ESPN's Outside the Lines reports on a new book relaying the sad history of brain trauma studies and the NFL and mentions stuff that sounds like pretty clear conflicts of interest in publishing, along with some patterns of complete denial by league officials, in 20/20 hindsight. Notable also was a brief recounting of a meeting attended by NFL officials and a representative from the Defense and Veterans Brain Injury Center.
The book, League of Denial, appears to be associated (or is the same as) the PBS Frontline project that originally was a collaboration with ESPN.