In 1991, nineteen-year-old Tammy Marquardt gave birth to a baby boy, Kenneth. Two years later he was dead. Tammy was convicted of his murder and sent to prison for life. Her conviction hinged largely on the evidence given by Dr. Charles Smith, the pediatric forensic pathologist at Toronto's famed Hospital for Sick Children. At the time, Dr. Smith was considered top in his field and his findings were never questioned.