Probably nailed the kid in the heart ~ but we don't know what the autopsy was. No doubt we will find out when Court TV covers this one.
Seriously. I'm really surprised that the police didn't take the guy to the local station and had a little Q&A. Just to cover their ass. Not only would it have justified their cool CSI equipment, it would justify purchasing new stuff if they didn't have any. But more so, look boys we have some extra overtime!
Here is a link to a story a week ago where the police say that Zimmerman was bleeding from his nose and head.
It also says that police took Zimmerman into investigative detention and took his gun, which was being tested.
All of the claims that Zimmerman initiated the physical altercation are just that: claims without any witnesses.
Could it have happened that way? Perhaps. I just do not see any evidence for it.