Once the Killing Starts (1974) is a TV Movie, Mystery, Drama, Thriller, Horror film that follows married college professor Michael Lane falls in love with one of his students and hatches an elaborate scheme to dispose of his wife, Elizabeth. His murder plot goes as planned. However, he soon receives an anonymous note: "I know what you did, murderer!" Prof. Lane frantically tries to discover who knows his secret... Once the Killing Starts is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 7.5 out of 10 from 2 votes. Fans of tv movie movies may also want to explore similar titles below.