George Zimmerman, defendant in the killing of Trayvon Martin, arrives in Seminole circuit court, in Sanford, Fla., with his attorney Mark O'Mara, left, for a pre-trial hearing, Tuesday, April 30, 2013. (AP Photo/Orlando Sentinel, Joe Burbank, Pool)

Photo by: Joe Burbank

George Zimmerman, defendant in the killing of Trayvon Martin, arrives in Seminole circuit court, in Sanford, Fla., with his attorney Mark O'Mara, left, for a pre-trial hearing, Tuesday, April 30, 2013. (AP Photo/Orlando Sentinel, Joe Burbank, Pool)