The Prosecution brought on a law professor to try to prove that
Zimmerman had prior knowledge of the "stand your ground".. it backfired
when that states witness made it clear that:

Even if you start the "encounter", if you are met with what you consider
overwhelming and deadly force, you may pull your pistol and shoot the
guy beating on you... Period... so it's irrelevant who started the
encounter, or who followed who. Specifically, it's irrelevant even, who
started the fight in the first place...