Unclear who instigated the fight - Zimmerman's case was that he had turned around to return to his car when he blundered into Martin, who then assaulted him.
Yeah, and that's what I'd say, too, if there were no other witnesses and the guy I shot was dead.
While we may find that explanation dubious, we can't say that Zimmerman's actions started the fight.
I understand what you mean; only Zimmerman knows how the actual physical fight started. What I meant was Zimmerman's actions - following Martin around - led to the physical fight. I realize those actions aren't provocative enough to find him guilty of anything regarding Martin's death, but it's still true that if Zimmerman had just waited for the police to arrive none of this would've happened.
Zimmerman's case is that he did stop following Martin when told he didn't need to do so (note: the dispatcher is a civilian who doesn't have the authority to tell people what to do - hence the advice of "we don't need you do to that") and was returning to his car when he blundered into Martin, who then assaulted him.
The dispatcher is a civilian, and so is Zimmerman. Had Zimmerman caught up with Martin and asked him who he was and what he was doing, Martin would've been well within his rights to tell Zimmerman to fcuk off.
The problem for the prosecution was that there wasn't any reliable evidence to contradict this - the best they could manage was some very unimpressive evidence that a recorded scream was Martin rather than Zimmerman (their witnesses for this fell apart under cross-examination). The correct course for this would have been to refer it to the US equivalent of a Magistrates court (Grand Jury?), at which point I suspect that it would have emerged there was insufficient evidence and the case would have been dropped.
I agree, and I think they went ahead and went to trial because going to trial and losing was a better option than not going at all, politically-speaking.
The law is clear that if you believe your life is in danger it is legal to use lethal force to defend yourself. That is as true in the UK as it is in the US. This means the prosecution have to prove beyond reasonable doubt that you DID NOT believe your life to be in danger at the time you killed the other person, which is a very difficult task, or that you were the one to start the fight - similarly difficult where the accused is the only living witness!
But the wider point stands - to get a conviction with the available evidence, you either need to introduce a presumption of guilt or remove any legal right to use force in self-defence.
I don't think those are the only choices.
As I understand UK law, I think the defendant has to prove they were acting reasonably as opposed to the prosecution having to prove the defendant's state of mind. (I'm not a lawyer, though, so I may be missing some important element of it.)
In some US jurisdictions a person must attempt to avoid the fight before killing the other person, but Florida isn't one of them.
In either case, while I don't want too much judging after the fact, I'm ok with a standard other than "I felt like I was going to be killed so I killed the other guy first."