Yes, I think brother intentionally bashed his younger sister, the favorite, but instead of crying and being able to escape, she was hit so hard, she lost consciousness, fell and injured her head further.
I remember that analysis from one of the tv programs.i think it was the brother.
Parents covered it up.
Awful!
That scenario makes no sense when you think about it. Your son kills your daughter and the thing you think to do is to put tape on her mouth, make and strangle her with a garrote, molest her with a paint brush and then sit down and write a 3 page ransom note.
Plus dont forget the fact that john found her body. Typical when a family member kills another family member they avoid finding the body themselves.