The physical evidence is all that we have along with the 911 tapes. The physical evidence would include not only the injuries suffered by Zimmerman, but also, other evidence gleaned from Martin, e.g., blood, skin, condition of clothing, position on the ground, angle of entry/exit wound, forensics, etc. Those are all part of the physical evidence, which you and I don't have, but the police do. It was on this basis that they did not arrest Zimmerman.
It amazes me that the FACT the 17 year old was not doing anything wrong; had NOT been involved in the burglaries; that Zimmerman had been essentially stalking the 17 year old due to an unfounded suspicion isn’t being taken into consideration. Why is it not appropriate to even consider that Zimmerman used poor judgement? Are you suggesting that you would not, if being followed by someone, take steps to get that person to end their actions against you? Sorry, but I’m not willing to take Zimmerman’s word simply because the person he shot is unable to tell his side of the story. And, neither should anyone else.
You are making a lot of assumptions, e.g., Martin was not doing anything wrong. If you believe the contemperaneous description from Zimmerman on the 911 tape, Martin was acting suspiciously in a gated community that had suffered a recent rash of crime. Why was Martin there? Why did he run away and then. according to Zimmerman, attack him? Any investigation would determine the chronology, the physical circumstances, geography, etc. In the final analysis, you can only rely on facts not conjecture.
I sat on a jury that convicted someone of murder and we recommended a 30 year, no parole sentence. It certainly opened my eyes to how murder investigations are conducted and the proof that is needed. You can't convict someone just because you don't accept their word. Our system protects the individual placing the burden on the state to prove that someone is guilty beyond a reasonable doubt.
You seem to be caught up in this manufactured hysteria and rush to judgment. Sharpton, Martin's parents, and some in the MSM are calling for Zimmerman's arrest and conviction. Our system of justice does not work that way nor should it. What do you want to happen beyond the investigation, much of it already completed? Under FL law, Zimmerman had a concealed weapons permit and he was acting in self-defense. So far, there have been no facts to say that he is guilty of a crime. Will you accept that verdict or do you want him to pay some sort of price beyond that which he is already suffering along with his family.
I view this as a tragedy, but I am not calling for Zimmerman's arrest and conviction. Given your comments, it is painfully obvious that you have already made up your mind as to Zimmermman's guilt. Fortunately, our justice system doesn't work that way. I will accept Zimmerman's guilt or innocence based on the facts and evidence, nothing else.