George Zimmerman loses attempt to end GPS monitoring before Trayvon Martin trial Updated at 10:58 a.m. A judge rejected a request from George Zimmerman's defense attorneys Tuesday to end his 24-hour GPS monitoring while he is out on bond in the fatal shooting of Florida teenager Trayvon Martin. Judge Debra Nelson also denied a request for the former neighborhood watch volunteer to be able to live outside Seminole County. Zimmerman is charged with second-degree murder in the shooting of Martin, 17, following an altercation in Sanford in February. He has pleaded not guilty, claiming self-defense under Florida's "stand your ground" law. Zimmerman attorney Mark O'Mara argued in court that his client should be allowed to travel freely throughout Florida. O'Mara said the bond restrictions made it "very difficult" for Zimmerman to meet with the defense team's expert witnesses and investigators and also posed a safety risk to Zimmerman. Assistant state attorney Bernie de la Rionda strongly opposed O'Mara's motion, questioning how ending the GPS monitoring would make Zimmerman safer. "Isn't the defendant safer if law enforcement knows exactly where he is?" de la Rionda asked. The prosecutor suggested that Zimmerman wanted to be freed of the restrictions to benefit from his celebrity in the high-profile case and that he wasn't taking the precautions of someone who had been threatened. "Why is he walking in through the front door, with the media following him?" de la Rionda asked. Why is he appearing on national TV? O'Mara denied that Zimmerman sought to make any gains from his status. "The idea that he wants to live a life of publicity, you know, I wish he could, but, you know, he'd be wearing a bulletproof vest," O'Mara said. Nelson had set a trial date for June 10 and a "stand your ground" hearing for 45 days before trial.