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Skip to main content September 27, 2025 Police officers respond to a shooting incident in Midtown Manhattan on July 28. JOHN LAMPARSKI/AFP/Getty Images The gunman who killed four people in an NYC office building in July had chronic traumatic encephalopathy (CTE), according to the New York City medical examiner’s office. The degenerative brain disease linked to repeated head injuries sustained in football and other contact sports can only be diagnosed posthumously. The gunman, identified as Shane Tamura, died by suicide following the shooting, which took place in the building that houses the headquarters of the National Football League. The suspect had no known connection to the NFL. The medical examiner “found unambiguous diagnostic evidence of Chronic Traumatic Encephalopathy, also known as C.T.E., in the brain tissue of the decedent. The findings correspond with the classification of low-stage C.T.E., according to current consensus criteria,” according to a statement. A multi-page note was found in Tamura’s pocket, claiming he was suffering from CTE related to his time playing high school football, a law enforcement source previously told Rolling Stone. “Study my brain please. I’m sorry,” Tamura wrote, according to the source. The note also mentioned a 2013 Frontline documentary on the topic of CTE and referenced former NFL players who suffered from the disease. The note also accused the NFL of hiding football’s potential risk to players’ brains. “He blamed the NFL,” the law enforcement source said. Trending Stories Nate Bargatze Says He Didn’t Plan on Donating His Own Money for Failed Emmys Bit Trump’s U.N. Escalator Meltdown and the Politics of Embarrassment Priscilla Presley Calls Michael Jackson ‘Manipulative’: 7 Things We Learned From New Memoir Gunman Who Killed 4 in Shooting at NFL Headquarters Had CTE CTE, a neurodegenerative brain disease that has been connected to repeated blows to the head, has been seen in athletes, including hockey players and boxers, as well as military veterans. The disease, which was found in a study of donated brains of NFL players, has been associated with “impulsivity, depressive symptoms, anxiety, and explosivity,” according to one study. Symptoms can include loss of memory, changes in mood, confusion, and difficulty thinking clearly. The four victims killed in the rampage were off-duty NYPD officer Didarul Islam; Wesley LePatner, an executive at Blackstone; security officer Aland Etienne; and Julia Hyman, an employee at Rudin Management. A fifth victim was wounded and taken to the hospital in critical condition, ABC News reported. NFL Commissioner Roger Goodell said the “seriously injured” victim was an NFL employee. Assata Shakur, Convicted Black Liberationist and Tupac’s Godmother, Dead at 78 Jon Blistein ‘It’s Always Somehow Our Fault’: Moms of Autistic Kids Push Back on Trump’s Tylenol Claims Fortesa Latifi ‘Ghost of Yōtei’ Is an Emotionally Gripping and Meditative Samurai Revenge Saga Alyssa Mercante Theo Von Demands DHS Remove His Video From ‘Banger’ Deportation Promo: ‘I Didn’t Approve’ Take It Down Larisha Paul 'Pokémon Legends: Z-A' Shows a More Modern Way to Catch 'Em All Christopher Cruz Go to PMC.com Most Popular Liev Schreiber, Mayim Bialik, Debra Messing Among 1,200 Industry Names Rejecting Israeli Film Boycott in New Open Letter: It 'Advocates' for the 'Erasure of Art' Jimmy Kimmel to Return to ABC on Tuesday After Show's Controversial Suspension Jamie Lee Curtis’ Post About Jimmy Kimmel’s Suspension Is as Subtle as It Is Chilling Statue of Donald Trump and Jeffrey Epstein Holding Hands Mysteriously Appears in D.C. You might also like Jimmy Kimmel Fully Back on the Air: Nexstar Joins Sinclair in Returning Late-Night Show to ABC Stations After Temporary Blackout 11 hours ago Everything You Need to Know About the New iPhone 17, Plus How to Score One for Free 10 hours ago EXCLUSIVE: Hue Reintroduces Itself to a New Generation of Consumers Looking for Colorful Legwear 16 hours ago Nexstar and Sinclair Will Now Air ‘Jimmy Kimmel Live!,’ Ending Its Preemption in Multiple Major Cities 13 hours ago Invest in Sports: Join Sportico in NYC on Nov. 4! 2 weeks ago Rolling Stone is a part of Penske Media Corporation. © 2025 Rolling Stone, LLC. All rights reserved. Powered by WordPress.com VIP
