Here's the autopsy info....
Trayvon Martin Autopsy Report: Killed By Bullet Fired At Intermediate Range
One scratch? Sounds like a one way fight that he clearly dominated until shot.
That scratch was on Trayvons knuckle from beating Zimmerman. The prosecution can't prove Zimmerman ever laid a hand on Martin.
According to GZ on the hannity tape, he was punched a dozen times by Martin after hitting the ground. He also stated that Tray covered his mouth and face trying to get GZ to shut up (why because he was yelling for help?)...GZ said this was excruciating having trays weight on his nose after just having it punched and fractured. I agree that wouldnt be too comfortable.