I haven’t watched any of the recent TV coverage, but it has always been obvious that it was either the father, mother or brother. Brother makes the most sense. Mother wrote the fake ransom note. I cannot understand how some parents shield a murderous child.
My theory is that she died accidentally, perhaps from horsing around with the brother. Which could explain why the parents shielded the brother.
I also have not watched Dr. Phil or any recent TV programs about this case. Based on what I remember at the time of the murder, I've always felt she was killed by someone in the family. If it was an intruder, why would you write a ransom note, then leave the body in the house? Wouldn't you hide the body somewhere else, and hope it wasn't found until after the ransom was paid? Also, the parents refused to speak with the police. I remember seeing an interview with the father of Polly Klaas. He said he couldn't understand why the Ramseys would refuse to cooperate with the police if it was an intruder. He further stated that when his own daughter was abducted and killed, he spoke with the police on a daily basis, telling them everything he could possibly think of that might help them solve the case. The Ramseys also each hired a publicist to speak to the press for them. Who does that?