One story I read said that a witness told the police they heard Martin crying/yelling for help. The witness said the police corrected them and told them they had heard Zimmerman calling for help. I saw in one story where it was reported that Zimmerman was bleeding from his nose and the back of his head. Would the police have taken pictures of this?
I don't understand the intent in this case of the stand your ground law. So if someone goes after another person for whatever reason, confronts them/possibly provoking them and then kills them, it could be qualified as self defense? Serious question.
Regarding your first points, you are correct. There will be documentation of the injuries to Zimmerman. Also, the interview with the witness who has arguably changed her story, will have been taped, and so that will all be turned over to the prosecutors.
The reason it has not been made public is that the investigation is ongoing.
The reason that the 911 calls were released is because the attorney for the family went on tv and claimed that people within the Sanford police department were calling her and secretly telling her that they supported charges against Zimmerman.
The reality is that the audiotapes are chilling, but they aren't going to be the key since no one else saw it. The key will be the physical evidence at the scene, plus what people ORIGINALLY said -- not after they had a chance at minor celebrity status if they claim it happened differently, now, after the controversy erupts.
The prosecutor will charge him only if they think he is guilty and they think they can convict. Based on what has come out so far, the people now claiming to be able to support charges reportedly gave significantly different statements during the investigation.
That makes you wonder....
(PS, its clear Zimmerman is a vigilante type. Very dangerous. Will be sued and will probably lose. But that is not the same thing as contemplating some kind of criminal charge, which is very different.)