A DNA sample taken from a man charged in the 1996 slayings of two female hikers does not match evidence in the unsolved slayings of three Spotsylvania County girls, authorities said Monday.

The FBI compared the DNA of Darrell David Rice, 34, of Columbia, Md., with forensic evidence in the slayings of Sofia Silva, 16, and sisters Kristin and Kati Lisk, 15 and 12.

Maj. Howard Smith of the Spotsylvania Sheriff’s Office said the laboratory analysis was routine and sheriff’s officials were notified of the results Monday morning.

Rice was charged earlier this month in the spring 1996 slayings of two hikers in the Shenandoah National Park. He has been serving a 136-month term in federal prison for an assaulting a female bicyclist in the park in 1997.

Authorities believe the same person killed Silva, who disappeared from the front porch of her home in September 1996, and the Lisk girls, who vanished after getting off the school bus at their home in May 1997.

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