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,”…

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. He’s accused of raping 10 women and killing one of them between 1991 and 1998.

Montgomery County, Maryland, police Chief Marcus Jones says DNA evidence matched family profiles in genealogy services, enabling investigators to narrow their search after interviewing Warrick’s relatives.

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