Thanks for clearing that up. But you have kind of twisted things a bit there. Now you are saying that since any trivial little thing can be a motive, the issue of motive itself is also a trivial little thing such that we can toss in any fanciful nonsense we want, put a tick in the motive box and move onto discuss the blood. What would be nice though, what with it being a murder case and thus quite a serious one, would be a
credible motive. Please turn your mind to that and be warned - any more of this and I will unleash Bill's lack of psychopathology onto you

(funnily enough - this is precisely where that becomes relevant). Is it credible that after six weeks living together Amanda would unbottle the pent-up rage generated by being asked to clean the toilet properly, a rage she had kept entirely to herself, and stab her roommate in the neck? And is it credible that her geeky BF would fall in with her and that the random black guy they did not/barely knew would too? Can we have motives for them too please?
Also, if you are going to be this casual about motive to murder, why can't we apply the same rule to all the other evidence? Why is not credible that they would want to spend 2-3 hours standing around in the Piazza? People stand in piazzas for all kinds of reasons. Maybe they wanted fresh air. And the police too. We can be just as ridiculous in interpreting their actions. Maybe they all wanted to be at the questura that night because a colleague was leaving and they wanted to say goodbye. Etcetera.
Thanks for clearing that up too. However, it seems to me that you still don't go far enough. Lack of evidence of a credible motive (or lack of credible evidence of a motive) is a serious problem for the prosecution. If they had you at pre-trial conferences saying 'hey, don't worry about it, it doesn't matter as it's only a point for the defence' they would have given you strange looks. In real life, motive is very important and this case kind of proves it given all the wacko theories advanced so far - Crini's crap theory (
sic) being the best of a bad bunch so far.
ETA this is my wheelhouse btw. Just wanted to mention that.