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

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

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

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

A gunman from Las Vegas shot five people, killing four, including an off-duty New York City police officer, inside a Manhattan skyscraper, before fatally shooting himself, officials confirmed ...

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

The man who killed four people at a Manhattan office building bought his AR-15-style rifle and getaway car from his Las Vegas ...

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

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

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

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