The Snorkel (1958) [BluRay] [720p] [YTS] [YIFY] Paul Decker murders his wife in her Italian villa by drugging her milk and asphyxiating her by gas. He cleverly locks the bedroom from the inside and hides inside a trapdoor in the floor until after the body is discovered by servants. He uses a scuba snorkel connected to tubes on the outside to breathe during the ordeal. Decker's stepdaughter Candy suspects him immediately, especially since no suicide note was found. She also is convinced that he murdered her father years before, but her accusations fall on deaf ears. The ruthless Decker even poisons the family spaniel when the pet takes too great an interest in the mask and realizes he will ultimately have to get rid of Candy too.
Jacques Duval devises a fiendishly clever method of murdering his wife. Doping her up with sleeping tablets, Duval places his wife in a sealed room, then opens all the gas jets. While the police identify the body, Duval remains hidden in the room, breathing through a snorkel, then makes his escape when the authorities leave. Only one flaw in this perfect crime: Duval's stepdaughter (Mandy Miller) is the suspicious type.