New York City mayor Eric Adams said Tuesday that the 27-year-old gunman who killed four people and injured another in a shooting at 345 Park Avenue on Monday was trying to target the NFL's headquarters,

The NFL held a moment of silence Thursday to commemorate the four people killed by a shooter who was targeting league headquarters in New York.

Despite updated rules and safer equipment, football players continue to suffer from concussions. Experts warn that long-term risks remain, especially for those exposed to the sport at a young age. A recent shooting at NFL offices in New York City have sounded alarms again.

The 27-year-old man who shot and killed four people at a Midtown office building on Monday carried a note in his pocket, police sources told ABC News.

Shane Tamura speculated in a suicide note that he was suffering from CTE, a degenerative brain disease associated with sports-related head injuries

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