Michael Rothstein
Michael Rothstein
ESPN Staff WriterMichael Rothstein, based in Atlanta, is a reporter on ESPN’s investigative and enterprise team. You can follow him via Twitter @MikeRothstein.
Shwetha Surendran
Shwetha Surendran
ESPNShwetha Surendran is a reporter in ESPN’s investigative and enterprise unit.Sep 26, 2025, 02:01 PM ET
Shane Tamura, the man who killed four people and then himself in a July shooting at the building that houses the NFL’s headquarters, was posthumously diagnosed with chronic traumatic encephalopathy, according to a statement from the New York City Office of the Chief Medical Examiner.
Tamura, 27, had claimed in a note found in his wallet following the shooting that he believed he had CTE and wanted his brain tested for it after his death. The medical examiner’s office finding determined “unambiguous evidence” of CTE in Tamura’s brain tissue. The testing determined Tamura suffered from “low-stage CTE.” CTE can only officially be diagnosed after death.
“We continue to grieve the senseless loss of lives, and our hearts remain with the victims’ families and our dedicated employees,” the NFL said in a statement. “There is no justification for the horrific acts that took place. As the medical examiner notes, ‘the science around this condition continues to evolve, and the physical and mental