Former Cowboys DE Kneeland Had Early Stage CTE at Death

Former Dallas Cowboys defensive end Marshawn Kneeland, who died by suicide in November 2025 after a high-speed chase with police, had early stage chronic traumatic encephalopathy, a brain abnormality linked to repeated concussions, his family announced Tuesday. albergomalica.it

The Boston University CTE Center, which investigates the long-term consequences of repetitive brain trauma in athletes, determined Kneeland was in stage one of four of CTE after analyzing his brain tissue. The brain disease can only be diagnosed after death.