Read the report, it's mostly and conveniently using the word 'child' to describe 15-19 year olds. It should read 'juvenile'.
Coincidentally, it's also the age of the
40%-60% (depending on urban/suburban split) of gang bangers.
So before you go to sleep at night having nightmares about 2 year old's toting Magnum .45's try adding a little rational thought to your deliberately misleading post.