Deranged

Deranged (also known as Deranged: Confessions of a Necrophile) is a 1974 psychological horror film directed by Alan Ormsby and Jeff Gillen, and starring Roberts Blossom. Its plot, loosely based on the crimes of Ed Gein, follows Ezra Cobb, a middle-aged man in a rural Midwestern community who begins a string of serial murders and grave robberies after the death of his mother, a religious fanatic who raised him to be a misogynist. Though based on Gein, the film's title is misleading since Gein never experimented with necrophilia; although a necrophile is also defined as having "an obsessive fascination with death and corpses."