If the kid had actually killed somebody, the same media and Karens would be saying: “the cops knew, why didn’t they do something??!!”
Only in Florida do they do something.
I was always told the age of reason was 8 years old, and from that age forward you should be aware of the consequences of your actions, but this is apparently not true since in their wisdom the legislative bodies of a number of jurisdictions (DC comes to mind) it doesn't matter what you do or how many time you do it as long as you're under the magic age limit the most you'll get is a severe talking to and "probation" where you're turned loose on the community to show how reformed you are.