Apology for Murder

Apology for Murder is a 1945 American film noir directed by Sam Newfield, and starring Ann Savage, Hugh Beaumont, Russell Hicks and Charles D. Brown.

Tough reporter Kenny Blake Beaumont falls in love with sultry Toni Kirkland Savage who is married to a much older man Hicks. She seduces him to murder her husband. City editor Ward McKee Brown, Kennys boss and best friend, begins to pursue the tangled threads of the crime relentlessly and gradually closes the net on Kenny. In the end Tony and Kenny shoot each other. As he dies, Kenny types out his confession to the crime.

Source: Wikipedia