The gunman who killed four people at an office building in New York City on Monday evening left his home in Las Vegas, Nevada late last week, traveling across the country to execute a mass shooting ...

The gunman in the deadly shooting at a New York City office tower had a background in casino surveillance and once held a ...

Ivy League graduate Julia Hyman, 27, was killed in New York Monday after a tragic mix-up by the shooter led him to the wrong ...

Police have identified the man who entered a Midtown Manhattan office building wearing body armor and opened fire killing ...

Jon Ferrer was working late Monday evening, reviewing tax returns and trying to get a head start on the week. The KPMG senior ...

The man who killed four people in the New York City skyscraper that is home to NFL headquarters carried a note blaming the ...

The shooting at a Midtown Manhattan tower exposes how eliminating threats can be nearly impossible, even in fortified ...

Barriers were erected in front of the ritzy Midtown Manhattan office building where a crazed gunman killed four people Monday ...

Four people were killed, including a police officer, and one other person was was in critcal condition in a shooting in ...

NYPD officer Didarul Islam and Blackstone executive Wesley LePatner are among those dead in the NYC skyscraper shooting.

The 27-year-old Nevada man left a note at the scene voicing anger that his mental illness may be linked to his having played football, officials familiar with the investigation told NBC News.

Officials said July 29 they believe the suspected gunman in the deadly Manhattan shooting may have been targeting the NFL.