Zimmerman kept following him after being told by the police to leave him alone. Nothing would have happened if Zimmerman wouldn't have been acting like a asshole. Martin was minding his business point blank. So how could Martin have avoided a situation that he never started?
Zimmerman needs to be in prison for the rest of his life.
You don't read well do you?
I clearly said the whole thing was started by Zimmerman. None of this ever would have happened if Zimmerman didn't want play tough guy neighborhood watchman. Conversely, Martin could have chosen to ignore ZImmerman being a douchebag, but he didn't. That was his poor decision. He chose to prove he was a hardass instead of just ignoring Zimmerman and sadly it cost him his life.