El Vampiro Negro (1953)

This Argentine adaptation of M directed by Roman Barreto is a beautiful film. Amalia (Olga Zubarry), a single mother working in a low-rent cabaret, sees the Black Vampire, a serial child-murderer, throwing a body into the sewer. Told by her drug-dealing boss to stay quiet lest people learn of her sleazy profession, it’s ultimately her own daughter who is threatened. Self-consciously Freudian, dipping into the impoverished underworld, and featuring a memorable roller coaster ride involving the killer and one of his intended victims, El Vampiro Negro is a stylish and compelling noir.