You don't yell for help then state the perceived criminal act. It's usually after the act has been committed that you yell "help, I've been shot."
Since Martin was found dead on the scene with a gunshot wound to his chest, I'd say it's safe to assume that he was unable to yell "help, I've been shot." He might have whispered it in the final seconds that he bled out.
If is possible that when he say this ass hole had a gun and begin fight and screaming for help because immediate after the gun shot the screaming stopped. I doubt that if Zimmerman had the gun in his hand ready to fire he was screaming for help
![doubt :doubt: :doubt:](/styles/smilies/doubt.gif)
Another thing is Zimmerman was back at his car, how could he have shot trayvon yards form his home INSIDE the complex.
That he was looking for a house number is pig shit on a stick. all he had to do was give the name of the complex which 9-1 was familiar with. Zimmerman is digging his own shit hole.