Trayvon “punched him in the nose, his nose was broken, and he was knocked to the concrete.” Robert Zimmerman said. “It’s my understanding Trayvon Martin got on top of him and just started beating him in the face, in his nose, hitting his head on the concrete .”
Read more here:
http://www.miamiherald.com/...
They found Martin "laying face down in the grass," according to a police report.
http://www.cnn.com/...
Last time I checked grass didn't grow on concrete