WASHINGTON, DC – MARCH 27: (L-R) National Bar Association President Daryl Parks, attorney Benjamin Crump and Sybrina Fulton and Tracy Martin, the parents of Trayvon Martin, bow their heads for a moment of silence during a House Judiciary Committee briefing in the Rayburn House Office Building on Capitol Hill March 27, 2012 in Washington, DC. On Feb. 26, 2012, 17-year-old Trayvon Martin was shot and killed by George Zimmerman, a neighborhood watch captain, as Martin was walking unarmed in a gated community where his father’s girlfriend lives. (Photo by Chip Somodevilla/Getty Images)