8 Femmes (8 Women)
Marcel (Dominique Lamure) was not murdered. The whole thing was a setup by his younger daughter Catherine (Ludivine Sagnier), who staged the fake murder to get all the other women to confess their secrets (which she believes will release her father from their influence). After she reveals this to all the other women, she opens the door to the bedroom to reveal Marcel, who shoots and kills himself.
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Read more about this film at The Internet Movie Database.