NYPD said the gunman purchased the fully-assembled AR 15-style rifle used in the shooting from his supervisor.

Police are retracing Tamura's movements from Nevada to New York after a Midtown Manhattan shooting that left four people dead ...

Shane Tamura, a 27-year-old former high school football player from Las Vegas with a documented mental health history, was ...

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

Tamura was involuntarily held after being considered a danger to himself or others, according to a law-enforcement official.

The Palmetto State Armory M4 assault rifle used in the shooting that killed an NYPD cop and three civilians is .223-caliber ...

The New York City Medical Examiner determined a cause and manner of death for the gunman who killed four people inside a midtown Manhattan office tower before turning the gun on himself. Shane Tamura ...

Tisch said Tamura had a Nevada gun license and used an AR-15 style assault rifle. Tamura legally purchased a revolver in June using his concealed carry permit, Tisch said. CBS and CNN published a ...

Investigators found a note left by Midtown mass shooter Shane Tamura at his Nevada apartment saying he felt like a ...

The 27-year-old Nevada man opened fire at a New York City office building, killing at least four people and then himself.