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

Among the dead were a police officer, a security guard and two people who worked at companies in the building. An NFL ...

New York City investigators believe a co-worker of the Las Vegas man who killed four, including a police officer, provided a ...

A gunman who killed four people at a Manhattan office building bought the rifle from his supervisor at a Las Vegas casino, ...

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

New York City detectives investigating this week's mass shooting were interviewing the attacker's associates in his home ...

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

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

The man who stormed a Manhattan office tower with a gun, killing four people before killing himself, worked in the ...

Those words were spoken in a recent CBS This Morning interview by James Dolan, the owner of the New York Rangers and the CEO ...

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

Exclusive video shows SWAT teams executing a search warrant at the Las Vegas apartment of Shane Tamura, the man behind Monday ...