George Zimmerman sits at the defense table during his trial in Seminole Circuit Court in Sanford, Fla., on Monday, July 8, 2013. Mr. Zimmerman is charged with second-degree murder in the fatal shooting of Trayvon Martin, an unarmed teen, in 2012. (AP Photo/Orlando Sentinel, Joe Burbank, Pool)

Photo by: Joe Burbank

George Zimmerman sits at the defense table during his trial in Seminole Circuit Court in Sanford, Fla., on Monday, July 8, 2013. Mr. Zimmerman is charged with second-degree murder in the fatal shooting of Trayvon Martin, an unarmed teen, in 2012. (AP Photo/Orlando Sentinel, Joe Burbank, Pool)