Jeffrey MacDonald was the quintessential American golden boy: a young Princeton-educated doctor and Green Beret who married his high school sweetheart and had two adorable daughters. But then, in 1970, someone viciously murdered MacDonald's wife and children, stabbing them many times. MacDonald maintained that the murders had been committed by demented hippies, Manson-like intruders who had broken into his home and, after tangling briefly with MacDonald himself, had moved on to the rest of the family. Various investigators and laypeople felt differently, but the evidence was inconclusive and it took years of court battles to bring MacDonald to justice. Joe McGuinness combines meticulous forensic analysis with a riveting narrative of the crime, investigation, and trial. He also paints a subtle psychological portrait of MacDonald, which unfolds over the course of the book to create a harrowingly plausible answer to the question: how could a man like Jeffrey MacDonald slaughter his entire family in cold blood?