The Whistler (1944 film)

The Whistler is a 1944 American mystery film noir based on the radio drama The Whistler. Directed by William Castle, the production features Richard Dix, Gloria Stuart and J. Carrol Naish. It was the first of Columbia Pictures eight Whistler films starring Richard Dix produced in the 1940s.

Suddenly Conrad learns that his wife is still alive, and he tries to call off the hit. Unfortunately, the underworld gobetween who made the deal with him has been killed in the meantime, leaving Conrad unable to learn the identity of the actual hit man.The pathological hired killer, obsessed with carrying out his mission, stalks Conrad as the frightened industrialist stays on the move. Always looking over his shoulder and trying to think of a way to survive, Conrad keeps running into other dangers, including the vengeance of the dead mans wife. ........

Source: Wikipedia