Yeah, it`s that whole dead body problem, again, Heywood. And logic.
Logic tells me that Zimmerman was a neighborhood watchman.
He followed Trayvon till the cops could arrive. No running.
Trayvon turned around, had words with Zimmerman. At that point, it could have ended there.
But instead, Trayvon threw a punch and broke Zimmerman's nose, and a fight ensured.
Please don't tell me that Trayvon threw a punch while Zimmerman held a gun on him.