discovered a vial of his blood. it was entered into the fbidna database. how likely is it now that police will be able to reopen some cold cases linked to gacy? could it apply other cold cases? let's bring in forensic pathologist, michael baden and mary o'toole, author of, dangerous instincts. dr. baden, explain, i automatically assumed that a serial killer's dna would be in the dna database. and it wasn't? >> the dna database which is federally governed by the fbi and contains millions of inputs, each state sets its own standards on what to submit to the, to the database, code dis. -- codis. at the time that gacy was killing people in 1978, was