Gospel singer Tina Campbell of the group Mary Mary sings to the family of slain teenager Trayvon Martin at a rally in Los Angeles

 
Gospel singer Tina Campbell of the group Mary Mary sings to the family of slain teenager Trayvon Martin at a rally in Los Angeles
Gospel singer Tina Campbell of the group Mary Mary (R) sings to the family of slain teenager Trayvon Martin, (L-R) Sybrina Fulton, Tracy Martin, and their son Jahvaris Fulton, 21, at a rally in Los Angeles, California, April 26, 2012. Martin, an unarmed black 17-year-old, was killed in Florida in February by a neighborhood watch volunteer who is white and Hispanic. Police initially declined to arrest the volunteer, George Zimmerman, citing Florida's "Stand Your Ground" law, which allows people to use deadly force when they believe they are in danger. REUTERS/Lucy Nicholson (UNITED STATES - Tags: CIVIL UNREST CRIME LAW ENTERTAINMENT)