While I don't agree with the overall gist of DocG's JDI theory, his best analysis is on the subject of the broken window. Here is the first of four entries he wrote on the subject (
http://solvingjonbenet.blogspot.com/2012/08/clear-evidence-of-staging-basement.html). He analyzes the statements John makes as well as Lou Smit's prompts that help John through the interview.
One of the problems with DocG's window theory is that he relies on JR gaslighting Patsy into falsely remembering doing something that never happened. While this is possible in theory, the devil is in the details.
Patsy could not have helped LHP clean up the glass until she (PR) and the kids returned from vacationing in MI (duh). We don't know the exact date of their return (well, at least I don't) but it's a cinch it was before labor day so the kids wouldn't miss the first day of school.
The glass was supposedly broken anytime from June to July. So, if it really happened (I don't think so) then the glass lay on the floor for anywhere from a few weeks to several weeks. This would have caused irritation for Patsy. Why should she have to come home from vacation and do a job that the housekeeper should have done weeks prior? So if Patsy is having a false memory event she's having it w/o the attendant memory of irritation one would expect had the event actually happened.
IOWs gaslighting is possible but in this instance pretty unlikely given it would be a highly memorable event, not a vague memory. JR would have needed to not only gaslight her about cleaning up the glass, but would have had to gaslight her about the irritation she felt having to do the housekeeper's job immediately upon return from vacation. Patsy says nothing in her police interviews about being put out with Linda for leaving the job for her to do when she got home.
Doc originally had a different explanation of Patsy innocently backing JR's story. That explanation didn't stand up to examination. He then concocted the gaslighting theory. The advantage of the gaslighting theory is that it can't actually be disproven. Many of his readers accept it uncritically. Doc's solution for the case depends very much on Patsy being not only innocent but completely naive. Gaslighting, if one accepts it, maintains a theory he'd already put a lot of very good analysis into. If one doesn't accept gaslighting, then Patsy surely knows the window wasn't broken before the night of the murder. Why she's supporting JR's story is an open question, depending on who you think killed JBR. Rejecting gaslighting would force Doc to rework at least some parts of his overall theory of the case.
I should mention that I think Doc has done a lot of excellent analysis on the case. But I think his gaslighting theory is weak and improbable. The whole event JR describes (JR opening the grate, jumping down, kicking out the window......) is improbable and that the glass lay on the floor for weeks despite the family having a housekeeper is improbable. It would strike Patsy as improbable as well, and thus the gaslighting fails, imo. IOWs that which tends to indicate JR is lying also tends to make gaslightinng improbable, imo.
Again the real benefit for Doc is that gaslighting cannot be disproven. It's not falsifiable.
Another problem with Doc's window theory is that he maintains that the window wasn't sufficiently staged to be believeable as an entry point. I don't think that's really true, but even if I accept that part, I've never been convinced it wouldn't be faster and easier to complete the necessary staging than to pick up the glass. And then of course he has to make the glass disappear which means either he flushed it (risking the noise of flushing the toilet in the basement) or in Doc's theory, he's running around outdoors placing glass in neighbor's trash can risking being spotted.