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 ...

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 ...

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

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

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

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

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

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

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, ...