Hidden Valley Outlaws (1944)

Gilbert Leland (Roy Barcroft), a crooked lawyer scheming to swindle the local ranchers out of their property, employs a henchman, known as The Whistler (LeRoy Mason), an unemotional killer who whistles while his guns are barking. He shoots rancher Daniel Clark (Charles Miller), and his son Danny (John James) hides in the hills and tries to pick off the killers.Leland sends for Wild Bill Elliott (Bill Elliott), a roving lawman. Bill and his sidekick Gabby ("George 'Gabby' Hayes') are completely taken in by Leland, and they capture Danny, who is killed in the ensuing fracas and, then, Leland's crooked sheriff blames it on Bill and Gabby.