In 1991, nineteen-year-old Tammy Marquardt gave birth to a baby boy. 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 pediatric forensic pathologist Dr. Charles Smith. At the time, Dr. Smith was considered top in his field and his findings went unquestioned. Tammy spent fourteen years in prison for a murder she did not commit. Then, an inquiry found that Dr. Smith was unqualified for his position and he had made serious errors in dozens of cases. Tammy was released on bail in 2009 and eventually acquitted of all charges in 2011.