Large amount of evidence released in Trayvon Martin case

George Zimmerman is shown with lacerations to his face and the back of his head on Feb 27, 2012. (Florida State District Attorney's Office)

May 17, 2012 8:41:08 PM PDT
Medical examiners found evidence of marijuana in Trayvon Martin's system after he was fatally shot by a neighborhood watch volunteer, according to an autopsy released Thursday in a massive package of evidence.