NEW YORK (AP) — A gunman who killed four people at a Manhattan office building before killing himself claimed in a note to have a brain disease linked to contact sports and was trying to target the ºÃÉ«tv Football League's headquarters but took the wrong elevator, officials said Tuesday.

Investigators believe Shane Tamura, of Las Vegas, was trying to get up to the NFL offices in the lobby on Monday, but that he entered the wrong elevator banks, Mayor Eric Adams said in interviews.

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