I added what you may have missed. Let's put it this way we both are giving opinions. But the difference between you and me I do have some experience with collection of evidence from crime seine areas. Take for instance the 911 call since that one video that I have posted I can tell when he starting running after Martin and when Zimmerman stop running after martin. You could too all you have to do is sit and listen the the sounds.
The ding ding ding of keys in an ignition when the door opens the shutting of the door. The huffing and puffing of Zimmerman running and then you can hear foot steps on concert. Shortly after he acknowledges that he should not follow Trayvon the huffing and puffing stops that's also around the time you can hear feet on concert sound.
Then we take into account Zimmerman knew the police were in route it makes no sense for him to shoot anyone unless he was jumped and Trayvon went for Zimmerman's gun.
I have mentioned this once before. If someone had come forward and said they saw Zimmerman running with his gun drawn, that would show cause in favor for Trayvon that he was standing his ground. That would be the only angle the DA would have to get a conviction.
The fact you omit is he was told by police stay by the mail boxes, and instead got out of his SUV, and by his breathing indicates that he was running. He had to get on a sidewalk path, make two turns to get to where the killing took place. Those two turns by Martin were on the direct route back to where he was staying with his father. The 911 call made by Zimmerman, clearly indicates that he had already decided that Martin was up to no good. Terms like "these assholes always get away" demonstrate Zimmmerman's prejudice, even if you discount "******* coons," which the experts will testify about.
Then we have his girlfriend's testimony, and it's been reported that the phone records support her. That Martin was scared, because some big guy was following him. She claims she told him to run, which he must have, else why would Zimmerman run?
If anyone had "stand your grounds" rights it was Treyvor. And Zimmerman gave him reasonable cause to feel himself in danger. The best outcome I can see for Zimmerman is negligent homicide.