If JDI, I believe there is enough circumstantial evidence to convict him. But at his current age I doubt he would be imprisoned long before he too died. It would be bittersweet justice. Bitter because if he did it, he would deserve to be imprisoned much longer than he would serve before his death by old age. Sweet because at the least, JonBenet's killer would be identified and convicted. I am in the BDI camp but would be happy to have her murderer brought to light, regardless of who it turns out to be, and I definitely believe it to be RDI. An admission by John would sweeten the conviction but I doubt he would admit to it, which would always leave a small room for doubt. But that is the problem with this case. I think prosecution and conviction would be great, but I also think the killer needs to man up and admit his guilt for any conviction to erase all doubt. I do agree that if JDI then John was the molester the night of the murder, and also responsible for the prior molestation. And if so, Patsy may or may not have known, or perhaps knew and was in denial. There is no reason why Patsy would have had to know the ransom note was fake if she did not write it. But her calling all their friends over immediately after calling police strikes me as her knowing and being complicit in the crime, and as a further attempt at covering up by contaminating the crime scene. So if JDI then I do believe Patsy knew, or at least had suspicions.
SIS
"You can burn the land and boil the sea, but you can't take the sky from me." -Firefly