Regardless of what actually happened and who did what, when it comes to sexual molestation, the only mature male in the home is by far the most likely suspect as far as the justice system is concerned. When we combine this with all the excellent evidence Kolar has revealed, demolishing any possible intruder theory, then we see very clearly that John Ramsey should, at the very least, be brought before a Grand Jury. The jury would then decide whether to indict him for the sexual molestation of a minor, and/or murder one.
This is the ONLY possible path to a conviction, and also the only possible path if we want to learn what actually happened. Since there is no direct evidence linking Burke to the crime, and there IS direct evidence linking John (his obvious lies about breaking the window at an earlier time, which tell us that he must have broken it the night of the crime), I see no point in going after Burke, who couldn't be indicted anyhow.
Once compelled to testify before a Grand Jury, John would have no choice but to either insist that an intruder was present, or fess up, confess to his complicity, and offer his version of what happened the night of the murder. If Burke is the one who killed JonBenet, then this is our only chance of learning about that. And if John is the one who killed her, and Burke is innocent, then if John wanted to claim he was only covering for Burke, the burden of proof would be on him. And of course Burke could be called to the stand and it would be very interesting to learn what he would say to such an accusation.
So. If you really want to learn the truth and see justice done, regardless of who your favorite perp is, you should be focusing your attention on John, NOT Burke, NOT Patsy.