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Family photos of former Minnesota Vikings football player Fred McNeill.
Family photos of former Minnesota Vikings football player Fred McNeill.

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    Possible first case of CTE diagnosed in the living

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Possible first case of CTE diagnosed in the living

An autopsy has confirmed experimental tests that detected CTE in former linebacker Fred McNeill. CNN's Dr. Sanjay Gupta reports.

Possible first case of CTE diagnosed in the living

An autopsy has confirmed experimental tests that detected CTE in former linebacker Fred McNeill. CNN's Dr. Sanjay Gupta reports.