George Zimmerman, a 28-year-old neighbourhood watch volunteer in Florida, has admitted to shooting and killing 17-year-old Trayvon Martin, who was unarmed and walking home from a store. But police never arrested Zimmerman, saying there was no way to prove he hadn't acted in self defence, as he claimed.<br /><br />But Martin's family says Zimmerman's claim is nonsense. Martin was carrying nothing but a bag of candy, they said, and a friend who was on the phone with Martin at the time said he was frightened by Zimmerman, who was following him.<br /><br />The case has led to accusations of racial profiling against Zimmerman and now involves federal prosecutors and civil rights groups from across the nation.<br /><br />Al Jazeera's Andy Gallagher reports from Miami.
