I am sure you have seen the long lists of evidence printed on the internet and in this thread as well. The media campaign that is going on all goes back to the Knox family and their hired propaganda team. People just love innocent and entertainment. It is pretty sad. The knife and bra clasp is not the only evidence but how come it is being reported like that? If you try to be objective for a moment then you see that a little criticism about the media reporting is in its place here.
For as far as I can tell now, the independent experts are not doing the defense any favors. It is just way over the top. They are practically criticizing every part of the investigation and that was not their assignment. I would have expected a far more cautious approach and not insult the whole investigation including the legal system because after all many judges have already looked at this case as well. This is going to backfire on the defense IMO. On the other hand, it is a bit premature to really say where all of this is going