This scenario would explain
a: the extremely tight almost unbelievable timeline
b: the ridiculous panicky drive bys/attempted parks past the house/in immediate neighbourhood between 3.29am and 4.04am
This scenario is premised on my speculations that emotional meltdown/investment overtook booksmarts for BK on the morning of the murders.
BK's Car (Suspect 1 Car) is recorded driving on past at 4.04am after attempting to park/uturn. if we speculate he parked immediately after this, somewhere down road from the house, how long would that take? I'm saying at least 2 mins. So that takes us to 4.06am at a minimum. Getting out, walking to house, going to slider, entering house, I'm saying that would take at least 2 mins. That takes us to 4.08am. Now I don't think he could have been inside the house until at least 4.08am but it COULD have been later, so conservatively I'm speculating 4.08 to 4.12 am. We know from neighbour CCTV audio immediately adjacent to X/E room that at 4.17am there is a thump, we know that street camera/cctv/ring has BK (Suspect Car 1) leaving street (which street is not specified) at 4.20 am. Everything DM hears and sees appears to happen after 4am up until she sees BK heading towards her, and then PCA evidence suggests he left. I give him 3 mins minimum to leave, get back in his car, start it and drive away, which means he probably exited house at 4.17am immediately after the thump. To my mind it is entirely possible that BK spent only 5 - 9 minutes in the house IMO - 4.08am-4.12am to 4.17am. IMO, Perhaps with 9 mins he could murder all four. Even perhaps with 7 mins (arrival time 4.10am), but not with 5 mins IMO.
I want to combine the above with consideration of the gap in timeline that exists, AT PRESENT. that is between 2.53am when Suspect Car 1 is caught leaving Pullman by camera, and 3.29am when Suspect Car 1 is first caught by cameras doing ridiculous drive bys/uturn in immediate neighbourhood of house. The drive bys have this desperate/panicky quality of the emotionally unhinged and deeply invested. Could this emotional meltdown quality be related to a sense of lost control? What triggered that? What triggered a ridiculous lack caution? My mind goes to the sheath. I think BK could have been looking to collect his sheath, which he had already accidently left behind earlier in the 3rd floor room.MOO.
Speculation only based on what is not in the PCA timeline: Sometime at say 3am, or just afterwards, BK parked in pre-prepared spot, out of neighborhood, as per plan, as per awareness of cameras and risk of car being caught in the actual street of the target house/individuals, walked unseen to house, entered unseen and unheard, went to third floor, murdered K/M (as per plan), dropped sheath (as NOT per plan), left unseen and unheard (as per plan) and reutuned to car. It is now, say, around 3.20/3.25am when back at his car BK notices the sheath is gone. Plans went to nothing, loss of control, horrors, no caution. Cue evidence between 3.29am and 4.20am as outlined in PCA...
Ofcouse, it's likely LE didn't collect Camera footage on all possible routes between Pullman and King street neighbourbood between 2.53am and 3.29am on morning of November 13th so I do realise this must remain as total speculation. I just think it would explain in a logical sense the tight timeline and BK's ridiculous driving behaviour between 3.29am and 4.20am. MOO