Apparently there have been conflicting reports of what Zimmerman's account is. I'm not sure if this is because Zimmerman himself was inconsistent or if the facts that were leaked to the media simply have been misleading. But the latest I have read is not that Zimmermain claims he was jumped from behind... he claims that Martin walked up to him from behind and asked him if he had a problem with him, or something to that effect. Martin's girlfriend's story would fit into this more latter account. If they exchanged words, then no one was jumped from behind.
Jumped was my characterization, but an attack that Zimmerman would be expecting, from behind, could be the case as well. I am somewhat troubled by the wound on the back of Zimmerman's head.
Wouldn't it fit with the broken nose if Martin punched him in the face, knocking him over so his head hit the pavement? Followed by Zimmerman firing? Which would still be voluntary manslaughter because he's using lethal force in "self-defense" in a situation where his life isn't actually in danger.
EDIT: especially because Zimmerman was previously following Martin around, as both the 911 call and the story Martin's girlfriend says show. Zimmerman's actions provoked a confrontation that led to Zimmerman getting knocked over and shooting Martin, is my current impression.
