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, ...

The gunman who killed four people, including an NYPD officer, inside a Manhattan office building Monday evening left a note ...

The gunman who killed four people in a New York City shooting Monday was the son of a former Los Angeles Police Department ...

The NYPD continues to work with investigators across the country to learn more about the gunman in Monday's deadly Midtown ...

The gunman who killed four people at an office building in New York City on Monday evening left his home in Las Vegas, Nevada ...

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

During evening rush hour in New York City on Monday, a man calmly walked into a Park Avenue office building lobby and killed ...

Follow along for live updates on the New York City shooting, where police investigate motive after five people, including the ...

Officials say a man carrying a rifle killed four people at a New York City office tower. The shooting took place Monday ...

A lone gunman walked into a midtown Manhattan office building Monday and opened fire, killing four people, including an NYPD ...

Live updates and developments about a shooting in New York City's Midtown. Five people, including the gunman and a police ...

Officials said July 29 they believe the suspected gunman in the deadly Manhattan shooting may have been targeting the NFL.