Part of the gun used by a Las Vegas man to kill four people last night in a Midtown Manhattan office building is under investigation as being provided by an associate. NBC News National Law ...

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

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

Detectives found prescription medication for depression and epilepsy in the Las Vegas home of Midtown mass shooter Shane ...

"It was heartbreaking, shock, still in disbelief," said Walter Roby, the former assistant football coach at Granada Hills ...

This isn’t the first time buildings have re-evaluated their security measures — and it likely won’t be the last.

Investigators believe Shane Tamura, of Las Vegas, was trying to get to the NFL offices after shooting several people Monday ...

Investigators plan to question a man who supplied parts for a gun used in the shooting at a Manhattan office building that houses the National Football League’s headquarters, New York ...

As investigators continue looking into a possible motive for the man who shot and killed four people in New York City, News 3 is looking into the investigative ...