Oops. Didn't mean to put across that CTE is a disease common among killers. It certainly is not. Just that CTE may be more common in football players than expected. CTE is a degenerative brain disease and depending on where the damage is in the brain, would determine the effects. A person could demonstrate fits of rage and aggression and if that person lost the ability to empathize, the person could likely be capable of murder several times over. As such, I do believe CTE could be a root cause for Aaron Hernandez becoming a killer. The brain damage could have created what we see as a predisposition toward violence and murder.
In any case, the entire pathway from pee-wee football through to the NFL should now be looked at. CTE could be effecting former high school and college players too. We don't know because you have to dissect the brain and specifically look for it and that isn't a normal procedure.
In the Aaron Hernandez case, if a link is proven or even strongly believed that CTE had anything to do with the outward murder of people and not relegated only to suicidal behaviors, tackle football as we know it is in trouble.
And yes I do believe a few players including RW are testing out a new helmet designed with the specific intention of reducing concussion and thus the onset of CTE.