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

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

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, ...

Shane Tamura killed four people at a Manhattan office building Monday, including Blackstone executive Wesley Lepatner and New ...

The funeral will be held Thursday for the police officer who was one of four people killed in Monday's mass shooting at a ...

Officials said the gunman fatally shot himself after his attack, which set off a chaotic scene that rippled out into the ...

Four people were killed and a fifth was injured in a mass shooting at a Midtown Manhattan office building on Monday.

NYC mayoral candidates Zohran Mamdani and Andrew Cuomo clash over law enforcement support after a Manhattan office building ...

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

New York City is mourning NYPD Officer Didarul Islam and three other people killed in Monday's shooting inside an office ...

Investigators are examining why the gunman who killed four people before taking his own life at a New York City office tower ...

Everytown for Gun Safety’s Nick Suplina joins ABC News’ Linsey Davis to unpack what the Manhattan shooting tells us about the ...