Dr. Dredd's wagon of wonders

Some wierdo in a covered wagon rolls into town and starts charging people to see weird shit in his wagon. Turns out he is a creep, and wants to steal people's souls or something like that. He stages a bare knuckles wrestling match with his buffoon, where someone lifts him off the ground and kills him, or something like that. Anyway, I forget how it ends. Pretty decent book.