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SANFORD, FL - JULY 10: Defendant George Zimmerman sits in Semimole circuit court during his murder trial July 10, 2013 in Sanford, Florida. Zimmerman has been charged with second-degree murder for the 2012 shooting death of Trayvon Martin. (Photo by Gary W. Green-Pool/Getty Images)
SANFORD, FL - JULY 10: Defendant George Zimmerman sits in Semimole circuit court during his murder trial July 10, 2013 in Sanford, Florida. Zimmerman has been charged with second-degree murder for the 2012 shooting death of Trayvon Martin. (Photo by Gary W. Green-Pool/Getty Images)

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O'Mara on Zimmerman: 'He's very worried'

George Zimmerman's attorney Mark O'Mara speaks with the media after both the prosecution and defense rested their cases.

O'Mara on Zimmerman: 'He's very worried'

George Zimmerman's attorney Mark O'Mara speaks with the media after both the prosecution and defense rested their cases.