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Testings but touch dna, they can analyze one or two cells of shedded skin or cells. whereas you would need 15 to 20 in the regular kind of dna. so this technique which i'm assuming they used on the saliva in this case is extraordinary. the technology is amazing. the fact they were able to do that and it wasn't burnt in the fire is quite a good thing. >> this is a big break for investigators. >> it's a huge break for investigators because that dna obviously, if he's in the database which apparently he was, now in many states and under federal law since 1999 if you are incarcerated in a federal ...

Pieces to this puzzle. part of it is the autopsy. we do know that mr. scott was hit five times in the back. whether there was a video or not, that evidence exists. and quite frankly, using lethal force when your life is not in jeopardy is something that police are supposed to be trained not to do. >> let's just suggest for a moment, if the officer in this case was suggesting his life was in danger and he suggested to his dispatch that the victim -- he used the words "grabbed by taser," will there be a significant amount of dna of the victim on the taser if that happened? >> probably not. this ...

The whole house was searched, anything for weapons, the whole house was fingerprinted. dna swabs, any kind of blood or anything for touch dna was swabbed in that house. >> but investigators found nothing, no murder weapon, bloody clothing or any other evidence of the crime. inside michael's truck, however, investigators found a hidden compartment under the back seat. there they found a treasure trove of forensic evidence. >> michael ratley's truck turned out to be the jackpot, if you will, for our case. >> it was almost like it was packaged for them to find because it was just that easy. >> th...

>> i did look for the presence of blood on that bathrobe, but i did not find any. i was surprised. the whole house was searched, anything for weapons, the whole house was fingerprinted. dna swabs, any kind of blood or anything for touch dna was swabbed in that house. >> but investigators found nothing, no murder weapon, bloody clothing or any other evidence of the crime. inside michael's truck, however, investigators found a hidden compartment under the back seat. there they found a treasure trove of forensic evidence. >> michael ratley's truck turned out to be the jackpot, if you will, for ou...

Something here. they felt that something was going on. that's why they reached this conclusion. and this dna, this touch dna that cleared the ramseys, according to the district attorney, later in 2000, this was virtually unknown at the time that this crime took place. and since then, a lot of forensic scholars have talked an awful lot about how you collect these very fine samples of cells and how you keep them from being contaminated and how you process them. the boulder police department was highly criticized for the general police work they did, let alone specific work like that. >> it is ex...