Accompanied by the Rev. Al Sharpton (L), the parents of slain Florida teen Trayvon Martin Sybrina Fulton and Tracy Martin look on as a Miami Police Officer exits the stage at the start of a rally protesting the shooting death of Florida teenager Trayvon Martin in Miami, Florida April 1, 2012. The February 26 killing of Martin by volunteer neighborhood watch captain George Zimmerman has triggered protests around the country and calls for Zimmerman’s arrest. REUTERS/Brian Blanco (UNITED STATES – Tags: CRIME LAW CIVIL UNREST POLITICS)