Of course Caden's parents are going to try to support him in any way possible. That's what parents do. Let's hope they also ensure he is held accountable, whatever that means with regard to the matters of the situation.
We don't know. He could be a seriously troubled teen, or a spoiled brat. (We do know he's not terribly bright considering he was at Walmart immediately before the "incident" and witnesses reported seeing a boy on a bicycle in the area at the time of the shooting.) I believe LE will respond to this in a way that best serves the community they protect. Assuming they do so with transparency regarding the details when they are known. It doesn't always go that way, but I hope LE are fair in their charges, assuming there are charges of some kind. (They immediately came out with the video from Walmart and retracted the abduction theory they'd been fed by Caden (indirectly).)