Pistol Harvest (1951)

"TIM ON A TRIGGER-HUNT FOR THE FRONTIER'S MR. BIG! Six-guns seek out the secret killer...when Tim and Chito find their ranch-boss murdered for his cash...and they set the West ablaze in their vengeance mission!"

Two men are accused of killing their boss. They are saved from the hangman's noose when two other guys are arrested, but Holt feels as though justice is still not being served. On their own, they set about to track down the genuine killer.