This is what a lot of people, myself included, suspected after his suicide. I remember threads here and other places with posters rallying against people assuming it was CTE, but with the new emphasis on neurological health over the past decade, anyone who had been paying attention knew where this was headed from the beginning. Seau is one of the more high profile athletes to have this confirmed, I wonder if we see a new wave of people donating their brain to science (like Lofa). Either way, this doesn't necessarily prove that CTE caused Seau to kill himself, but definitely another point of data to add to the growing list.