This particular incident does seem to have been inappropriately handled, but to all those saying lower the age for treating criminals as adults is the right answer, I say ...
Be careful what you wish for.
I have read many cases where someone is punished too harshly, because of the ways the laws are written. It simply is impossible to get at the heart of all the different reasons bad things can happen in laws that must be written in black and white.
Would you prefer those making innocent and relatively harmless mistakes in jail, when they shouldn't be, or criminals free when they shouldn't be? It's going to be one or the other, because no laws can be written to be absolutely perfect for every situation. I tend to figure it is easy to fall into the former group, and so prefer a little leniency in the laws, least an unfair imprisonment happen to me or a loved one.
In this one case, the boys should be in a juvenile center, and not just "supervised."
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Mom to an amazing young adult AS son, plus an also amazing non-AS daughter. Most likely part of the "Broader Autism Phenotype" (some traits).