Cowboys player Marshawn Kneeland who died by suicide had early-stage CTE

Marshawn Kneeland, a player for the Dallas Cowboys who died by suicide, has been posthumously diagnosed with early-stage chronic traumatic encephalopathy (CTE). The degenerative brain disease is caused by repeated head impacts and has been found in hundreds of former NFL players. His case reignites debate about player safety and the long-term health consequences of playing American football.