Ben Rockwell is transporting a prisoner named Steve Fontaine by train. Fontaine is manacled by an "Oregon Boot" and Rockwell has the only key. During the trip, Fontaine manages to convince Rockwell to let him go, but Rockwell changes his mind. He and Fontaine struggle and Rockwell is shot and killed. When Fontaine finds the key to the boot, he sees that it has been destroyed by the bullet.
click here to see where to watch or (watch here).
Ready to Watch Alfred Hitchcock Presents, Season 2, Episode 18?