Giles Warrick, accused of raping and killing a woman in D.C.’s Georgetown and sexually assaulting several others throughout the District and Montgomery County, Maryland, more than two decades ago, was found dead in his jail cell early Saturday.Warrick, 62, suspected of being the man once dubbed by the FBI as the “Potomac River Rapist,” was found dead in his cell at the D.C.Jail around 8:30 a.m. Saturday, two law enforcement sources told Paul Wagner, host of the podcast “American Nightmare: Unknown Subject.”Prosecutors have already reached out to victims to notify them of Warrick’s death.She said she expected the call to be an update on Monday’s hearing and was shocked to learn of Warrick’s death.And that’s something that sadly, even though he’s gone now, I’ll probably never be able to get his voice out of my head,” Kelly said."