Ken Belson in the NYT: Aaron Hernandez, the former New England Patriots tight end who committed suicide in April while serving a life sentence for murder, was found to have a severe form of C.T.E., the degenerative brain disease linked to repeated head trauma that has been found in more than 100 former N.F.L. players. Researchers who examined the brain determined it was “the most severe case they had ever seen in someone of Aaron’s age,” said a lawyer for Hernandez in announcing the result at a news conference on Thursday. Hernandez was 27. C.T.E., or chronic traumatic encephalopathy, can be diagnosed only posthumously. Hernandez is the latest former N.F.L. player to have committed suicide and then been found to have C.T.E., joining Dave Duerson, Junior Seau, Andre Waters, Ray Easterling and Jovan Belcher, among others. Seau and Duerson shot themselves in the chest, apparently so that researchers would be able to examine their brain. Hernandez was found hanging in his prison cell. ...