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At Trial, Witness Says Zimmerman Acted In Self-Defense

A key witness for the prosecution in the George Zimmerman trial took the stand on Friday. Neighbor John Good is the only person to have seen the fight between Zimmerman and 17-year-old Trayvon Martin. Zimmerman shot and killed Martin. Good testified it appeared Martin was on top of Zimmerman, straddling him and that Zimmerman was the person calling for help.