Troopers said Alan W. Wilmer Sr. killed Laurie Ann Powell in 1988. The 18-year-old woman was last seen alive on March 8 of that year, walking to a party along Hickory Fork Road toward Route 17 in rural Gloucester County. Her body was discovered on April 2 in the Elizabeth River. She had been stabbed multiple times.

Last year, the deceased Northern Neck resident was named the suspect in the murders of 14-year-old Robin Edwards and 20-year-old David Knobling in Isle of Wight in 1987, and Terri Howell in Hampton in 1989. Knobling and Edwards' deaths are part of what is commonly known as the Colonial Parkway Murders.

Capt. Timothy Reibel, the commander of the Bureau of Criminal Investigation's Chesapeake field office, acknowledged that nothing can erase the families' pain.

"Today we find co

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