(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.

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

It's a point borne out by recent research from ASIS International, a global organization of security professionals, that showed 14% of companies had no comprehensive plan to address active-assailant ...

BREIT CEO Wesley LePatner was among those killed in the shocking attack, plus more New York City real estate news.

A man stalked through a Manhattan office tower firing a rifle, killing four people, including a New York City police officer, ...

Family and friends gathered at Central Synagogue to mourn Wesley LePatner, one of four victims killed in Manhattan office ...

Wesley LePatner, 43, was among the four people killed by a gunman who stormed the Park Avenue building where she worked on ...

A security expert offers a list of ‘must-haves’ for workplace safety that may save lives in the event of a mass shooting.

Roger Goodell also gave a health update on the league employee who was seriously injured in the gun attack that killed four ...

NEW YORK -- Wesley LePatner, a senior executive at Blackstone, was laid to rest on Thursday. She was one of four killed after ...

The unpredictable factors leading up to a mass shooting in a Manhattan office building highlight the limitations of a ...

New York City Mayor Eric Adams says that a gunman who killed four people at a Manhattan office building was trying to target the headquarters of the National Football League but took the wrong elevato ...