Demonstrator Margarette Gabriel shouts while holding a sign during a rally to protest the reaction to Trayvon Martin’s death in Miami, Florida April 1, 2012. Attorneys for the family of slain black teenager Trayvon Martin are asking the U.S. Justice Department to review reports that prosecutors undermined a police investigation of shooter George Zimmerman by overruling a detective who wanted to charge him. REUTERS/Lucas Jackson (UNITED STATES – Tags: CRIME LAW CIVIL UNREST)