From the Washington Post:
Herbert J. “Jack” Miller Jr., who led the Justice Department’s war on organized crime in the 1960s and later brokered the pardon of President Richard M. Nixon and prevented the release of Nixon’s White House tapes after the Watergate scandal, died Nov. 14 at Shady Grove Adventist Hospital in Rockville of renal failure after being treated for influenza. He was 85.
Mr. Miller was chosen by Robert Kennedy to lead the Justice Department’s criminal division, with an emphasis on organized crime. He won a conviction in 1964 against Hoffa for jury tampering and led the successful prosecution of Bobby Baker, a Senate secretary and close Lyndon B. Johnson associate, for influence peddling.
The Post also has an entry on its Post Mortem blog by Matt Schudel, the author of the obituary, that offers further background on Miller.