George Zimmerman, the man who shot and killed Trayvon Martin, has waived his right to a speedy trial on Tuesday, the [Orlando Sentinel reports.]( Experts believe lawyers are prolonging court proceedings in hopes the controversy fades away from national headlines. Zimmerman, 28, admits he shot Martin, but still claims he did so in self-defense. He pleaded not guilty in court documents, making his appearance unnecessary at Tuesday’s arraignment hearing. In Florida, a defendant is entitled a trial within 175 days of being charged, but Zimmerman’s attorney Mark O’Mara told [ABC News]( he would try to prolong the process to allow racial tensions and the emotion associated with the case to subside.