It doesn't take much to be charged with that. If the officer was reaching towards him and gz pushed his hand away, that is enough for an arrest on both the charges.
Exactly. Not something you can make stick in court.
I wonder what the actual arrest was for? There's no indication of what the crime was he was being arrested for - apparently that wasn't prosecuted either. Although there's a resisting arrest charge, where's the charge for the crime he was initially being arrested for?
I have a picture in my head of George Z's behavior, and it seems like he's a mouthy hot head. And cops can be hot heads too, as can 17 year old boys, and they seem to have a way of finding each other.