Prosecutor stated Zimmerman "was scared because Mr. Martin started circling his car." That's from Z's statement to police the night of the incident.
Pretty strange a guy would follow someone who he was so scared of, who he didn't know may have been armed, and might, in his opinion, be "on drugs."
GZ may have been (in his mind) trying to do the right thing even if it means putting yourself in danger for the good of the neighborhood.
I dont know and dont care as it doesn't matter. That has nothing to do with what happened.
Again, if Martin would have just called the cops (911) instead of talking to his girl, maybe noone would have died.
I think if someone broke into my house, I will not stay on the phone with my girl while I confronted the thief (assuming i thought there was a threat), i would immediately call the COPS IF THERE WAS TIME (which it seemed there was).