Many of the destroyed files involved companies and individuals who would later play prominent roles in the economic meltdown of 2008. Two MUIs involving con artist Bernie Madoff vanished. So did a 2002 inquiry into financial fraud at Lehman Brothers, as well as a 2005 case of insider trading at the same soon-to-be-bankrupt bank. A 2009 preliminary investigation of insider trading by Goldman Sachs was deleted, along with records for at least three cases involving the infamous hedge fund SAC Capital.

Grassley learned that over the past decade, FINRA had referred 19 complaints about suspicious trades at SAC to federal regulators. Curious to see how many of those referrals had been looked into, Grassley wrote the SEC on May 24th, asking for evidence that the agency had properly investigated the cases. Two weeks later, on June 9th, Khuzami sent Grassley a surprisingly brusque answer: “We generally do not comment on the status of investigations or related referrals, and, in turn, are not providing information concerning the specific FINRA referrals you identified.” Translation: We’re not giving you the records, so blow us.