The mother of the man who killed four people at a Manhattan office tower home to the NFL told 911 dispatchers during a 2022 incident when he threatened to kill himself that he suffered from a sports-related concussion and other issues.

The NFL season kicked off at the annual Hall of Fame game with a moment of silence for the four people killed earlier this week by a shooter who was targeting league headquarters in New York.

Mourners packed a Bronx mosque to pay respects to a New York City police officer who was among the four people killed when a gunman opened fire this week at the Manhattan skyscraper that houses the NFL's offices.

The NFL vowed to be resilient, two days after league headquarters was targeted by a gunman who killed four people on Monday.

Authorities say the man who killed four people at a Manhattan office building bought the rifle he used in the attack and the car he drove across country from his supervisor at a Las Vegas casino.

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

The man who killed four people in the New York City skyscraper that is home to NFL headquarters carried a note blaming the league for his mental health problems.

A New York City police officer and an executive at an investment firm are among the four people killed by a gunman at a Manhattan office tower.

Players and coaches around the NFL reacted with shock and sadness Tuesday after a gunman killed four people at the New York office building housing the league's headquarters.

Investigators plan to question a man who supplied parts for a gun used in the shooting at a Manhattan office building that houses the National Football League’s headquarters.

Police say a gunman who killed four people in a Manhattan skyscraper before taking his own life claimed to have a brain disease linked to contact sports and was trying to target the National Football League’s headquarters in the building.

Investigators are examining why the gunman who killed four people before taking his own life at a New York City office tower targeted the National Football League and whether he suffered from a brain disease.