Actually, the stories of FBI corruption are legion.
From Whitey Bulger, the Atlanta bombing frame-up, that group of men falsely convicted of murder that Mueller was aware of, the Comey group (directly implicated dozens of agents), their failures to investigate antifa, missing terrorists like the Boston Bombers when the Russians were screaming at us about them (when that happened, Obama’s first comment was wondering if it was a tax protest,) it just goes on and on.
The nature if the agency now is thouroughly corrupt, and I don’t believe fixable.
I listed a few others on another thread which included having the head of counter intel working for the KGB!