LAS VEGAS -- The gunman who killed four people before taking his own life in a midtown Manhattan office building that houses the NFL's headquarters had for years sought medical help for frequent, ...

What we know about Tamura’s life, how he got the assault rifle that he used to kill an NYPD officer and three others, and the ...

Officer Didarul Islam, 36, who was guarding the building on a paid security job when he was killed, had served as a police ...

(CNN) — During evening rush hour in New York City on Monday, a man calmly walked into a Park Avenue office building lobby and killed a police officer, then opened fire on other innocent strangers.

The man who shot four people dead with an assault-style rifle inside a Midtown Manhattan skyscraper was carrying a "suicide ...