, they did all three.