The Showdown (1950)

Shadrach Jones, ex-Texas State Policeman, has the ruthless determination to find and kill the man who shot his brother in the back and stole the money with which he was to buy a ranch for the two of them. At the saloon-hotel run by Adelaide, Shadrach is convinced that one of the cowhands on the Captain McKellar cattle drive to Montana is his man. He takes the job of trail-herd boss to find the killer. McKellar preaches to Jones that he should forget revenge and let the law of retribution take care of the killer. Shadrach's hard driving of the men and his hunt for the killer makes him bitterly hated, and his retribution quest ends in a manner he did not anticipated.