John Trestrail

…Scotland Yard had kept three strands of hair and charges £17,500 to run a test on two of them. Unwilling to pay that steep fee, Trestrail turns to the Royal London Hospital archives, which had preserved nine pieces of tissue from the case. At Trestrail's request, the historic medical facility hands over a nearly century-old tissue sample of the torso found…

…John Trestrail, a modern-day forensic toxicologist, is unsettled by the circumstantial evidence in Dr. Crippen's case. He's never heard of a poisoning case where the murderer also dismembered his victim. If Dr. Crippen had both poisoned and dismembered Cora, it doesn't make sense that he would have disposed of so much of the body only to leave incriminating…