I said it in the Smack Shack thread, but many here don't go there (and rightly so). So...
I think he has CTE, like real bad. Didn't this behavior really come to the fore after the Burfect headhunting incident? I'm not convinced the dude is totally responsible for his conduct these days.
Unlike Aaron Hernandez, who was already a gang member before ever getting to the NFL. He may have gotten CTE after, but his behavior was already well established. From what I've read on ESPN and such. I obviously have no personal knowledge of this.