Virginia police identify suspect in 3 cold-case homicides from the 1980s, including victims of the "Colonial Parkway Murders"

Police identify suspect as Alan W. Wilmer Sr. , but offer few details about how he's tied to the killings or when he became a suspect.

Wilmer was not a convicted felon, which meant his DNA was not in any law enforcement databases.

The " Colonial Parkway Murders " involved the deaths of three couples and the suspected death of a fourth couple whose bodies were never recovered.

Investigators say they legally obtained Wilmer 's DNA after his death.

Anyone who knew or worked with Wilmer is encouraged to contact the FBI by calling 1-800 -CALL-FBI or submitting a tip online at www.tips.fbi.gov. for more features..