“..when he (Zimmerman) was attacked by the kid. Kid was on top of him beating the sh** out of him, Zimmerman was yelling for help(can be heard on the 9/11 tapes. When he shot him and police arrived on the scene Zimmerman was bleeding and had grass stains on his back.”
We don’t know that the kid attacked Zimmerman and we don’t know that Zimmerman did not try to detain Martin. For all we know Zimmerman was following him with his gun drawn. The fact that he ended up bloody and with grass stains does not show us how it happened. Martin ended up bloody also. He probably had grass stains as well. All we can assume is that Zimmerman was apparently losing the physical conflict when he fired his weapon. Even if Zimmerman was calling for help it does not mean he did not start the altercation. It means he was losing the fight he started or he was trying to set himself up as the victim before he fired.
You have no idea who started the fight and unless an eyewitness comes forward willing to testify that Zimmerman physically attacked Martin first there have been no laws broken if one witness has stated that Zimmerman was on his back on the ground getting beat up . If it was his voice screaming for help that corroborates the witness’ statement.