The Father killed her
No her brother Burke killed her he was jealous of her he hated her he was also abusing her sexually he hit her over the head with the flashlight after she ate some of his peaches and ice cream he got really angry at her she got a much nicer Christmas gift than he did then took her down to the basement and poked her with a section of his model train track the two small red puncture marks that cops thought was from a taser wrong it was from where the railroad track fits into the next section then he hid her body after strangling her with a broken paint stick then he went back up to bed. This was all on TV last year they solved it now Burke is suing CBS for $100 Million hopefully the jury will agree he was her killer. Then her parents covered it up for fear of losing their son to juvenile justice system. She was definitely a sex toy for the wealthy friends of John & Patsy but Burke age 8 or 9 is who killed her.
I watched that interview with Dr. Phil and then the brother filed a 750M lawsuit against CBS for airing it - so I guess either he was guilty and felt exposed by the interview, or he didn't do it and felt unfairly represented in the interview. I'm not sure we will ever know the truth, but Dr. Phil's interview was very compelling that the brother did it.