Key witness in Trayvon Martin shooting changed story

A key witness to the Trayvon Martin shooting changed the story he had given Sanford, Fla., police, telling state authorities he was not sure who was screaming during the altercation with George Zimmerman, NBC Dateline confirmed Friday.

Source: http://pheedo.msnbc.msn.com/click.phdo?i=924076746ffa8735579875021697450c

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