Personally I've always felt that the DNA evidence was tainted. However, there does seem to have been a lot of evidence not just DNA, that suggested that Rudy Guede was the main instigator in this murder. However, I strongly feel that both Knox and Sollecito were involved or at the very least know information that they are refusing to divulge.
I really feel it's more a fact that the case against Knox and Sollecito was unproven due to the tainted evidence rather than not guilty and with such tainted evidence, there's no chance of a new trial ever producing a conviction. I also find it strange that given that the Prosecutors are going to appeal the decision, why have they let her go back to the USA?? We all know that America ruthlessly pursues the extradition of European or other citizens around the world to the US to stand trial but steadfastly refuse to allow their own citizens to be extradited for crimes such as murder!! Even if a new trial were to take place, or an appeal overturns this decision, the chances of Knox being extradited to Italy are zero.
An interesting fact that an 'expert' on the use of DNA during criminal cases said on Sunday on Sky news I think, that a lot of Courts and people in general put far too much faith in DNA and think because programmes like CSI, Law and Order and programmes of this type always get their murderer because some fandangle machine or procedure has found evidence to support their theory, we all think this happens in real life!!!! I have a feeling this could be true. DNA is a great tool and there have been advances in technology to catch criminals but I think this guy was right, we do tend allow programmes such as these to lull us into a false belief that all crimes can be solved if we use these techniques and it just doesn't happen
On a final note. I feel very sorry for the Kercher family who have shown a great deal of dignity throughout this whole trial and appeal. Unfortunately they are no further forward in believing that at least they have justice for their daughter/sister and this is a double blow.