http://www.nytimes.com/2012/03/19/us/911-tapes-released-in-killing-of-florida-teenager.html?_r=1
There are several recordings of the several 911 calls made that night by residents. Bottom left of the page at link.
The third recording has the title “There’s just someone screaming outside.”
In this recording you hear screaming and then a gunshot.
Bearing in mind that there are two people in an altercation; one has a gun and the other has a can of iced tea and a bag of Skittles...
Listen to that recording and ask yourself which one is screaming like that.
The question to be asked is...Who was the aggressor...the kid who was walking 'home' from buying candy and who ran away from the guy who was following him...or the adult with the gun who stalked the kid in his car then got out to look for him when the kid ran away?
I've seen plenty of fights where the instigator bit off more than he could chew and got whupped...happens all the time.
The next question is...where was the gun?
Did Zimmerman have it out already?
If, as people here avow, Zimmerman was flat on his back being pummeled by Martin who was on top of him, how did he pull the weapon?
Another question...how far was Martin from Zimmerman when Zimmerman shot him? Close enough for GSR on his clothes?
Too many people here willfully ignore the known facts that Zimmerman was the aggressor for the period that was recorded and that Martin ran. They want us to believe without any substantiation that the roles reversed and Martin became the aggressor and Zimmerman the helpless target.