If Derek truly wants to help Brittney and he knows more about that side of the family than what has already been told to LE, the best thing he can do is work a deal with LE and tell ANYTHING AND EVERYTHING, I mean down to every time he knows they jaywalked. The more charges and the more years behind bars for each and every one of them means more pressure. Eventually, the pressure will get to them. I just hope it's before they're already sentenced to lifetimes behind bars so that answers can be learned. We know for a fact that Derek had nothing to do with Brittney as he was in jail, so I would start there.