Unfortunately it's been all speculation since it happened. If you speak with those in the know, you'll know that he's changed his story a few times, shot himself in the foot with his statements, and that should all come out in the trial..... Unfortunately, because of the well known victim and her historical antics, we all assume she has goaded him and invented the rest....
CX must be pretty sure he's guilty to fire him.
We have to wait and hope the truth comes out, if ever.