The brain scan came as a surprise even to researchers who for years have been studying the relationship between brain disease and deaths of professional football players.
Aaron Hernandez, the former New England Patriots tight end and a convicted murderer, was 27 when he committed suicide in April. Yet a posthumous examination of his brain showed he had such a severe form of the degenerative brain disease C.T.E. that the damage was akin to that of players well into their 60s.
It was, a lawyer for his family said, in announcing the findings on Thursday, “the most severe case they had ever seen in someone of Aaron’s age.”
C.T.E., or chronic traumatic encephalopathy, has been found in more than 100 former N.F.L. players, some of whom committed suicide, according to researchers at Boston University.
Yet the results of the study of Mr. Hernandez’s brain are adding another dimension to his meteoric rise and fall that could raise questions about the root of his erratic, violent behavior and lead to a potentially tangled legal fight with the N.F.L., the most powerful sports league in the United States.
The league had already faced public relations problems after other high-profile players were found to have C.T.E., including Junior Seau, Ken Stabler and Frank Gifford. Mr. Seau — along with Dave Duerson, Andre Waters and Ray Easterling, among others — killed himself.
For years, Mr. Hernandez was held up as a particularly egregious example of N.F.L. players running amok off the field.
Just 10 months after he signed a $40 million contract with the Patriots in 2013, with the promise of becoming a superstar, the body of a friend who had been shot multiple times was discovered. Mr. Hernandez was convicted of the friend’s murder, and later accused in two other killings from 2012. Just days after an acquittal in that case, he hanged himself with a bedsheet in his prison cell.
The researchers did not make a direct link between Mr. Hernandez’s violence and his disease.
But C.T.E. is often marked by problems with controlling aggression and impulses, and some degree of dementia, as well as mood swings, lapses in judgment and a disorganized manner.
Mr. Hernandez’s estate filed a federal lawsuit on Thursday against the N.F.L. and the Patriots seeking damages to compensate his 4-year-old daughter for the loss of her father. The suit alleges that the league and the team knew that repeated head hits could lead to brain disease, yet did not do enough to protect Mr. Hernandez from those hits.
The lawyer, Jose Baez, said the family was also contemplating suing the N.C.A.A. and the University of Florida, where Mr. Hernandez played before playing for the Patriots.
The N.F.L. did not comment on the medical finding, and it declined to comment on the suit. The Patriots declined to comment. Soon after his arrest in 2013, the team distanced itself from him, buying back more than 1,200 Hernandez jerseys from fans.
The trauma to Mr. Hernandez’s brain raises fresh questions about the dangers of playing tackle football. This week, other researchers at Boston University published research that found that adults who began playing tackle football before they were 12 years old developed more cognitive and behavioral problems later in life than those players who started tackle football after they reached that age.
Aaron Hernandez, the former New England Patriots tight end and a convicted murderer, was 27 when he committed suicide in April. Yet a posthumous examination of his brain showed he had such a severe form of the degenerative brain disease C.T.E. that the damage was akin to that of players well into their 60s.
It was, a lawyer for his family said, in announcing the findings on Thursday, “the most severe case they had ever seen in someone of Aaron’s age.”
C.T.E., or chronic traumatic encephalopathy, has been found in more than 100 former N.F.L. players, some of whom committed suicide, according to researchers at Boston University.
Yet the results of the study of Mr. Hernandez’s brain are adding another dimension to his meteoric rise and fall that could raise questions about the root of his erratic, violent behavior and lead to a potentially tangled legal fight with the N.F.L., the most powerful sports league in the United States.
The league had already faced public relations problems after other high-profile players were found to have C.T.E., including Junior Seau, Ken Stabler and Frank Gifford. Mr. Seau — along with Dave Duerson, Andre Waters and Ray Easterling, among others — killed himself.
For years, Mr. Hernandez was held up as a particularly egregious example of N.F.L. players running amok off the field.
Just 10 months after he signed a $40 million contract with the Patriots in 2013, with the promise of becoming a superstar, the body of a friend who had been shot multiple times was discovered. Mr. Hernandez was convicted of the friend’s murder, and later accused in two other killings from 2012. Just days after an acquittal in that case, he hanged himself with a bedsheet in his prison cell.
The researchers did not make a direct link between Mr. Hernandez’s violence and his disease.
But C.T.E. is often marked by problems with controlling aggression and impulses, and some degree of dementia, as well as mood swings, lapses in judgment and a disorganized manner.
Mr. Hernandez’s estate filed a federal lawsuit on Thursday against the N.F.L. and the Patriots seeking damages to compensate his 4-year-old daughter for the loss of her father. The suit alleges that the league and the team knew that repeated head hits could lead to brain disease, yet did not do enough to protect Mr. Hernandez from those hits.
The lawyer, Jose Baez, said the family was also contemplating suing the N.C.A.A. and the University of Florida, where Mr. Hernandez played before playing for the Patriots.
The N.F.L. did not comment on the medical finding, and it declined to comment on the suit. The Patriots declined to comment. Soon after his arrest in 2013, the team distanced itself from him, buying back more than 1,200 Hernandez jerseys from fans.
The trauma to Mr. Hernandez’s brain raises fresh questions about the dangers of playing tackle football. This week, other researchers at Boston University published research that found that adults who began playing tackle football before they were 12 years old developed more cognitive and behavioral problems later in life than those players who started tackle football after they reached that age.
