I'll withhold my judgement for now pending release of more information.
Specifically, Airsoft (and other replica) guns are normally sold with an orange tip to prevent just this sort of incident. Of course, a lot of parents hailing from the land of utter stupidity buy the things for their kids and the allow the kids to remove the tips or paint them over (or even do it for them for reasons only God knows).
I haven't seen anywhere in the coverage thus far whether the gun the kid was pointing had that orange tip.
If it didn't have one, the shooting was legal and the parents are going to have to live with this. OTOH, if it did have the orange tip, I'd say things are going to probably get pretty bad for the officer who shot the kid.