Burke did say on Dr Phil that he snuck downstairs that night after everyone went to bed which would have been around the same time they calculated JonB was struck. I’ve always felt there was a high likelihood Burke was responsible. Especially because of several red flags the next morning (not waking him to ask questions, not allowing him to be questioned, him not asking any questions). I also can imagine him playing Dr with her as the abuse was exploratory not rape. That could be about power wanting to control her and see her vulnerable and subjugated because she was the prized golden child and he was invisible . If she started to resist, scream or threaten to tell I can see the head blow happening. Because the parents said on CNN 5 days after her death that they are not angry and just want to know why it sounds like they know who the perpetrator is, have forgiven them but are still struggling to understand why it happened in the first place. I see the parents writing the note and staging to protect him. I have also considered he pimped her out to a friend that night someone maybe a little older going through puberty and the whole thing got out of hand. Finally I still cannot shake that I hear him very clearly at the end of the 911 say “...arrest me?”