It's a bird, it's a plane, no... it's....

Mary K. Butler, a senior trial attorney with the Public Integrity Section who is now involved in the Mutual Benefits case that has been all secretive...

Jon Burstein from the Sun-Sentinel has more:

The U.S. Department of Justice has called on a tenacious veteran prosecutor to help handle a grand jury investigation into public corruption in Florida — a top-secret inquiry related to a Fort Lauderdale business that authorities suspect was a colossal fraud.Accusations against current and former public officials presented to the grand jury are so explosive that careers could be ruined if they are made public before the investigation is complete, a federal judge said this month.At least six past and present public officials have already been cleared of wrongdoing.The federal grand jury's existence came to light in April when U.S. District Judge Adalberto Jordan, rejecting a request from the Sun Sentinel, ruled he was going to keep about 30 court filings in a criminal case involving Mutual Benefits Corp. hidden from public view.

Here's more on Butler:

Butler's involvement is an indication the grand jury inquiry is an important and complex one. No stranger to high-profile prosecutions, she recently led the federal government's successful case against super-lobbyist Jack Abramoff for influence-peddling on Capitol Hill.Before going to Washington, Butler worked at the U.S. Attorney's Office in Miami, where she won a reputation as a dogged, successful prosecutor with the public corruption section.Notably, she handled Operation Greenpalm, a 1996 bribery scandal that led to the criminal convictions of Miami's city manager, Cesar Odio, and Miami City Commissioner Miller Dawkins.