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Zimmerman knew "Stand Your Ground" law, professor testifies

Last year, George Zimmerman, the man who fatally shot Trayvon Martin, said he didn't know about Florida's "Stand Your Ground" law. But Zimmerman's former community college professor testified that the defendant received an "A" in his criminal justice class, which included discussions about self-defense and that particular law. CBS News legal analyst Jack Ford explains what the testimony could mean in the case.
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