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 ...

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 ...

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

Authorities confiscated items including gun paraphernalia and pill bottles from a Las Vegas apartment tied to a gunman who used an AR-15-style rifle to kill four people in Manhattan, according to ...

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 ...

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 ...

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, ...