For centuries criminals have tried to get away with the perfect crime. But for the perfect murder, killers have long realised: no corpse, no murder. In this study of over 30 cases, the author uncovers to what lengths murderers went to conceal the evidence. Their savage but ingenious methods included grinding bodies into sausages, eating them, feeding them to pigs and flinging them into acid baths. However meticulous and brilliant, none of them actually got away with the crimes. Included in this book are John Haigh who plunged Olive Durand-Deacon into a vat of sulphuric acid - but did not realise that false teeth take at least two weeks to corrode and that gallstones are practically indestructable. And Dennis Nilsen, who dismembered his victims, and was finally caught when the toilets wouldn't flush in his building in Muswell Hill because they were clogged with body parts. This macabre book reveals the painstaking investigation and forensics that led to the final unmasking of the sadists and psychotics who sought such bloody concealment of their crimes.