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

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

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

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

Police executed a search warrant at the Las Vegas apartment of Shane Tamura, where the items obtained included a goodbye note ...

The NYPD sent detectives to Las Vegas to work with federal law enforcement in the investigation into Monday's deadly shooting ...

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

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