“WTOP’s American Nightmare Series” is a podcast covering true crime stories in the Washington D.C. region. Season 3, "Unknown Subject": For 9 years, he terrorized women across the DC region. Breaking into homes and raping his victims before killing a brilliant scientist near the gates of Georgetown University in 1998. And then, it all stopped. Had he died? Was he locked up? Before the FBI would name him the infamous Potomac River Rapist, detectives simply called him their “unknown subject” for years. A man whose DNA linked him to multiple crime scenes but whose name and face remained a mystery to police. For nearly three decades, detectives had no idea who he was until a bike cop named Smugs began connecting the dots.  Season 2, “Murder in a Safe Place," investigates the vicious rape and murder of 50-year-old nurse Sherry Crandell inside the DC-area hospital where she worked. Her murder has mystified not only the police, but her family and the community for the past two decades. Police have DNA evidence and fingerprints - even a witness to the attack - but no suspect. In “Murder in a Safe Place,” veteran DC reporter Paul Wagner tells a story that, by the final episode, will have you thinking there may be a chance for justice after all.Season 1, “22 Hours: An American Nightmare,” hosted by WTOP award-winning reporters Megan Cloherty and Jack Moore was named the No. 2 Podcast of the Year by The Associated Press and was listed among Apple Podcasts’ Most Popular New Shows of 2019. “22 Hours: An American Nightmare” chronicles the case that became known nationwide as the “DC Mansion Murders” – the horrific killing of a DC power couple, their 10-year-old son, and housekeeper – in a way no one has covered it before.