Thank you for the welcome, Tadpole. Sorry for late reply: with exquisite timing, my broadband packed in more-or-less as soon as I posted!
With regard to the touch DNA, I have to admit to being far less au fait than everyone else on here but a couple of things really bother me about the whole issue:
1. I don't understand how anyone can be cleared on the basis of the DNA alone. I gather there are significant issues with the integrity of the samples and the comparative accuracy of this sort of testing so it seems a little premature to be clearing people on the basis of these samples. I'm not articulating this very well but was DA Lacy essentially saying that someone who ticked all the other evidential boxes would be exonerated on the basis of not ticking the DNA box? This, to me, is akin to a case over here where suspects in the serial killing of prostitutes were eliminated on the basis of their regional accent (leading to at least one avoidable death).
As I say, I am nowhere near as expert on this case or on DNA as the rest of you and I'd love to hear more informed views than my own.
2. If the DNA is that of the murderer, you have to marvel at the blamelessness of his life before and after the JonBenet murder that he hasn't shown up on any DNA database for another offence. This would seem to eliminate paedophiles and career criminals so the cast of people who could have done this crime is actually really small.
I imagine you are all thinking I'm an idiot. I'm anxious to learn, though!