The Killing Kind is a 1973 horror film of the serial killer type and has a heavy element of unhealthy mother/son relationship. The convicted rapist (played by John Savage) returns home to his mother (played by Ann Sothern) after a 2-year prison stay, and bad things happen. Cindy Williams, Luana Anders, Ruth Roman (who was in Hitchcock's Stranger on a Train), Marjorie Eaton (who had small parts in many well-known films and TV shows and who was also a painter), and Peter Brocco (who has a Star Trek connection and Superman credits) also star. Curtis Harrington directs.
This is worth watching, a very sad movie.
1000 Misspent Hours says, "it really is a highly effective and often genuinely disturbing film." DVD Talk has a positive review. Gore Girl's Dungeon calls it "more of a psychological drama with some horror elements" and highly recommends it.