(CNN) A serial assailant known as the Potomac River Rapist assaulted at least 10 women -- killing one of them -- during the 1990s, police and FBI said.

"The Potomac River Rapist brazenly and brutally preyed upon women in the Washington (DC) area," the FBI said in a 2011 plea for the public's help in the investigation. "Victims were attacked in their homes and included an 18-year-old babysitter and a mother whose infant was in the house at the time of the attack."

Giles Daniel Warrick, 60, was arrested in Conway, South Carolina.

Police in the DC metro area pooled resources for three decades looking for a suspect. They made an arrest this week -- another cold case they say was cracked by comparing DNA evidence to genealogy databases.

Giles Daniel Warrick, 60, was taken into custody Wednesday in Conway, South Carolina, where he'd recently moved, authorities said Thursday at a news conference. He'll be extradited from South Carolina to be prosecuted.

Authorities in the Washington area didn't know if Warrick had a lawyer yet. He has not yet entered a plea.