The butcher is the killer. That is not a spoiler. Everyone in the film, not least Stéphane Audran as his lover, lives with the inevitable, eventual disclosure.
LE BOUCHER
Claude Chabrol
1972
Stéphane Audran, Jean Yanne, Antonio Passalia, Pascal Ferone, Mario Beccara, William Guérault
Written by Claude Chabrol and Paul Gégauff