It won’t be ruled negligent, accidental, or intentional. The final ruling will be that it was “justified” because the officer feared he could suffer death or great bodily injury.
Don't be so sure. The feds just released a scathing report against the Cleveland Police Department. FWIW, the police aren't anywhere near as bad as the report. The problem leadership has neglected community policing, and they have to react forcefully when issues emerge. I'd rather they figure out who gave that child the real-looking gun, and if the mom or the rec center director knew about it. But this one will be political.
The real concern about Cleveland is this is going to empower the thug element to impose their culture on others.