(Crime) The Judge and the Assassin - Philippe Noiret, Michel Galabru 1978

https://www.imdb.com/title/tt0073219/ An unstable former French Sergeant commits many atrocities. A judge considers how this case could benefit or damage his career. Un ancien sergent Français instable commet de nombreuses atrocités. Un juge examine comment cette affaire pourrait bénéficier ou nuire à sa carrière