They're children. Not juveniles.

https://fair.org/home/copspeak-when-black-children-suddenly-become-juveniles/

Reporters likely believe they’re being Official and Serious when adopting Copspeak, but they ought to consider why these terms are used. Police, like the military, use language deliberately designed to dehumanize those with whom they interact, in order to obfuscate their guilt when they kill or injure. It’s an institutional lexicon developed over decades of public relations fine-tuning. There’s no objective reason why reporters ought to follow suit, unless they view themselves as extensions of the police.