I have this sick feeling in the pit of my stomach that Vinnie and I are on the same page and we just might be right. I can totally see KC taking the stand and "admitting" Caylee drowned in the pool, however, GA was not there. In her panic, she imagined the entire scenario as it would have occurred if her parents knew that, because of her negligence, their precious granddaughter had died. Her mother had accused her of being 'unfit', her dad had a violent temper and was a strict disciplinarian and even her brother had joined forces with Mom, acting as if he didn't trust her to take proper care of Caylee. She might even say Caylee was having a fit to get in the pool, so she let her and only turned her eyes away for a second to make or answer a phone call. She was petrified at the thought of what her mother would say to her and what her father would do to her and she knew they would NEVER FORGIVE HER. Everyone in her family had already turned against her so she knew exactly what their reaction would be and couldn't face it, partly due to her own guilt "I can never forgive myself". She lied because she couldn't bring herself to deal with the horrible truth that Caylee was dead, so she created a new reality....a new truth.
When you think about it, JB doesn't have to prove that any of the stuff in his opening statement was actually true....only that it was true in KC's mind. I just don't know how RK fits into this scenario, but then, maybe he doesn't have to.