Male DNA found underneath her fingernails and in the blood in her panties has been proven without a doubt to not be John or Burke Ramsey's DNA. No matter how screwed up the crime scene was this evidence is clear proof and it points away from John and Burke.
The problem with this whole case is that too many people think they know all the facts and they really don't know even a fraction of the facts. I believe the police have not helped because they have kept the suspicion up against the Ramseys while they have tried to cover up the mess that they, the police, made out of this investigation.
Perhaps one day the cold case guys will solve it.
Personally, I think the DA and police were the leaks to the media that allowed the brother to be slandered along with the rest of the family so as to cover up their own ineptitude and cast blame at easy targets.
I remember the case and how often stats were being thrown out like darts at the family, any evidence that could clear the family was deemed irrelevent, any thing that could condemnt then was front page.
If you remember, the media (through a leak which I personally think came from the DA) implied that evidence has been doctored or screwed with or maybe screwed with since the officers at the scene had not properly secured or searched the house or area giving the family and guests time to do things.
It was one of the most nasty insinuations I have ever seen in my life, and should have resulted in a lawsuit right then and there.