Todd Ewen, a former professional hockey player, took his own life in September 2015 in the basement of his St. Louis home. Ewen had been suffering from depression and memory loss since his retirement from the NHL, in 1998. Before his death, he confided in his wife, Kelli, that he feared he may have chronic traumatic encephalopathy, or CTE—a neurodegenerative disease that most experts agree is linked to repetitive head trauma. After a grueling decade-plus career in the NHL, Ewen exhibited all the tell-tale symptoms. Kelli sent his brain to the neuropathologist Lili-Naz Hazrati to be analyzed for signs of CTE. (Source: The Atlantic)
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