Scruggs maintained Gorelicks walls between the FBI and Justice's Criminal Division by threatening to automatically reject any FBI request for a wiretap or search warrant if the Bureau contacted the Justice Department's Criminal Division without permission.
Good link - it is also available here at FR, not surprisingly, on the posts:
We are letting the Left control the terms - it's
not the Wall ! . It was the conversion of the legally intended and well established
door in that wall into a bureaucratic maze of sand traps and bear traps, with all roads leading to the decadent Roman emperor.