Dallas Cowboys' Marshawn Kneeland diagnosed with CTE after death by suicide, researchers say

A local football player's brain was analyzed after his death. The examination revealed a degenerative brain disease. This condition is often linked to head injuries.

The player, a defensive end for the Dallas Cowboys, was 24 years old. His body was found by police in the early morning. Further details about the diagnosis and the player's death are available from the Concussion & CTE Foundation and other sources.