these things happen, if the white kids started it then i suppose he did deserve a beating. If you do something that provokes someone, then..you're gonna get your ass beat.
And since he didn't even need medical attention..the black kids should just be charged for assault, and the white kid for public mischief.
These are just kids. And i'm not sure how things are in the usa, but in Canada, i've never heard of an under 17 kid charged with anything serious.
(i'm not saying that it hasn't happened, but nothing that really stands out)
"Omae wa mou shindeiru"
-You're already dead