Wow, thank you for sharing this. First off, this is even more disturbing because this kid looks exactly like my little cousin at that age! Yikes...
I have a lot of questions about this kid and her parents/childhood. People don't develop memories until they can symbolize via language. This does not mean they don't remember things, it just means that they don't consciously remember incidents in a way where they may be able to verbalize and articulate them at a later age. No doubt that they are still in the deep recesses of the mind.
That being said, I have to wonder if the molestation claims are in fact related to the bio dad or current dad. I know this is a horrible thing to think/say, but she was adopted so young it's difficult for me to believe she has such vivid memories. No doubt she is a veryintelligent child, but I am skeptical. She did start to make significant improvement when she left the home. Once again, this is just my preliminary opinion based on VERY little information.
I also noticed a lot of leading questions being presented to this child. I always worry about suggestability with kids. However, chalk up even 1/2 of this info to suggestion, etc., and that's still a pretty messed up and scary kid.