This is appalling, esp. given the age of those involved. But it could happen ANYWHERE. With the taunts and the rhetoric that the youths were using, I say, "THANK YOU SO MUCH, PRESIDENT TRUMP!"
that 13 yr old is definitely a sociopath. although it sounds draconian, i believe that these little monsters can be discovered at an even earlier age. their brains develop differently. they should just be somehow neurologically neutralized.
His outlook and attitude is responsible for a lot of nasty behavior!