During evening rush hour in New York City on Monday, a man calmly walked into a Park Avenue office building lobby and killed ...

LAS VEGAS -- The gunman who killed four people before taking his own life in a midtown Manhattan office building that houses the NFL's headquarters had for years sought medical help for frequent, ...

An NFL employee was seriously injured during the mass shooting at the Manhattan office tower that houses the league’s ...

Two teams NYPD detectives headed to Las Vegas Tuesday, to execute search warrants at Shane Tamura's home and at a gun store ...

Shane Devon Tamura, 27, identified by the NYPD as the Midtown Manhattan office building shooter/Obtained by ABC News(NEW YORK ...

The deadly shooting at a New York City high-rise office building Monday night raises new questions for CEOs and businesses as ...

The gunman who killed four people in a Midtown Manhattan office building Monday was targeting the NFL offices but took the ...

A shooter wearing a bulletproof vest opened fire inside a Midtown skyscraper that houses Blackstone and NFL headquarters, ...