Residents hold up images of teenager Trayvon Martin during a rally to protest his death in Miami, Florida April 1, 2012. Thousands of protesters gathered in a downtown bayfront park on Sunday demanding the arrest of George Zimmerman, a neighborhood watch volunteer who shot and killed an unarmed black teenager, Trayvon Martin, in central Florida a month ago. REUTERS/Lucas Jackson (UNITED STATES – Tags: CRIME LAW CIVIL UNREST)