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Photographer, why he was inside the building, trying to get a scoop on the suspect? and he said, no, that's my son. i thought, oh, geez. homer told him -- >> they detained him and impounded my car for littering. they detained him for littering is what he said. i said that doesn't sound right. i said littering? he said, yeah, he was driving over this bridge and stopped to throw some garbage and they rushed him and stopped him. at that point i said, homer, i don't think you need to talk to me anymore. >> we asked wayne williams about throwing garbage off the bridge. he denied his father ever sai...

And then this odd circumstance about one woman dying of natural causes in one of the homes and four other homes with dead people in each one. does this mat earn tell you anything or is there going to be an extremely long investigative process? >> it could be a long one. it will take a while to put it together and a number of agencies have to work together because these are rural counties. you're not going to have the array of crime scene investigators, evidence technicians to process all of these crime scenes simultaneously unless you get help from neighboring counties, the state police and ma...

Never said it. >> while father and son were inside the fbi, evidence technicians were combing the williams' home. the fbi's top fiber expert, harold dedman, led the search. in wayne's bedroom he took clippings from a purple bedspread and from a yellow blanket. >> your blanket was located under wayne williams' bed. >> on the floor, a green carpet. this is a blow-up of those carpet fibers. >> they're the only company to produce a fiber like this. >> but larry peterson was still in the dark. >> i had no idea there was a bridge incident. >> he had been called to the fbi office to help search this ...

Imagine. they probably went out and decide they were going to go get high and party a little bit. and she just got in the wrong car. >> i think they were friends, and at one point, they were picked up together, and one saw the horror of the other one dying. >> evidence technicians working fast and in difficult conditions performed a minor miracle by retrieving a print from the victim's skin. later, computer technology enhanced the print and proved jose castillon was the killer. the tire impression, too, was an almost perfect specimen. >> i think that if you tried a thousand times to duplicate ...

Evidence technicians found three fingerprints on the outside of the screen's frame. >> the prints themselves were very fresh in this particular case on that particular screen, they were very distinct prints. >> but these fingerprints could have been left by anyone. dozens of people had been in and around the house. >> this was a busy household just like many of our households. there were hundreds of prints throughout the house. >> it was a process that would take day, perhaps weeks. and they were no closer to finding heather. >> what happened to heather dawn church became the mystery for this ...