Dr Daniel Pearl of Potomac MD has discovered that Vets who have been subjected to a supersonic compression wave explosion receive such damage to the interface between the grey matter and white matter of the brain that the resulting scarring compels them to commit suicide.

Severe car accidents leading to brain injury has no such component scarring.

From a very limited sample size I must concur with Dr. Pearl.

There is no existing therapy for brain CMT injury over decades suffered by football players. The supersonic pressure wave injuries occur within a few years.