In the PCA, LE brings BK into the narrative around 2:45 am on Nov. 13, in Pullman, on campus and turning off his phone before heading toward 270, which leads to Moscow. Based on that, I sort of had a picture of BK being in his apartment up until then, which made me question how he would know what was going on at the King Rd house, unless there was an online element we don't know about.
But, then AT stated that BK was out driving around late on the 12th and early on the 13th. One could argue that if this is truly what BK was doing, it doesn't mean it was related to the murders, but I feel like AT inserting the part about him driving late on the 12th might suggest BK needed an alibi for something that occurred on the 12th, as well. JMO.
Since we don't know anything about camera or phone data from late on the 12th, we have no idea where he was, but that data would have likely been collected during the investigation and is well known to the State and the D by now. What we do know is that he was back in Pullman around 2:45 am on the 13th, turning off his phone, and heading in the direction of Moscow.
This is JMO, but it seems awfully suspicious to me that he was likely driving around during the hours that the victims were out and about on the 12th, then we have this void of 45 min to 1 hour between when the victims all got home around 1:45/2 am and when BK was in Pullman (after supposedly already being out driving), turning off his phone and heading in the direction of Moscow, out for another drive. Really? I mean, I can only take a guess, but the fact that AT includes late on the 12th in with early on the 13th for his driving around hints that there might be evidence regarding BK/his phone/his elantra/whatever in Moscow late on the 12th. JMO.
Wild speculation, but I think he was in Moscow late on the 12th, knew when they were all home (or heading home) and maybe saw an opportunity or otherwise made the decision about the time being right. He could have been back to Pullman by 2 or 2:15 (or earlier, depending on what he was doing) and still had a half hour (at least) to do whatever he needed to do and be where he was on campus by 2:45. Let's not forget the unaccounted for time between leaving Pullman and the first camera footage we know of just before 3:30 going west on Indian Hills and then Styner (and yes, I'm willing to assume for now these are all the same white elantra as the one in Pullman). I think when he went back to Pullman, he got some things, and then drove someplace remote somewhere east of Moscow to finish getting ready. IDK, he could have had other reasons he went east during that time gap. We have no way of knowing. Anyway, that's the picture I have now...