Corpse

When detectives come upon a murder victim, there's one thing they want to know above all else: When did the victim die? The answer can narrow a group of suspects, make or break an alibi, even assign a name to an unidentified body. But outside the fictional world of murder mysteries, time-of-death determinations have remained infamously elusive, bedeviling criminal investigators throughout history. Armed with an array of high-tech devices and tests, the world's best forensic pathologists are doing their best to shift the balance, but as Jessica Snyder Sachs demonstrates so eloquently in…