The Amazing Mr Malone – The Lucky Stiff. 1947.

Arturo is a gambler who is gaining a reputation for being lucky. Soon nobody wants to gamble with him. He has arguements with some in the gambling rings. He calls on Malone when he is threatened, but before Malone can get back to him, he is dead.

Malone follows up on some leads and not only helps the cops get the bad guy, but solve what happened, and who did it.