Shane Tamura, who fatally shot four people at the NFL's New York headquarters, was diagnosed with Chronic Traumatic Encephalopathy (CTE). This diagnosis, confirmed by the NYC Medical Examiner, aligns with Tamura's own writings where he claimed a traumatic brain injury and accused the NFL of concealing player brain dangers for profit. Tamura died by suicide. The medical examiner's office stated CTE may result from repeated head trauma but did not confirm if it played a role in the shooting.

Prepared by Emily Rhodes and reviewed by editorial team.