Eyewitness testimony often lies

Demonstrators wait as they call for Georgia state officials to halt the scheduled execution of convicted cop killer Troy Davis at the Georgia Diagnostic and Classification Prison in Jackson, Ga., on Wednesday, Sept. 21, 2011. The execution of Davis was delayed while the U.S. Supreme Court considered a last-minute appeal from the convicted murderer's lawyers, US media reported.
ERIK S. LESSER/AFP/Getty Images
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