Tmz is reporting that it's a self inflicted gun shot wound to the chest, just like Dave Duerson. I'll be very curious what a brain scan is going to show. If he does have concussion syndrome brain damage, this is going to be really bad for the NFL. Seau was a much bigger star than Duerson. The NFL ( and football in general) is going to have to take really seriously the damage the sport does to the brains of it's players, for the health of the game as a whole. Such sad news.