Well, I finally watched the video, expecting some type of epiphany, but instead I saw a time stamp over a very important part of the video. A car roll up, a chair with half a person in it rolling backwards, who then stood up as the chair continued backwards. The cops are now behind the time stamp (about 15-20 feet away from the person standing), I sure hope they can remove that. The shootee is standing there, not moving forward, or backwards as far as I can tell, and appx 4 seconds later he bends at the middle and drops to the ground.
I am sure that the investigation will show there was probable cause to shoot him, knife, <21ft away, aggressive posture, etc. They can come up with a ton of reasons. If it is anything like Spokane, they don't even get interviewed about it for at least 48 hours. Lots of time to "replay" it in their heads to solidify their story. After all, you don't want them telling one story one day, and another the next.
But as someone has already said, the trouble won't come from shooting the guy, it will be from the lies about it in the first place.
bob