Shock (1946)

In this thriller, psychiatrist Dr. Cross (Vincent Price) kills his wife and expects to get away with murder, until he discovers that the slaying was observed by a next-door neighbor, Janet Stewart (Anabel Shaw). As Janet attempts to convince her husband (Frank Latimore) of the doctor’s dastardly deed, Cross shows up to advise him that Janet is in dire need of some in-depth counseling.