There are some things that cannot be true. Zimmerman did not turn around when he says he did and head straight back to his truck. Had he done so, he would still have been on the phone with the police when he claims he was jumped. If Zimmerman was knocked to the ground by a single blow to then and then straddled until wriggling his head off the sidewalk, unholstering his gun and shooting, then Trayvon's body would not have been found forty feet away. If Zimmerman held Trayvon spread-eagled while continuing to call for help, his hands would not have been found under him. If Zimmerman was calling for help, and continued to do so, the screams would not stop with the shot.<quoted text>
Reasonable people can have different opinions on that. I for one, know that memory is hardly EVER perfect, and that it is even less so as time goes by. Where I'm confused is your willingness to accept this fact in witnesses who changed what they originally said when it changed from being pro-Zimmerman, yet not in Zimmerman's case when he said different things different times. This seems to belie any claim of neutrality on your part.
Now that is not comparing witness stories. That is comparing Zimmerman's story to physical evidence.