Roaring Westward (1949)

"BOOM TOWN BAD MEN STRIKE ON THE SAVAGE GOLD FRONTIER!"

After claim jumper Sanders kills a miner, he changes clothes with Perry. In pursuit, the Marshal kills Perry claiming he was the murderer. Setting out to clear Perry's name, Jimmy works his way into the outlaw game. But Sanders overhears Jimmy's plans and he and his boss Morgan set a trap to kill Jimmy.