Police say the gunman in the Manhattan office building shooting tried to target NFL offices. In a note found in the gunman's pocket and obtained by CBS News, he alluded to having CTE. A former high school football player,

An NFL employee was seriously injured in a shooting at a   Midtown Manhattan office tower Monday where a gunman killed at least four people before turning his weapon on himself.

A married father of two with a third child on the way, the 36-year-old was working a New York Police Department-approved private security detail, in uniform, when he and three other people were killed Monday at the Manhattan skyscraper that houses the NFL's headquarters and other corporate offices.

A New York City police officer who was among the four people shot and killed by a gunman during a rampage at a Manhattan office tower will be laid to rest Thursday. Officer Didarul Islam, 36, was fatally shot Monday in a midtown building housing the National Football League’s headquarters.

NYPD Chief John Chell describes Midtown Manhattan office shooting as mayhem after gunman Shane Tamura killed four people, including Officer Didarul Islam.