Tests reveal former NFL player suffered from brain disease
Haunted by husband's death, widow takes CTE fight to Super Bowl
Did head injuries lead to Dave Duerson's suicide?
Duerson Act would ban pre-teen tackle football in Illinois
Duerson brain tissue analyzed: Suicide linked to brain disease
Duerson case has some unusual complications - NBC Sports
Dave Duerson death: Family of football star who killed himself
Former NFL Player Commits Suicide, Donates Brain to Science
A Suicide, a Last Request, a Family's Questions - The New York Times