This Man Must Die

This Man Must Die (French: Que la bête meure), also titled Killer! in the UK, is a 1969 French–Italian psychological thriller film directed by Claude Chabrol. It is based on the 1938 novel The Beast Must Die by Cecil Day-Lewis, writing as Nicholas Blake. The story follows a widower who, obsessed with revenge after his only son is killed in a hit-and-run incident, tracks down the driver with the intent to kill him.