Shadows of the Mind (1980)

From the director of "The Last House on Dead End Street" comes a film where a wealthy young woman is released from a mental hospital after witnessing the drownings of her parents; only for her psychiatrist, estranged brother, and his fiance to converge on her home for a series of grisly murders. "Shadows" was director Roger Watkins's second and final horror movie before dedicating his career towards directing porn, which he was already making at the time.