Killjoy(1981)

A romantic rivalry leads to an innocent woman's murder. Or is it a hoax crime, part of a cunning deception? At City General Hospital, two young doctors engage in a move-and-countermove rivalry over Laury Medford. It may be more than Laury's beauty that motivates the men. Her father is the hospital's chairman of the board. Marrying her would be an inside track to the chief of staff post. Meanwhile, a senior hospital staffer, who is the mother of one of the two doctors, plots to enhance her son's chances, a mysterious outsider who says he knew the dead woman tails the two men, and Laury may be more than she appears. Murder? Hoax? The answer isn't revealed till the final freeze-frame.