Autopsy Reveals That Former NHL Player Todd Ewen Did Not Have CTE

The results raise even more questions about why certain athletes get the brain disease and others do not.
Al Bello via Getty Images

When the former N.H.L. enforcer Todd Ewen died in September, reportedly of a self-inflicted gunshot, his brain was sent to researchers. Years of memory loss and undiagnosed depression led to speculation that Ewen, 49, had chronic traumatic encephalopathy, a degenerative brain disease caused by repeated blows to the head.

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