Dossier
Concussion & CTE Foundation
Coverage of Concussion & CTE Foundation in the Nexus archive.
- Former Dallas Cowboys defensive end Marshawn Kneeland had early stage CTE at time of death
Marshawn Kneeland, a Dallas Cowboys defensive end, had early stage CTE linked to repeated head trauma at the time of his death by suicide in November 2025 after a high-speed chase with police. His family released postmortem analysis findings through the Concussion & CTE Foundation.