File photo of Tracy Martin and Sybrina Fulton, parents of Florida shooting victim Trayvon Martin, are comforted by U.S. Representative Sheila Jackson Lee at a public forum on their son's case in

 
File photo of Tracy Martin and Sybrina Fulton, parents of Florida shooting victim Trayvon Martin, are comforted by U.S. Representative Sheila Jackson Lee at a public forum on their son
Tracy Martin (L) and Sybrina Fulton (R), parents of Florida shooting victim Trayvon Martin, are comforted by U.S. Representative Sheila Jackson Lee (D-TX) as they speak at a public forum on their son's case, on Capitol Hill in Washington, in this March 27, 2012, file photo. The Martin family has been telling their story as part of a campaign to have George Zimmerman arrested. REUTERS/Jonathan Ernst/Files (UNITED STATES - Tags: POLITICS CRIME LAW)