George Zimmerman, defendant in the killing of Trayvon Martin, arrives with his attorney Mark O'Mara, right, for a pre-trial hearing, Tuesday, April 30, 2013 in Seminole circuit court, in Sanford, Fla. Zimmerman, the former neighborhood watch leader, told Circuit Judge Debra Nelson that he agrees with his defense attorneys' decision not to seek an immunity hearing under the state's "Stand Your Ground" self-defense law. Zimmerman has pleaded not guilty, claiming self-defense. Martin was fatally shot in February 2012 during a fight with Zimmerman in a Sanford gated community. (AP Photo/Orlando Sentinel, Joe Burbank, Pool) Joe Burbank / AP