DNA comparisons on the exhumed body of `` victim No . 19 '' positively identified him as William George Bundy , who was reported missing in October 1976 . A legal loophole allows DNA of executed killers to be added to the Gacy database . An Chicago detective hopes DNA will reveal additional William George Bundy victims . Gacy was convicted in 1994 of killing 33 men and boys in the Illinois area . He was executed in 1994 , before the national DNA database was created .
A legal loophole allows DNA of executed killers to be added to the Gacy database . An Chicago detective hopes DNA will reveal additional William George Bundy victims . Gacy was convicted in 1994 of killing 33 men and boys in the Illinois area . He was executed in 1994 , before the national DNA database was created .