by: Alex Byington 55 minutes ago _AlexByington
Nov 14, 2016; New York, NY, USA; General overall view of the entrance to the NFL Headquarters at 345 Park Avenue. Mandatory Credit: Kirby Lee-USA TODAY Sports
The gunman who entered the Midtown Manhattan building that houses the NFL’s headquarters in late July, killing four people, has been diagnosed with “low-stage CTE,” according to the New York City chief medical examiner. The NYC OCME revealed the diagnosis following a posthumous neuropathological examination of the brain of the late shooter, 27-year-old Shane Tamura , who committed suicide at the scene.
Tamura entered the Manhattan building at 345 Park Avenue — home of the NFL’s headquarters — on July 28 wearing body armor and carrying an AR-15-style rifle. Once inside, Tamura killed four, including an off-duty New York City police officer working as building security, then barricaded himself inside an office on the 33rd floor before turning the weapon on himself and committing suicide. It was the deadliest mass shooting in New York City since 2000.
Breaking: The NYC Office of the Chief Medical Examiner found that the brain of Shane Tamura, the shooter at NFL HQ this summer, had evidence of “low-stage CTE.” pic.twitter.com/GJmhP0mRgc
— Amanda Christovich (@achristovichh) September 26, 2025
“Following a thorough assessment and extensive analysis by our neuropathology experts, OCME has found unambiguous diagnostic evidence of Chronic Traumatic Encephalopathy, also known as CTE, in the brain tissue of the decedent (Tamura),” the OCME statement read Friday afternoon. “The findings correspond with the classification of low-stage CTE, according to current consensus criteria. CTE may be found in the brains of decedents with a history of repeated exposure to head trauma. The science around this condition continues to evolve, and the physical and mental manifestations of CTE remain under study.”