The Fugitive (1963)

While working at a construction site in Utah, Kimble convinces his supervisor, Buck Harmon, to hire Jamie, a mentally retarded but physically strong young man to help out. Because Jamie is an easy target for the taunts of the other work crew members, Kimble becomes Jamie's protector. When Jamie is accused of sexually assaulting Buck's wife, he becomes frightened and runs away. The crew foreman, Dan Pike, convinces Buck to organize a posse to hunt down Jamie and kill him.