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

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

The NYPD sent detectives to Las Vegas to work with federal law enforcement in the investigation into Monday's deadly shooting ...

The gunman in the deadly shooting at a New York City office tower had a background in casino surveillance and once held a ...

The alleged gunman at a shooting rampage in a midtown Manhattan office building was identified as 27-year-old Shane Tamura, ...

New York City police detectives searched a studio apartment in Las Vegas that belonged to the suspected gunman in Monday's ...

New York City police detectives searched the Las Vegas studio apartment of the suspected gunman in Monday's mass shooting at ...

The first funeral was held Wednesday for one of the four people killed in the Midtown office shooting as police in Las Vegas ...

A man carrying a rifle killed four people at a New York City office tower Monday, including an off-duty New York City police ...

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