The Accused(1949)

When college student Bill Perry grows inappropriately fond of psychology professor Wilma Tuttle and tries to rape her, her self-defense inadvertently kills him. Wilma then moves Bill's corpse to a nearby beach and makes his death look like the result of a cliff diving accident. But her guilt over the incident builds, and Lt. Ted Dorgan begins to suspect that Wilma knows more than she's letting on.