I'm sorry, but you're an idiot.
I am 6 feet tall and my 13 year old cousin is just as tall as I am. Don't give me that bullshit about him being a kid, a 14 year old can hold a gun or knife or other deadly object just like anyone else.
My question is why he felt the need to use deadly force, which the story doesn't say.
There was an episode of malcom in the middle about this. His dad punches this big fat guy who looks like the bully's dad. It was actually some 16 year old kid 😀