I can think of a few times that justice prevailed over the FBI/DOJ but not in time to undo the damage. Senator Ted Stevens from Alaska (Judge Emmet Sullivan undercover the FBI’s malfeasance) and the accounting firm Arthur Anderson (85,000 jobs) during the Enron trials. And the 1967 FBI wrongful indictment of four innocent men in MA. Mueller was an assistant US attorney in Boston in the 1980’s as the imprisoned men futilely tried to get their convictions overturned. Mueller after decades still refused to release exonerating evidence that proved their innocence and would not back their release from prison in 2002. In the Greco family’s 2002 plea for a posthumous pardon, their lawyer wrote:

“Louie Greco died an innocent man, despite numerous unheeded pleas of innocence. His innocence was known prior to trial, yet he was tried, convicted and sentenced to death. Now, the truth is being revealed and those responsible are facing a Congressional and Justice Department investigation. It is time for Massachusetts to officially acknowledge the wrong done to Mr. Greco and his family and remove this blot from his name.”

But after receiving the letter from Mueller saying they still could be guilty, the Board rejected the family’s petition in July 2003.

Finally, in the waning days of his administration in December 2014, Gov. Deval Patrick issued a proclamation laying out the facts of the corrupt frame up by the FBI and Greco’s innocence.

“Any stigma and disgrace,” the governor wrote, “is hereby removed.”

In 2018, even after the facts of the FBI cover up were revealed the FBI continued the cover up with the approval and authorization of Director Robert Mueller III. $102 million was award the innocent or their relatives in a civil case.

And then who can forget Richard Jewell and the leaky FBI at its best. Tom Brokaw, "The speculation is that the FBI is close to making the case. They probably have enough to arrest him right now, probably enough to prosecute him, but you always want to have enough to convict him as well. There are still some holes in this case."