What would I have done? I'd have talked to the boy, it's not difficult. Screaming PUT THE HAMMER DOWN!  Is escalating, calmly talking de-escalates, violence must only be used when necessary. The lawsuit has precedent. 
Read the story again, he shot 5 times about a second after the taser. In court, this is where the hair splits. The taser didn't work because he didn't wait to see, he shot way too soon. 

Are the cops now encouraged to just brutalize the public however they see fit? 911 ruined the America I loved, when white hats didn't torture, Andy Griffith was the police ideal, and freedom didn't mean submission to authority for the sake of safety.

Now alleged patriots defend this while despising the very government the cops represent.