Best I can tell from the video 6-7 (2 of the shots were right on top of each other) shots were fired and all at his torso. I am not sure the argument can be made that the officers thought he was alive, or conscious, or in control enough to obey new commands after being shot like that. Not checking for a pulse could go either way on helping the officers case or be used against them.
I am still back to the same conclusion. *After* firing several times they then shot him with beanbags with no response, then they sent the dog in and got no response, then said "he's good," but still said right after "step on that hand real hard," then they moved in to cuff him once motionless, looked for the knife (knives, there may have been another thrown,) and told each other "good job." The video ends but I heard no calls for medical aid, that could be construed as they knew he was dead and it was congratulations time. BTW, there is blood on his back and the rock next to the body.
In this case I see enough evidence to charge these officers with murder. Granted the suspect did not drop all his knives (or the one remaining) but he also did not charge them, seems to me the beanbag shots and perhaps use of the dog would have been the way to deescalate the situation. But, they decided to fire first. This is going to be a tough one for the officers to defend.