Shane Tamura, 27, who fatally shot four people in the building that houses the National Football League's headquarters Monday ...

Officer Didarul Islam, 36, who was guarding the building on a paid security job when he was killed, had served as a police ...

The $1,400 M4 assault rifle New York City mass shooter Shane Tamura used to kill four people inside a Midtown Manhattan ...

Four people were killed on Monday when a man, identified by police as Shane Tamura, walked into the lobby of 345 Park Avenue ...

As law enforcement continues its investigation across the country into the motives behind the horrific shooting that shook ...

Law enforcement sources say Shane Tamura bought the AR-15 style rifle he used to open fire at a Manhattan skyscraper from a former co-worker for $1400. The sources say that former co-worker also sold ...

The gunman accused of killing four people in a Midtown Manhattan office tower bought the AR-15-style rifle used in the attack ...

A supervisor at the Las Vegas casino where Shane Devon Tamura worked legally purchased the gun used in the Midtown Manhattan shooting and sold it to him for $1,400, a law enforcement official told CNN ...

The gunman who opened fire in a New York City skyscraper, killing four people, including an off-duty cop, bought his $1,400 ...

The attack on a seemingly secure building has rattled workers and prompted managers to examine whether they are adequately ...

Late July is usually a time of great optimism and excitement for the NFL. Training camps are underway, preseason games are ...