I wouldn’t convict that cop of anything. It was a good shooting. Does anyone think he grabbed the taser and not the cops gun on purpose? Hell no, he just happened to grab the wrong one. And then he used it. Would he have fired the gun if he’d grabbed that? Yes.
So person like that would be capable of what? Running and car jacking someone? Yes. High speed chase killing others? Yes.
The best place to put him down was right there in the parking lot before it got even worse.
Prove your conjecture is true. I will wait.
There’s already a long list of actions that point to the strong possibility of him escalating further. He never fails to do so during the encounter.
He went from driving drunk to passing out to resisting arrest to punching cops to taking their weapons to pointing the weapon at them to firing the weapon.
So you tell me WTF makes you think he wouldn’t have made things worse from there?