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

There were 23 shell casings and 13 bullet fragments recovered from the lobby of 345 Park Avenue and 24 spent shell casings on ...

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

Didarul Islam, 36, was fatally shot during Monday’s Midtown Manhattan shooting. Sources say the off-duty NYPD officer was ...

A vigil for NYPD Det. Didarul Islam, one of the four victims​ killed in the Midtown Manhattan office building shooting, is ...

A shooting Monday at an office building in New York City that is home to the Blackstone investment firm and the NFL left four ...

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

The owner of a private security business on Park Avenue said he questions how a shooter got so far into a Midtown office ...

This is a breaking news story. For latest updates, please go to our live blog. An NYPD officer and at least four other ...

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

Bryan Kohberger will spend the rest of his life in prison for the grisly murders of four young University of Idaho students.

Fox News contributor Paul Mauro and former NYPD detective Pat Brosnan discuss the death of NYPD officer Didarul Islam on 'Fox ...