Don’t bring a taser to a gunfight. I’d also direct your attention to the 911 call at the bottom, as a good example of reacting well under stress. In a 911 call, you should tell them you need a police officer and ambulance, because someone has been shot. They will ask you if you’re the shooter. Just tell them to get help on the scene quickly. This guy did that. Your next call needs to be to your attorney.
Looks like the kid is going to be OK. Hopefully this turns into a valuable lesson for him.