Ann Flowers holds her grandson, Devon Mitchell, on her shoulders as they take part in an NAACP march and rally in front of the Sanford Police Department for Trayvon Martin in Sanford, Florida, March 31, 2012. Sanford is the town where Martin, 17, was shot dead on February 26 after George Zimmerman, 28, a Hispanic neighborhood watch captain, believed the young man walking through the gated community in a hooded sweatshirt looked suspicious. REUTERS/Lucas Jackson (UNITED STATES – Tags: CRIME LAW CIVIL UNREST)