Very sad. In the case of a 10-year-old, I'd argue for indicting the parent(s) or guardian(s) for custodial negligence resulting in the death of another (if such a charge were possible).
I dealt with an 8 year old whose mother told him to carry one of her steak knifes to school in case anybody "messed" with him. She didn't bother to explain what "messed" with was or meant. I took his knife away.