Troy Kenneth Dahl, 34, of LaPine is accused of assault and menacing in an incident that happened Tuesday. Dahl and his unnamed friend were riding together in Dahl's Chevy Tahoe having a heated argument. Dahl drove the truck into a wooded area where he assaulted his victim with pepper spray and punching him. He then tore off his friend's prosthetic leg and threw it into the woods. Dahl then poured gasoline on the man and threatened to light him on fire. Dahl relented and instead threw the man and his prosthetic into the back of the Tahoe and dropped him off in the street in front of the victim's relative's house. Deputies found Dahl's abandoned Tahoe later that day. Yesterday, Dahl turned himself in and was placed under arrest.