rsbm
That is a really good point. As of 8/21 LE may not have known about the Alder Hill video archive. And that is despite Placer County Fire being on the investigative team starting 8/12, and OES being on the team as of 8/8.
I hope that is not true because if it is, what an incredible waste of searching time and unnecessary anguish for the family. So instead, I hope LE was aware of the video and dismissed it as immaterial upon closer analysis. Pollyanna perhaps?
I am keeping in mind what @Curiousa20 pointed out last night - that those operating these cameras have much higher resolution available to them. And the FBI, in particular, would have expert videographers to analyze that better footage.
I am not dismissing the possibility what we are all seeing in the lower resolution video is KR's car going into the lake. But like I always do, I analyze the context of all the variables to figure out if something is a good fit with any theory.
IOW, does it make sense LE did not know about this video early on? And if it was material, they did not inform the family?