Dr. Phil continues his interview with Tommy, who accuses his ex-wife, Julia, and her new husband, Codey, of killing his 19-month-old son, Darby, and 4-year-old stepdaughter, Kiera — an allegation the couple vehemently deny. Dr. Phil enlists the help ... (more)of forensic pathologist Dr. Cyril Wecht to examine the autopsy reports of Darby and Kiera, who died three months apart, while in the care of Julia and Codey. What are his findings? And, hear from police — are the investigations still open? Julia and Codey say they’re tired of being falsely accused, and they want to prove their innocence. When offered the opportunity to take polygraph tests to clear their names, will they accept?