It seems the prospect of gigabytes of e-mail and other documents from financial institutions can be viewed one of two ways: as a treasure trove for regulators to scrutinize — or as an embarrassment for the United States government, which has spent millions of dollars investigating Wall Street in the last two years without a scalp to show for it.

Don't have probable cause? Steal the data and send it to Julian Assange - we leaked it becomes admissible in court! Problem solved!