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

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

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

The gunman traveled to NYC from Las Vegas over the weekend, and appeared to know which floor of the office building he wanted ...

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 ...

Authorities say the man who killed four people at a Manhattan office building bought the rifle he used in the attack and the ...

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

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

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

Detectives searched the studio apartment of 27-year-old Shane Tamura, who shot five people on Monday before killing himself, ...

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 ...