2. But I will expand on this to say that Zimmerman obviously got very worked up about Martin and jumped to some conclusions about him and was following him closely enough to draw Martin's attention. If he had not done this, Martin would probably have just proceeded back to his friend's apartment to mix up his little drug concoction and the whole event would never have happened.
Suppose I go out looking for trouble and I end up having to shoot somebody. Even if the shooting is totally justified, I shouldn't be surprised that I found trouble and ended up having to explain myself in court.