New York City, NY "," A mass shooting at a Midtown Manhattan office building on Monday, July 28, 2025, left four people dead and one injured, with authorities identifying the gunman as 27-year-old Shane Tamura. Tamura, a former high school football player, reportedly left a note claiming he suffered from Chronic Traumatic Encephalopathy (CTE) due to his football career and appeared to blame the National Football League (NFL), whose headquarters are located in the targeted building. After the rampage, Tamura died by suicide.
The incident unfolded at 345 Park Avenue, a 44-story skyscraper housing various businesses, including the NFL. Police stated that Tamura entered the lobby armed with an M4 assault rifle and immediately opened fire, killing an off-duty NYPD officer working security, a building management employee, and a security guard. An NFL employee was also seriously injured.
According to New York City Mayor Eric Adams, Tamura's note indicated his belief that he had CTE and requested that his brain be studied. Multiple law enforcement sources confirmed the note's content, which reportedly expressed grievances with the NFL's handling of the brain disease. While Tamura played high school football in California, authorities emphasized he never played for the NFL.
Investigators believe Tamura intended to target the NFL offices but mistakenly took the wrong elevator, ending up on a different floor before taking his own life. The New York City Office of the Chief Medical Examiner confirmed that Tamura's brain would be examined as part of his autopsy, noting that CTE can only be definitively diagnosed post-mortem.
NFL Commissioner Roger Goodell issued a statement calling the event "an unspeakable act of violence in our building" and expressed gratitude to law enforcement and concern for those affected. Tamura, who drove cross-country from Las Vegas, reportedly had a "documented mental health history" and a concealed-carry license. The motive remains under investigation, but the focus is heavily on the contents of the note found on his person.