Bandits of Dark Canyon (1947)

THEY BREAK LOOSE WITH EVERYTHING THEY HAVE...AND THEY HAVE PLENTY!

As prisoner Ed Archer is being transferred, the stage is attacked and crashes. Archer escapes the attackers but Ranger Rocky Lane catches up with him. As Rocky is bringing him in, Archer is attacked again. Somebody wants Archer killed and Rocky, now suspecting Archer is innocent, decides to find out who and why.