the cop put himself into a bad situation.
if he brings his training officer along, as per requirements, they easily take down the kid with no bullets. In fact, the other officer arrived and deployed taser THEN THE SHOOTER FIRED TWO MORE TIMES.
I think those last 2 shots were the ones that cost him his job and possibly freedom. Once cooler heads arrive and tase his ass, you have numbers against a tased unarmed man. Shooting him two more times at close range to 'finish him'?
Dude was a hairdresser who got out of the police academy in March, age 49. Ran in first to be a hero then capped a man being tased. What a mess.