The shooter behind a deadly rampage inside an office building in Midtown Manhattan on Monday evening was apparently targeting NFL offices there, New York City Mayor Eric Adams said Tuesday morning.Law enforcement sources say investigators recovered a three-page rambling note from gunman Shane Tamura's wallet in which he referenced the brain disease CTE.

Police said Shane Tamura, a 27-year-old former high school football player, had a “documented mental health history” and appeared to be targeting the NFL when he opened fire, killing four people and injuring a fifth before turning the gun on himself.