Admittingly, I need to go back and read the last ten pages to catch up. But... here are my thoughts...
I agree with the premise that on 11/22, Kelsey was shopping for a dish to take elsewhere. Was this dish the cinnamon rolls I keep hearing about? That tells me she was alive some time (to prepare, cook and remove from oven) after PF was initially spotted at her house (was it between 12:30 and 1?)…
Didn't KB's mother say that KB was intending to go out for dinner with PF that evening? My guess is KB was under the impression that she and PF had Thanksgiving dinner plans. Is this the same dinner where PF is rumored to have said he broke up with KB at the beginning of the year? Was this his explanation for why she wasn't there at the dinner?
Lastly, about the R's interview. Could it be the Rs never gave a specific date for their ultimatum, other than "two weeks before" which would put their ultimatum around December 2nd, when the case first exploded? I think the reporter is just trying to cover up her own reporting mistakes. I believe the reporter surmised the date of 11/26 without confirming it with the Rs and went with it.
I think KK was there at the murder scene. No doubt in my mind. I think she may've done it herself without PF even there. PF soliciting and ordering the murder is what gives him the murder charges.
I remember a Lifetime movie about a teacher who had her students kill her husband. She was not at the scene, but I swear her sentence was longer than the 18 year old students who did the killing.