Dave Duerson's family sues NFL over his suicide CHICAGO - The family of former Chicago Bears player Dave Duerson filed a wrongful death suit against the NFL on Thursday, claiming the league didn't do enough to prevent or treat the concussions that severely damaged his brain before he killed himself last year. The suit was filed in Chicago on behalf of Duerson's son, Tregg, and three other children. Duerson died on Feb. 17, 2011, of a self-inflicted gunshot wound to the chest at his home in Sunny Isles Beach, Fla. The lawsuit accuses the NFL of negligently causing the brain damage that led Duerson to take his own life at the age of 50 by not warning him of the negative effects of concussions. Attorney Thomas Demetrio, who is representing Duerson's family, said the NFL should have been a leader in educating current and former players about head injuries. Dave Duerson suicide: Was brain disease to blame? Dave Duerson, ex-Bear, dead at 50 "They not only dropped the ball, they maintained until current times that there was no connection between playing football, receiving concussions and brain damage," Demetrio said. The NFL said in a statement that it had not yet seen the lawsuit. "Dave Duerson was an outstanding football player and citizen who made so many positive contributions but unfortunately encountered serious personal challenges later in his life," the NFL said. We sympathize with the Duerson family and continue to be saddened by this tragedy. A native of Muncie, Ind., Duerson was a third-round draft pick by the Bears in 1983 out of Notre Dame and played 11 seasons in the NFL before retiring in 1993. He won Super Bowls with the 1985 Bears and 1990 Giants, and played in four Pro Bowls. The lawsuit was filed less than a week after nearly a dozen former NFL players living in Louisiana sued the NFL over their own concussions. Several former New Orleans Saints players are among the 11 ex-players named as plaintiffs in the class-action lawsuit filed Friday in federal court in New Orleans. The lawsuit says each of them has developed mental or physical problems from concussions or concussion-like symptoms. Several suits blaming the NFL for concussion-related dementia and brain disease already have been consolidated in Philadelphia. Duerson had at least 10 concussions in his NFL career, according to his family, and lost consciousness during some. He left notes for his family asking that his brain be donated to science, and researchers at the Center for the Study of Traumatic Encephalopathy at Boston University's School of Medicine concluded he had "moderately advanced" brain damage and CTE related to blows to the head. The lawsuit says the damage affected his judgment, inhibition and impulse control. The suit also names helmet maker Riddell Inc., alleging that the helmets didn't adequately protect players from concussions. Messages left for a Riddell spokeswoman weren't immediately returned Thursday. CTE, previously known as "punch-drunk syndrome," is a degenerative brain disease linked to memory loss, depression and Alzheimer's-like symptoms. The CSTE and other organizations like the Brain Injury Research Institute have posthumously identified the disease in dozens of athletes since they began research almost a decade ago. Earlier this month, Hall of Famer Tony Dorsett joined more than 300 former players -- including three other members of the Pro Football Hall of Fame, and at least 32 first- or second-team All-Pro selections -- in suing the NFL, its teams and, in some cases, helmet maker Riddell. Their lawyers argue that more should have been done in the past to warn about the dangers of concussions, and more can be done now and in the future to help retired players deal with mental and physical problems they attribute to their days in the NFL.