We have Zimmerman’s sworn statement that he was returning to his car. The prosecution has no evidence to contradict that.
That’s it. That’s all the evidence.
If you want to pretend that in reality he was NOT returning to his car, go ahead. There’s no evidence for that, but go ahead.
If you look at the map and consider the size of the homes that are nearby, this is a small area. Pretending that ten feet in one direction or the other is meaningful when two men are fighting out in an open area “proves” something is idiotic.