Perhaps it happened when he was knocked off his feet from the gun's recoil. Perhaps it was done when he and Trayvon fought. I think that answers to these questions will come out at trial, which is what everyone wanted - an arrest and a trial.
It may not go to trial. They have to get through the preliminaty hearing first and I think that there is mounting evidence that impugns the prosecution's case. I wouldn't be surprised if the case does not suvive the preliminary hearing.
