I Can't Sleep (1994) review

Daïga (Katerina Golubeva) travels from Lithuania to Paris (with little money) to stay with her Great Aunt and try to land an acting job (but is stuck being a cleaning woman), Théo (Alex Descas) wants to return to his native Martinique with his son but his wife Mona (Béatrice Dalle) objects ... and drag performer Camille (Richard Courcet) is going around killing and robbing elderly women.  It's based (loosely) on the true story of Thierry Paulin, a French serial killer (who died of AIDS prior to his trial), and allows the auteur the opportunity to touch on two subjects she's been (mainly) interested in throughout her whole career, toxic masculinity (in this case both hetero- and homosexual) as well as the hardships faced by immigrants.  Yet, in typical Denis fashion, it's presented rather coyly: she's adept at (intentionally) draining any sort of tension out of a scene and it's never clear what's transpiring in Camille's mind (he doesn't have many lines, but is shown to be kind to friends).  If you have a chance and like crime stories, take a minute and read about Paulin's psychopathic behavior ... just not before you go to bed.