Younger people are different. They are more violent.
My niece, age 14, was beat up by another 16 year old girl in Flagstaff a few days ago.
A boy blocked the bigger, older girl from stomping the other in the head. The girl disappeared for a few days, but was found and arrested along with another girl.
They were released to parents' custody, and will be tried as juveniles, for aggravated assault.
(I was a fighter to the age of 17. Never kicked anybody in the head. No knives or guns. Never arrested, just suspended. And boys fought then, but not the girls.)