The show made a compelling case of Burkes guilt. First it was the 911 call and what the mom said before hanging up followed by Burkes interview by a child psychologist when he was 9 or 10 where Burke was taunting the shrink about a secret he can't tell.  BTW the ransom note is just plain stupid, written by someone who thought they were clever.  What I can't believe is the mom not calling an ambulance even if she thought the girl was dead.  Pretty cold hearted if you ask me.