OK, mama, excellent suggestion. This one's for you:
1. Foundation: John lied about breaking the basement window prior to the night of the crime. (See my four posts dealing with the basement window, beginning
here.
2. Foothills: The only reason for such a lie would be to point away from his breaking that same window ON the night of the crime to stage a breakin consistent with the kidnap staging in the "ransom" note, which he must also have been, at the very least, aware of.
3. Halfway there: This tells us we are dealing with an inside job, which in turn tells us there was no intruder, which in turn tells us that all the so-called intruder evidence, including the vaunted DNA is garbage and can be tossed.
4. Almost there: So. At this point we know John is involved, but what about Patsy? Well, Patsy was the one who called the cops, which undermined the staging in the note. If she'd written the note or been part of the coverup she wouldn't have called the police so early.
And hence: Patsy is not involved. If you want to argue that John is the one who told her to call, that makes no sense because we already know (see #1) that he lied about the window, which tells us he'd been staging a breakin the night of the murder but needed more time to complete it, so would not have wanted the cops called in so soon. It also stands to reason he'd have known about the phoney note and the body hidden in the basement or he wouldn't have bothered staging at the window.
[I'm editing here because there is a much simpler version of step 4: If both John and Patsy were in on the coverup together, the 911 call would not have been made, because by calling the police so early, with the body still in the house, the kidnap staging would have been totally undermined. We already know from step 2 that John was involved --
and hence, Patsy, who after all is the one who made the call, must be innocent.]
5. Finally there: John and only John murdered JonBenet, staging the kidnapping to cover his own behind.
You'll notice that I've left Burke out of this picture. That's because I see no reason for John to take such a huge risk to cover for Burke, who would not have been prosecutable anyhow because of his age. Also, if Burke was the one who struck that blow, it could easily have been reported as an accident. Oh wait, no it couldn't, because of the vaginal injuries. And sorry, but the only adult male in that house is far more likely to have inflicted those injuries than 9 year old Burke. And if that mature male would want to argue in court that he was only covering for his son, then let him. I'll leave it to you to guess if any jury would believe such a story. So why should we?