The Scream Murder unravels the mystery killing of 16-year-old Cassie Stoddart and the shocking tell-all videotape that was never meant to be seen. Coming October 6, or listen early starting September 22 by subscribing to 20/20 True Crime+. Subscribers to 20/20 True Crime+ get ad-free episodes, early access to new series, exclusive bonus content, and hundreds of episodes from the 20/20 true crime vault. Visit apple.co/2020truecrime to subscribe now. Terms apply.