On another topic, in response to the question on why BK would have knowingly driven his own car on the night of the murders, and JMO...
I don't think BK cared overmuch about his car being captured on video going by video cameras that night, because he went to a lot of effort ahead of time to thwart LE in being able to easily identify his car.
Nor do I think he was worried about his face being seen.
And he was right not to worry too much, because LE never got his face on camera nor a shot of his license plate, AFAIK, and had to go to some effort to identify the white sedan as his car in another way, in the end.
Those white sedans are ubiquitous.
There was no front plate and the back plate could have been obscured. It could have been muddy as OP pointed out a ways back on this thread.
There's a dark tinted plastic convex cover that goes over a license plate so the numbers/letters can't easily be seen to the naked eye that I've seen on cars with Quebec license plates, I guess it's a thing there. And I think I heard LE tried to have them banned, and they lost, so people still drive around with their license plate obscured by a dark tinted cover. So the point is there are a number of ways to obscure a license plate.
The image of a car going by in the dark is inherently very blurry from what I saw of images of the white sedan early on.
His car could also have tin win (dark tinted windows) that would make it difficult to see who was driving no less be able to identify them. I don't recall if his Elantra had tin win, but if so, it's yet another factor at play that would have obscured identification of him as the driver.
IIRC, the FBI had an entire team dedicated to reviewing video footage, and their top expert in the country at identifying makes and models of vehicles from video reviewing thousands of hours of video.
That was some dedicated manpower, and it still took them awhile to narrow it down to an Elantra, and even then, IIRC, LE said there were 18,000 or so white Elantras registered in Idaho when they started their search.
And at the time BK's wasn't even registered in Idaho but PA, so id'ing his vehicle was even more like finding a needle in a haystack.
Which, IIRC, they were only finally able to do, by going to an out-of-state university's campus security or police, and asking them to search for white Elantras registered to one of several thousand students.
So even if his car was recorded going by, turning around, etc. that night, "here, there, and everywhere", (coming and going from Moscow and Pullman and their neighborhood) that whole set of circumstances would make it extremely difficult for them to identify one of many random white cars as his car, which IMO, he knew full well.
Just like keeping his phone with him was I think like a security blanket for him so he disabled tracking and turned it on and off instead of leaving it at home, he needed the security of driving his own car so he obscured it as much as possible from being easily identified.
In both cases, he took his chances, and bet against the odds, and lost.
Or maybe he wanted to get caught, but didn't want to make it easy, as in catch me if you can.
JMO