Agree totally. I don't think she - or George - can live with the guilt. I know I couldn't. To me it explains quite a bit of their behavior after Caylee's death. (NOT that I am excusing it.)
Denial is a powerful emotion.
It was time for them to hold Casey accountable long before that. It was Casey’s decision alone to murder her daughter. She can blame her parents all she wants , like she has done her entire life, but that is her way of making her family feel guilty instead of remembering SHE MURDERED HER DAUGHTER!