I am some random person on the internet, so caveat emptor. That being said, my girlfriend has a family friend who works in health research. Since she was looking for a new job in roughly the same field, she reached out and exchanged a few emails, had coffee. Normal networking stuff. One of the projects that the family friend was involved with was doing concussion research for the NFL in the aftermath of the PBS's League Denial, and Mark Fainaru-Wada and Steve Fainaru's work more generally.

Fast forward a few months after the exchanges, she was included on an email from that family friend where the they complained that they should've known better to work on this research and that they were enraged that the conclusions were being suppressed / minimized.

See Dr Omalu research about CTE: https://en.wikipedia.org/wiki/Bennet_Omalu

There is a movie (biopic not totally accurate) : Concussion

Thanks, this looks like a good start.