Attorney General Eric Holder speaks at the annual convention of the NAACP in Orlando, Fla., on Tuesday. Holder told the convention that "Stand Your Ground" laws that have been adopted in 30 states should be reconsidered. David Manning/Reuters /Landov hide caption

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George Zimmerman leaves court with his family after Zimmerman's not guilty verdict was read in Seminole Circuit Court in Sanford, Fla. on Saturday. Joe Burbank/AP hide caption

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George Zimmerman, who is charged with second-degree murder in the death of Trayvon Martin, at a court hearing last June in Seminole County, Fla. Joe Burbank/Orlando Sentinel/pool/Getty Images hide caption

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