A tragic mass shooting unfolded in a Manhattan skyscraper when Shane Tamura, 27, entered the building housing the NFL headquarters and killed four people before taking his own life. Tamura, a former high school football star and casino security guard, left a note blaming the NFL for concealing the risks of chronic traumatic encephalopathy (CTE), a brain disease linked to repeated head trauma. Believing he suffered from CTE, he intended to confront the NFL but mistakenly took the wrong elevator. Among those killed were NYPD officer Didarul Islam, Blackstone executive Wesley LePatner, Rudin Management staffer Julia Hyman, and security guard Aland Etienne. An NFL employee was also injured but survived and managed to warn colleagues. The rifle used was self-assembled and the revolver legally purchased. President Trump, local officials, and researchers have commented on the tragedy. The case has renewed concerns over gun violence, mental health, and the long-term impacts of contact sports. Investigations continue in Nevada and New York as families and communities grieve the senseless loss.