You don't have to be a cop to see the video of the shooting, what happened is obvious.
Supposedly they're hired and trained for their ability to make split second decisions as part of their job.
Lets face it: they had no idea if the guy had a gun or not. Going by the video you can't see that well. They just assumed he had one and fired by default. And yeah the call in said there was shooting but so what? The SWAT guys know all about swatting these days. They couldn't check things out to make sure? Or at least wait until they, you know, actually saw a gun to start blasting?
you're leaving out an important fact...the cops asked him to keep his hands in the air...he did but then brought them back down...in these type of situations, even if you're innocent you need to obey the commands given to you...imagine if you were a cop in an unknown possible hostage situation and you see a guy raise his hands and then bring them back down...like I said split second decisions...now I do think police should be trained to go for leg or non-kill shots but that's another story