I'm betting you he did that so they can study his brain.
I bet you you're absolutely right man. Think about it. Everyone knew the dude was having some mental issues, especially after he drove off a cliff or whatever a few years back. So I bet this time he said fu*k it. I'm done, not taking chances anymore, but I bet he suffered for a bit. Shooting yourself in the chest is not an instantaneous thing, like shooting yourself in the head probably would be. They better study his brain, figure out if the same things were wrong with his brain, as that dude who donated his brain to studies. What was that dudes name??? He died of some disease or something, and gave permission for scientists to study his brain??
.....Sad day for NFL.....