There was a clear attempt at peaceful arrest and detainment after the initial encounter and sobriety test. That was answered with violent resistance. Goto threat neutralization.
Unarmed suspect: No lethal force, attempt to physically subdue or disengage safely. Possession of Tazer lost. Goto suspect armed.
Non-lethal takedown: partner attempts. Tazer shot fails to connect, other Tazer in possession of suspect. Officer involved in struggle draws firearm. Fires.
I can't fault that. They were out of options.
And even if you accept, for sake of argument, that protocol should be changed. Suppose instead of a Tazer being stolen it was the officer's firearm with rubber bullets, and the officer left with a rifle at hand. The rubber bullets are still "non-lethal" right? Should they just let the suspect run off? God no. Taking the Tazer was what escalated things into deadly force territory, and even then only after the other officer made a best effort attempt at non-lethal takedown.
They did everything we, the Public, have demanded they do, in the order we demand it be done. This is undeniably a case where this officer is being targeted because of the unrest provoked by that cretin in Minneapolis, and Riot police elsewhere. Those are not his actions. He's just a cop, doing his job, in the midst of a stop gone bad. Just as the suspect was a human being who let himself get into a state in which he made some exceedingly poor decisions; one of which escalated things to the point of elevating the threat level of a situation to the point an officer felt lethal force was the last option he had.
I'm not comfortable setting a precedent for all cops, when faced with an armed assailant not to take care of business in such a manner as to bring confrontation to an end as quickly and bloodlessly as possible. Nor am I going to lock up or discipline one that tried to do things right. That we have video evidence of that trying having been done.
I don't like how it ended. If he didn't call in a meat wagon and provide first aid soon enough... Well that I can see being a problem, but that's not a crime. That's a tragedy. If he ended up exclaiming "Got him!", I don't see it as him intending to kill someone that night, I see it asadrenaline come down.
If we expect police to do their jobs, to even work for our protection, and the safety of our communities, we have to extend them the benefit of being able to accept the outcome of their discretion when it falls within the bounds we demand. This one did. It was reasonable. No question. Minneapolis wasn't. Seattle wasn't, the protests in other cities weren't but this one was a clean shoot.