Possibly. It appears evidence was covered up, lied about, or both. The issue isn’t so much the injuries as players weren’t told about them. As a result, the injuries got worse, violence occurred, and suicides occurred. Look at Aaron Hernandez, Junior Seau, and Dave Duerson. Hernandez likely killed several people. Seau and Duerson both committed suicide. These are just a few examples.
A lot more cases will be uncovered. Colleges and Universities are also fair game.
The old question what did you know, and when did you know it? At least to start, this is the key inquiry.