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July 5, 2013 4:44 PM
The prosecution in the murder trial of George Zimmerman wrapped up its case after a dramatic day of testimony Friday, with Travyon Martin's mother and brother saying the screams for help that can be heard in the background on a 911 call came from the 17-year-old. Lawyers for George Zimmerman asked a judge on Friday to consider acquitting the former neighborhood watch volunteer of second-degree murder charges in the killing of unarmed black teenager Trayvon Martin, arguing the state failed to meet its burden of proof. Prosecutors say they are resting their case in the murder trial of George Zimmerman, the neighborhood watch volunteer charged with fatally shooting Trayvon Martin.