I’d much rather sequence the genomes of the Whites + anybody who was connected to them in some way.But if he did not know that he did it, then there would be nothing incriminating that he could say, is there?
Lets think about it.
If it was only an accident caused by Burke. He hit her in his fit of anger, not meaning to kill her. He was a 9-year old boy who saw his sister collapsing on the floor. He must have been shocked and afraid after he saw it, right? His sister was unconscious on the floor after all, and did not respond anymore. After he possibly tried to wake her up by calling her name and poking/shaking her, he must have at some point called out for his parents to come and help him. John and Patsy arrived and rushed to assist and deal with JB. They must have asked Burke (because a parent would want to now what happened) about what happened and Burke had no reason to hide the truth as it was obvious to everyone that something bad had happened - he told them he had hit her hard on the head. Patsy and John were now panicking, trying to help JB and wake her up, and did not have the time to attend to Burke who would have been standing right by there in shock and crying because of all that was happening around him. So I see that he was possibly sent away to bed so that Patsy and John could concentrate on helping Jonbenet.
It is all possible, isn't it? I sure have acted this way as a parent. When one of my kids fell down from a bunk-bed a few years ago it resulted in him biting into his lip as he fell, and there was a whole lot of blood. I rushed to the room as he and his siblings were crying there to see what had happened, and two of my other kids (I have 4 by the way) started anxiously explaining to me what had happened and how they did not see or could not do anything to help and that it was an accident. As I was attending to my child who was hurt I was not able to attend to my other two who were standing there crying and panicking and I asked them to go away from that room so that I had my full attention to the child that needed me the most in that moment. After the situation was solved and myself too calmed down a bit, I went down and talked to my other kids about it all and I was able to comfort them again. It is logical, right?
So, after they possibly had sent Burke away to his room, for the same reasons I just explained, he could have just spent the night in his room sleeping. It is a possibility, right?
If he spent the rest of the night in his room, then there is a possibility that he did not know about anything that had happened later in the night.
He possibly did not know about the cover up/staging taking place down in the basement and was hoping, just like a kid would do, that everything will be okay again in the morning. Kids would think that in stressful situations, hoping that their parents would come and fix whatever had happened. He possibly could have been afraid to leave his room to check if everything was okay, and just stayed in his bed waiting for someone to come to talk to him. Just like he said he did in his interviews. And possibly, John did come to his room early in the morning (after the staging and cover up was done and before 911 call was made), waking him up and told him simply something along the lines of "JonBenet woke up later (after that accident) and all was fine with her. We all went to bed soon after you did, but something bad happened in the middle of the night - someone broke in to our house and kidnapped Jonbenet." - Just like has said in his interviews.
He was a 9-year-old child and would have believed his parents. He came downstairs when he heard his mom "getting into the role to make a 9-1-1 call. "Going psycho" - just like he said in his interviews. He heard Patsy telling the phrase: "Just found a note..." to the 9-1-1 operator, and he genuinely asked his father: "What did you find?" (just like it has been stated to have been heard on the enhanced version of the 911 call), because he did not know anything about any note. John then replied to him: "We're not/I'm not speaking to you." (like it is supposedly have been heard on the enhanced version of the 911 call), because they weren't speaking to him but to an operator. He was possibly sent back to bed and told to stay there until they will come there to get him. And he did so.
There was no "coaching" needed at all if he did not know of anything. All they had to tell Burke was along the lines of: "You are not allowed to ever talk to anyone about the accident that happened the night before." and that is it. There was nothing for John or Patsy to be afraid of because he just could not have said anything incriminating other than about the accident that happened on the night before.
Maybe even making him promise that he never will, because a "promise" means a lot for a child. He was seen by detectives that morning being distraught and crying - just like you would expect from a child who has been told that his sister was kidnapped.
Now where would you want that child to be? At home where there are a lot of police and other people around and where he could still tell someone about the "accident" or ask questions that they did not want to be asked? Or would you send that child away from that all to a friends house where he can be occupied playing his Nintendo and probably will not even think about it much.
But I somehow do still think that while at the Whites, he did say something there that made the Whites doubt about what was actually going on and they started to put the puzzle pieces together. Maybe something along the lines of "JB did ..... and I got angry at her and hit her, but my parents told me that she was fine anyway after that." And I see all that to be the reason behind the Whites behavior and their falling out later.
Now I know that there are lot of "what if's" in here, and after all it is just my opinion not at all a fact, but I believe it simply because it, IMO, explains a lot of things that many other theories do not explain.
I guess we all have our favourite suspects…