Trail Guide (1952)

In an effort to keep homesteaders off the open ranges near his and his sister Peg's ranch, young Kenny Masters hires crooked saloon owner Regan to steal their claims. As the settlers' wagonmaster is ambushed and robbed, and the town marshal is killed, Kenny gets cold feet as good-guy trail guide Tim Holt and his partner Chito suspect him of the wrongdoings.