Actually they instructed him to stop following, but when Trayvonn began running, he ran after him. A witness also said she heard the boy screaming for help, and the policeman (who wasn't there) corrected her and told her she'd heard Zimmerman screaming.
Also, if the law states that I can defend myself with deadly force (Stand Your Ground), and someone approaches and attacks me, and I legally begin to defend myself...does it then become legal for them to shoot me dead because I was defending myself? I don't think so.
Like I said, I don't know what really happened. I wouldn't be surprised by either scenario.
I would say that if someone approaches and attacks
you and you defend yourself I wouldn't think they could legitimately claim self defense.
If someone approaches you and says they don't recognize you and asks what are you doing here and you proceed to beat the chit out of them and they shoot you dead, I would say that despite the fact they approached you and initiated the contact it is self defense.
Its not always black and white, in my opinion, the one that escalates the violence beyond what is reasonable loses the right to claim self defense.