The indictment follows a multi-year investigation, which concluded that the firm engaged in "pervasive" and "substantial" insider trading, led to the arrest of several employees, and forced the investment firm to pay more than $600 million in a civil settlement. Interestingly, the indictment does not include SAC's prominent founder and chief, Steven Cohen. But, if SAC was truly committed to insider trading, is it plausible that Cohen did not know about it?