Nonexistent, and of course they go over the technique. there was a footprint, the prosecution says they found at the crime scene that matched amanda knox's, and they sprayed it with luminol, that when it interacts with blood, it glows, and they said that was amanda knox's. the defense said, wait a minute, if you put it on detergent, on rust, on fruit juice, it also glows. so to say that is blood is very far reaching. the key here is the analysis from this independent council saying you cannot trust this dna, and the question of whether amanda knox's statements where she said she was at the cri...