Suspect in ‘Potomac River Rapist’ cold case arrested

Genealogy websites and a cheek swab enabled U.S. Marshals to arrest a man suspected of being the “Potomac River Rapist,” who terrorized the nation’s capital in the 1990s. News outlets report 60-year-old Giles Daniel Warrick is now awaiting extradition from Horry County, South Carolina. Authorities said DNA evidence matched family profiles in genealogy services, enabling investigators to narrow their search after interviewing Warrick’s relatives.

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