The Pretender (1947)

Banker Kenneth Holden (Albert Dekker) steals funds from an estate and decides to marry the heiress, Claire Worthington (Catherine Craig), to safeguard his position. He arranges for her fiancé to be killed but does not state the fiancé's name. Claire, meanwhile, has a change of heart and marries Holden, so he now becomes the target of the killer and attempts to cancel the deal--except he doesn't know who the hired killer is.