Phantom Killer (film)

 Phantom Killer is a 1942 American romantic mystery film directed by William Beaudine, and starring Dick Purcell, Joan Woodbury and John Hamilton. The film was a remake of Phil Rosen's "The Sphinx".
Plot.
A series of murders seems to implicate a deaf-mute philanthropist, except he has ironclad alibis for all of them. Besides, he has spoken to at least one man who was nearby when the latest killing occurs.