So how do you know the guy in the car didn't say the same thing? Be careful there, it's not like the FBI is going to investigate the FBI. Any agency which might hear your grievance would be under the DOJ as well.
In the Spring of 2001 the DOJ had launched an investigation into the former U.S. Attorney for Maryland, Lynne Battaglia,(now a MD. Court of Appeals judge) her Chief of White Collar Crimes, Dale Kelberman and the Head of the Maryland State Police,David B. Mitchell for alleged corruption.
I haven't heard anything about the outcome of this DOJ investigation so it may be closed or still active.
If the U.S. Attorneys are corrupt,so are the FBI agents that worked under them, they go hand in hand.