Murder Obsession
Michael, a successful actor, has a scandal in his past: at a tender age he knifed his father to death. He and his girlfriend Deborah go to his mother's for the weekend, and are joined by the director and other colleagues who are given reception by the creepy housekeeper Oliver. Soon, rude things begin to happen to some of the guests, and Michael fears a repeat of his nightmare past is in progress.
Starring Stefano Patrizi, Martine Brochard, Henri Garcin, Laura Gemser, John Richardson, Anita Strindberg, Silvia Dionisio, Fabrizio Moroni
Watch "Murder Obsession" on Amazon Prime released in 1981. It's a mystery and horror movie, and has a rating of 5.3 out of 10 from Imdb which is fairly okay for this kind of movie.