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

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

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

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

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

Five people—including the suspected perpetrator Devon Tamura and NYPD officer Didarul Islam—were left dead at an office ...

The man who stormed a Midtown Manhattan skyscraper paid his boss $1,400 (£1,100) for the semi-automatic rifle, police say.

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

The man who stormed a Manhattan office tower with a gun, killing four people before killing himself, worked in the ...

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