If some of these accounts are correct, it looks like there is fault on BOTH parties. Zimmerman may have started it by following Martin, and he shouldnt have. But that is not reason for a physical altercation. Martin should not have escalated it, if he did, to a physical altercation. There is no clear account of the incident, so it is speculation, but....
If Martin felt threatened, he had the opportunity to flee, or threaten to call the police, or yell for help. Escalating the incident to a physical one is an act of aggression. If the above dialogue is correct, he has no claim of self defense. Zimmerman put himself in the situation, but if someone physically attacks you, then self defense is justified. The above dialogue, again IF true, makes me think there is fault on both parties, but shows Martin as an aggressor that doesnt appear very threatened.
JMO
EDIT...but seriosly, just think about this for one moment.
-If you are walking home, and someone is following you, what do you do? First, I keep on walking until I am somewhere public, or at my home where I can find shelter and protection.
-Run. Seriously....RUN.
-Yell loudly for help.
-Use the cell phone in your fucking pocket and call the police. And yell loudly that you are calling the police.
If YOU are feeling threatened by someone that may be following you, do YOU turn around and ask them if, "they have a problem"?....and when they answer no, you respond, "well now you do"
? Then get in a physical altercation?
I sure as fuck dont respond that way. To me that is a reaction of bravado, and for sure someone that is NOT threatened. IF that dialogue is true, the kid sure as shit at a minimum shares blame for his own death.