Uh, no. It's been documented that Apperson claimed Zimmerman previously waved a gun and threatened to kill him. It has not been documented that he actually did so.
And you either misunderstand or misrepresent self defense law. It doesn't matter if an attack is anticipated, it must be imminent. If I said, "I will kill you next week", you do not have the legal right to use deadly force against me right now.
And conversely, threatening someone with a gun and then rolling up your window does not eliminate the threat of deadly force.
A lot of hay has been made about the implausibility of someone rolling up their window after making a threat with a gun, but the person in question here is George Zimmerman whose erratic behavior has been a hot topic in the media since his acquittal.
Why would someone barricade himself inside his girlfriend's home against the police after a domestic dispute?
Why would someone "volunteer" to guard a store without knowledge or consent of the owner?
Why would someone try to set up a boxing match in which he challenges all comers after so recently being a acquitted of murder with a defense that determined he has very little capacity to fight or defend himself?
Not a whole lot of what Zimmerman has done post-acquittal comports with logic or common sense. And that behavior is public knowledge, and most likely known by Apperson.
Coupled with the fact that Apperson and Zimmerman have a history of previous confrontations, if we assume what Apperson claims is true and look at it from his perspective, I don't blame him for being in fear for his life.
But again, we don't know if what Apperson claims
is true, so we will have to wait for an investigation to sort things out.