Over the weekend, Giles Warrick — the man accused of being the so-called Potomac River Rapist — was found dead in a DC jail cell. DC police say he killed himself days before he was set to stand trial for the 1998 raping and killing a young woman and talented scientist. We hear from Paul Wagner, host of WTOP’s “American Nightmare: Unknown Subject.” He’s been following this case for years. Paul tells us what we know about Warrick’s death and how the victims of the Potomac River Rapist are responding to it.