It seems like there is quite a difference between the defense of Knox and Sollecito. All he had to do was distance himself from Knox's proclamations, and refute the knife/clasp evidence. The knife evidence is refuted as it's a small speck in an irregular place that could be doubted.. without confirmatory evidence, it is weak. The clasp evidence is easy to question because it was not collected for 46 days, but that doesn't mean it isn't valid (that question of whether overturning the verdict will result in the perception of innocence).
Knox has to argue that the knife with her DNA embedded in the handle is irrelevant, the absence of prints throughout the cottage is normal, her strange behaviour and activities is meaningless, her irregular remarks (Meredith routinely locked her bedroom) were a translation error, that she was coerced after 1.5 hours to sign a statement confirming verbal testimony that was a result of torture, and that she has every intention of making amends for her false accusation conviction ... when she gets around to it ... compensating her victim is apparently problematic for Knox.
Otto, this is what I was saying yesterday. Anyone, even untrained in the law, can tell that Raffaele has a much better case than Amanda, based on the forensic evidence. Now, circumstantial I don't know, but I would guess he has a better circumstantial case too since he didn't accuse an innocent man and he seems to have kept more quiet than Amanda. Plus it was not his house - meaning it was Amanda's house, she would have had to have given the access if it was not a real burglary. I think Amanda has a much worse case than Raffaele - Raffaele being sort of having built-in excuse since he did not live there, he would not have had the key to open the door for anyone.
All he had to do was distance himself from Amanda.
I'm not sayiing it would have worked, what I'm saying is that he would have at least had a chance this way.
So why did he not do that?
Why stick with Amanda, even to your own detriment (as we see it from the outside)?
This is just like Interrogations - Part Deux.
Because he did not want Amanda to suddenly change her course, and reveal Raffaele's involvment in the whole thing.
He decided it was best to "stick together" so there was no chance of her turning on him, of her changing her defense, of her revealing his involvement.
He decided best course is to keep with the Plan they had developed in the very beginning - to stick together and be each other's alibi.