Armored Car Robbery (1950)

Dave Purvis takes pride in being unknown to the law, though famed among fellow crooks as a planner He plots a holdup in meticulous detail, but things go wrong: a cop and two robbers are killed, and Purvis hides out with the money while Lieutenant Cordell, friend of the dead cop, investigates. Purvis' new getaway plan shows promise, but could have one tiny flaw.