`` This has the potential to help bring closure to victims ' families who have gone so long without knowing what happened to their loved ones , '' Dart said . A legal amendment allows DNA of executed killers to be added to the FBI database . An FBI detective hopes DNA will reveal additional John Wayne Gacy victims . He was convicted in 1994 of killing young men and boys in the Chicago area . He was executed in 1994 , before the national FBI database was created .
A legal amendment allows DNA of executed killers to be added to the FBI database . An FBI detective hopes DNA will reveal additional John Wayne Gacy victims . He was convicted in 1994 of killing young men and boys in the Chicago area . He was executed in 1994 , before the national FBI database was created .