are they going to answer the questions about how he got into the house? and what did he do, get Patsy to write the ransom note? and on and on. if this guy really did it - they are going to have to explain every aspect of how the crime was committed - how the house was entered, the note, the ransom details (which were false, since the child was dead), the practice note, and on and on.
I'm guessing since this guy admitted guilt to some of the crime that means he described how he got in the home or something like that no one else would know but the perp who did the crime.