Ok, I can’t watch the video right now but I’ll take your word for it. Which means the police were still in their cars when the shots were fired, not approaching him, and if he only fired two shots, then he was not actively firing his weapon when the police approached.
I hear where you are coming from, but I know for a fact...they heard those two shots (one a single second before the first cop drove by who I am absolutely certain, given the timing, that they visually saw the guy fire the first shot into his house, and he fired the last one about three seconds before they shot him.
You can see the second cop car stop after the second shot, and within three seconds of the last shot, you see the cop car door open, a cop jumps out and fires shots. Apparently, he yelled at the guy to drop his weapon but fired simultaneously.
I think we all agree that cop made a mistake, but I suspect it wasn’t something to classify as an execution or murder, but a fog of battle with jacked up adrenaline.