https://apnews.com/article/manhattan-office-shooting-nfl-nyc-d32bec88dfe208af1a413cec02034a14

Shane Tamura, a Las Vegas casino security worker, was carrying a handwritten note in his wallet that claimed he had chronic traumatic encephalopathy, known at CTE, investigators said. He accused the league [NFL] of hiding the dangers of brain injuries linked to contact sports.