Interesting distinction. It also further reinforces the point I tried to make about negligence or manslaughter. Zimmerman was following this kid around with a gun was his action and we must ask why? I'm not sure who laid hands on who is the important distinction here, rather we should ask why was Zimmerman following this kid around with a gun in the middle of the night? and was it concealed or not? I believe their are laws against concealed weaponry?
Also I feel I must point out. Zimmerman is the adult in this scenario. Alot of this will depend on what Martin gets tried as.