According to the New York Police Department (NYPD) and federal authorities, the suspect has been identified as Shane Tamura, 38. Tamura was reportedly armed with a semi-automatic rifle and drove for several days from the Midwest to New York. Investigators believe that his intended destination from the outset was the building housing the NFL headquarters.
On the day of the incident, Tamura entered the building through the front entrance and immediately opened fire on an NYPD officer. He then fired indiscriminately in the lobby, fatally shooting a woman who was trying to escape. He also shot a building security guard in the elevator hall, leaving multiple bullet holes.
Security footage captured at the scene recorded the suspect’s disturbing behavior. New York City Mayor Eric Adams described the footage as “eerie,” noting a moment when the suspect looked at an unarmed woman but let her pass without firing.

Afterward, Tamura took the elevator up to the 33rd floor, where the office of real estate firm Rudin Management is located. There, he fatally shot another victim before taking his own life. The identity of the victim is still being confirmed, but authorities suspect the individual was connected to the workplace.
In an interview with FOX5, Mayor Adams stated, “He was clearly targeting NFL employees.” Authorities also found a note among Tamura’s belongings, in which he claimed to be suffering from chronic traumatic encephalopathy (CTE)—a degenerative brain condition often observed in American football players, known to cause emotional instability and aggression.

It remains unclear whether Tamura was a former athlete, but in the note, he described himself as a “victim of CTE” and expressed strong resentment toward the NFL. Experts point out that the league's past reluctance to acknowledge the link between CTE and football-related head injuries may have made it a target of Tamura’s anger.
Testimonies from family members and acquaintances suggest that Tamura had exhibited signs of psychological instability for several years. One neighbor reported, “He had been withdrawing from people for months, as if something had taken hold of him.”

Following the incident, the area around Park Avenue was temporarily sealed off, and all building occupants were evacuated. While the lockdown has since been lifted, NYPD and the FBI continue to examine surveillance footage, communication records, and evidence found in Tamura’s vehicle to fully uncover the circumstances behind the attack.
Police said the shooting appeared to be the act of a lone gunman but added that further investigation is needed to determine the motive. Mayor Adams emphasized, “To prevent such heinous acts, we must seriously confront issues surrounding mental illness and gun control.”
In response to the incident, the NFL released a statement: “We express our deepest condolences in light of this tragic event. The safety of our employees and stakeholders is our highest priority, and we are fully cooperating with the authorities in the investigation.”