Come Deadly

Come Deadly is a 1974 pornographic horror film written and directed by Gil Kenston.

Rains walks Julie home after rehearsal, and the two have sex in her living room. Julie kicks Rains out after finding his gun, which makes her realize he is an undercover officer, and that everything he had told her up until that point was a lie. As soon as Rains leaves, the murderer breaks into Julies house, rapes and chokes her, and leaves her for dead. The next day, Julie approaches Rains in the theatre, and tells him to meet with her a few blocks away in fifteen minutes.Andy, the plays director, appears to a waiting Julie, and informs her that Rains will not be able to meet with her. A despondent Julie is followed home by the murderer, who sexually assaults and asphyxiates her while Rains has sex with Marie, another actress, back at the theatre. Rains tells Marie that he is a detective, and asks if she can help him with a plan he has concocted to flush out the killer. ........

Source: Wikipedia