I believe this film is based on a real double murder by Bernard Coustie in 1970, and follows that closely until the final scenes. I was shocked by the Benny Hill quality of the love scenes which undermines the early scenes. The acting as a whole has a semi-comic feel and the film is short and feels perfunctory - if it wasn't Chabrol would we even remember it?
However, the score is terrific, and as a time-capsule of small town France it is entertaining.