To me that says, they have looked at all evidence in the case as provided by law enforcement, statements from witnesses, the person they represent, and video evidence, and they understand that their client has done nothing worthy of having charges filed at this time.
Unless something comes to light or more evidence from another eye witness comes up, I would say he is looking pretty good for being in the clear on this. Just an opinion, but then I am basing this on all the evidence to support this as I have read it so far.