"In 1994 the U.S. Court of Appeals decided in the case of Oliver North to permit the release of grand jury evidence, because it had already been so thoroughly leaked"

This quote is describing the case of Oliver North, a previous U.S. Marine Corps Lieutenant Colonel who was involved in the Iran-Contra affair. In 1994, the U.S. Court of Appeals decided to permit the release of grand jury proof in the event, in spite of the fact that the evidence had already been dripped to the public. This choice was most likely made in order to ensure that the public had access to all of the evidence in the event, and to guarantee that the proceedings were carried out in a reasonable and transparent manner. The choice to launch the proof was likely also made to avoid any more leakages of the proof, as the court wanted to ensure that all of the evidence was presented in a controlled and organized way. This decision was likely a hard one for the court to make, as it was a departure from the standard practice of keeping grand jury evidence personal.