Forgive me as I'm an infrequent visitor to these forums but I can only assume that your status as "Verified Attorney" indicates you are indeed a practicing lawyer. Whilst I respect your opinion as a legal practitioner, I have to disagree with much of the content in the above post.
You find it hard to believe that someone who seemed "fine" only hours before is/was capable of attempting self harm but yet we see it literally every single day. How often do you hear of a high profile suicide where friends and family express their dismay at the fact that the victim displayed no outward signs that they were contemplating ending their life? So often it happens after a person has seemingly overcome previous obstacles, I do not speak lightly of this as members of my own family have committed suicide but the facts remain that someone who appears outwardly happy is more than capable of ending their life. I would bet my last dollar that this will be thoroughly addressed by the forensic psychiatrist when they are called to give evidence.
You are correct in saying there is no physiological evidence to suggest that Allison jumped but is it also fair to say there is also no physiological evidence that she was the victim of a homicide? Of course this doesn't exclude either scenario, indeed barring an accident one of the scenarios did in fact occur but in my mind there is tremendous doubt, at least from a legal point of view.
While I'm sure the prosecution would have expected the defence to call certain witnesses after the rejection of their no case submission last night, I can't imagine that they would have been delighted at the prospect and when GBC elected to give evidence there would have been a collective groan throughout the prosecution team. Byrne QC is not an idiot, he knows the prosecution case is extremely weak (as evidenced by the submission yesterday afternoon, which I don't believe was without merit) and there is not a chance that he would risk the strong position of the defence if he wasn't confident that GBC and other defence witnesses could further strengthen their position.
As I've said previously, I have a strong opinion on this matter but purely from an unbiased perspective I believe the prosecution are up the creek without a paddle at this point