Drug him up, beat his ass, throw him in your trunk.
Drive about 500 miles (cross at least 3 state lines) and in the middle of the highway, drag him out of the side of the highway into the forest/marsh/whatever (out of sight of the road, about 300 yards at least, and remember which way you walked from) and strip him naked and take his clothes.
Leave him naked, drugged, beat up and passed out and quietly dispose of his belongings in your trunk, tell nobody you did it, and go home.
Problem solved 99 times out of 100. 8-)