If they didn't have anything to charge him with (ie: assault on a LEO), then the LEO had ZERO reason to spray him. I agree that we cannot see the very first part of the confrontation, but what we do see is the kid with his arms and hands DOWN at his sides and showing zero aggression. The LEO was WAY out of line and they know it - that's why they didn't charge the kid with anything and just let him go.