Authorities confiscated several items from a Las Vegas apartment tied to a gunman who used an AR-15-style rifle to kill four ...

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

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 ...

Police searched Shane Tamura’s employee locker at a Las Vegas Strip casino in their attempts to piece together why he killed four people and then himself in New York City earlier this week, the 8 ...

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

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

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 ...

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 ...