The cops had a legal, and ethical, and moral right to arrest the guy. The cops were never in the wrong, and the shooter was never in the right. Arrest is not conviction, arrest is arrest. Once the cops decide you're going to be arrested, you have no other real choice than to go along with it. This guy will be found guilty of murder, and assuming it was a gun he had under his seat, first degree murder and he will possibly face the death penalty. There's nothing ambiguous about this situation.

As far as taking five minutes of talking before tazing him, who are we to pass judgement? We're not cops. As a non-cop, it seemed like they should have concluded that talking was useless the 4th time the suspect repeated himself like a broken record, but maybe, maybe sometimes, a little more talking works. Suppose they tazed him after 30 seconds, the guy shoots the cops, and now I imagine people would be saying the cops didn't talk enough.

People can say "if the suspect was black, bla bla bla", all you will be doing is adding bias upon more bias. A lot of traffic stops with black people almost certainly involve lots of talking like this too, we just don't see it because it's not news worthy.