NYC Gunman Brings Issue of C.T.E. to NFL's DoorShane Tamura never played in the league, but the police believe he was seeking vengeance over the handling of head injuries in football.
Source: NYC Gunman Brings Issue of C.T.E. to NFL's Door (https://www.nytimes.com/2025/07/29/us/nyc-shooting-gunman-nfl-cte.html)