I don't think it will matter whether she has a mental illness or not. I think this case will hinge on physical evidence. If the case is weak enough that the defense can build her past or her mental state into a workable theory, then Kobe will of course be acquitted.
Since this is obvious to me, a person who doesn't even play a district attorney on TV, then I think the DA in Eagle must have some pretty hard core evidence that she was forced and beaten. And if this is so, discrediting her due to mental illness is meaningless. Of course a mentally ill woman can be raped.
I agree with every word you just said. :)