The gunman who opened fire at a Manhattan office building Monday, killing four people before taking his own life, legally ...

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

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

Police searched Shane Tamura’s employee locker at a Las Vegas Strip casino in their attempts to piece together why he killed ...

Four people, including an off-duty New York City police officer, were killed Monday when a gunman carrying a rifle opened ...

The attorney for the man who sold what would become the deadly weapon in a mass shooting in New York City earlier this week ...

Within minutes, Tamura had killed four people, injured another, and eventually turned the weapon on himself on the building’s ...

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

The suspect in the shooting that took place in New York City today had driven from Las Vegas to New York and was known to ...

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

The New York City Police Department sent detectives to Las Vegas to work with the Bureau of Alcohol, Tobacco and Firearms to ...