Mark O'Mara, attorney for George Zimmerman, addresses reporters outside his offices in Orlando, Fla., Wednesday, April 11, 2012. Zimmerman, 28, the neighborhood watch volunteer who shot 17-year-old Trayvon Martin, was arrested and charged with second-degree murder Wednesday after weeks of mounting tensions and protests across the country. O'Mara said Zimmerman would plead not guilty. (AP Photo/Phelan M. Ebenhack)
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