Gunman kills 4, including police officer, in shooting at New York City office tower CTV NewsManhattan gunman who killed four was targeting NFL headquarters, says New York City Mayor The Globe and MailExclusive | NYC mass shooter Shane Tamura found with note blaming NFL for giving him CTE — even though he never played pro football New York PostManhattan shooting suspect claimed to have CTE, mentioned NFL in note, sources say ABC NewsWhat is CTE? NYC gunman might have been targeting NFL over its handling of brain trauma USA Today
