Excerpts from the article:"With a single punch, Trayvon Martin decked the Neighborhood Watch volunteer who eventually shot and killed the unarmed 17-year-old, then Trayvon climbed on top of George Zimmerman and slammed his head into the sidewalk several times, leaving him bloody and battered, authorities have revealed to the Orlando Sentinel.
That is the account Zimmerman gave police, and much of it has been corroborated by witnesses, authorities say."
"In his version of events, he had turned around and was walking back to his SUV when Trayvon approached him from behind, the two exchanged words then Trayvon punched him in the nose, sending him to the ground, and began beating him."
"Trayvon was visiting his father's fiancée, who lived there.
He had been suspended from school in Miami after being found with an empty marijuana baggie. Miami schools have a zero-tolerance policy for drug possession."
http://articles.orlandosentinel.com/2012-03-26/news/os-trayvon-martin-zimmerman-account-20120326_1_arizona-iced-tea-suv-unarmed-black-teenager