And in particular, the conviction here was delinquency of a minor. That's usually used to convict parents of teenagers whose kids do serious crimes.
I caveat to say, we don't know the full details. But it all seems pretty weak sauce.
It's far from improbable that a family court judge would have a bone to pick. Law enforcement gets a weird lens about public safety because of selection bias.
The boy could have been spotted walking along a highway median, or similar detail that would kind of spoil the outrage effect. Lord knows the pedestrian hostile nature of modern infrastructure.
Though in this case the kid was walking all in a gated community.