Over 40 seconds passed from the beginning of the call til the shot was fired. If George Zimmerman was looking to hunt down and shoot Trayvon Martin he could have shot him on sight and the fighting and screaming heard in the background of this 911 call would never have happened. Zimmerman would have recieved no injuries at all. This proves Zimmerman fought with Martin for over 40 seconds before he felt he had to fire his weapon.

In 50% of shootings the victim is shot with their own weapon. Once an attacker is in reach of a armed victim at that poinit there is a 50/50 chance the victim will be shot with thier own weapon. When you listen to the screams in the background of this call I think that is what we are hearing.