His AR-15 assault rifle, which he bought from a co-worker for $1,400, had a full clip of 15 bullets, police said.

The gunman who killed four people, including a New York City police officer, during a shooting Monday inside a Manhattan ...

The man who killed four people at a Manhattan office building bought his AR-15-style rifle and getaway car from his Las Vegas ...

On Monday night, police said he entered the skyscraper at 345 Park Avenue in Midtown Manhattan and immediately opened fire in ...

Exclusive video shows SWAT teams executing a search warrant at the Las Vegas apartment of Shane Tamura, the man behind Monday ...

There were 23 shell casings and 13 bullet fragments recovered from the lobby of 345 Park Avenue and 24 spent shell casings on ...

Investigators found also found 800 rounds and a 357-caliber handgun in a BMW the shooter drove to the scene, the NYPD said.

Former NYPD Sergeant Felipe Rodriguez weighs in on the gunman's actions and what we know about his background.

Authorities say the man who killed four people at a Manhattan office building bought the rifle he used in the attack and the ...

The alleged gunman at a shooting rampage in a midtown Manhattan office building was identified as 27-year-old Shane Tamura, of Nevada.

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

A Las Vegas man, Shane Tamura, opened fire in a Midtown Manhattan office tower, killing four people before ending his own ...