Linebacker Ray Lewis announced Wednesday that he will retire after the Baltimore Ravens' season ends. Most media coverage of Lewis' legacy has omitted his part in a 2000 double-homicide case. Harry How/Getty Images hide caption

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Dr. Ann McKee, professor of neurology and pathology of Boston University School of Medicine and co-director of the Veterans Affairs Center for the Study of Traumatic Encephalopathy, inspects a brain in the Bedford Veteran Medical Center last year. Stan Grossfeld/Boston Globe via Getty Images hide caption

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Senior guard Darius Miller of Kentucky shoots during the Wildcats' win over Baylor in the South Regional final. Kentucky, the NCAA Tournament's No. 1 seed, faces rival Louisville in the Final Four Saturday. Kevin C. Cox/Getty Images hide caption

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In Saturday's Final Four, Expect A Kentucky Showdown And Lots Of Emotion

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