You apparently do not live an area where there is a neighborhood watch ( or a need for one). Zimmerman did EXACTLY the right thing. You no doubt live somewhere that the crime level is close to zero. Neighborhood watches have been set up precisely to have people in the area paying attention to those in the neighborhood. Calls to the police for this purpose are not unusual.
Zimmerman has the right of self defense. I wonder if your nose had been broken and a young male was on top of you pounding your head into the cement multiple times....would you shot the attacker? or would you wait to see if you would die from your head wounds?
Oh I see so in your book if someone reports somebody is acting strange that is proof of criminal behavior? I never wrote that Zimmerman had no reason to call the police just that there was no evidence a crime was being or had been committed.
I do not dispute a fight occurred I dispute relying on Zimmerman and conflicting eye witness accounts to arrive at the facts which lead to that fight.