My Brother-in-Law Killed My Sister

My Brother-in-Law Killed My Sister (French: Mon beau-frère a tué ma soeur, (French pronunciation: ​[mɔ̃bofʁɛʁ atɥe masœʁ] ) is a 1986 French comedy thriller film directed by Jacques Rouffio. It played in competition at the 36th Berlin International Film Festival.[1] In the film, two members of the Académie Française agree to help attractive young veterinarian Esther investigate the suspicious death of her sister. Esther is convinced her brother-in-law is responsible, but soon it becomes apparent that those responsible are linked to the very highest echelons of power in the Vatican.