The Australian Federal Attorney-General ordered the Federal Police to raid the Australian Secret Intelligence Organisation in 1973. Awkward.

You're asking for records, maybe the most famous in the U.S. are the audio recordings revealed by the Senate Select Committee on Watergate.

In the U.S., the Federal government will sometimes sue or be sued by individual states, and the legislative branch investigates and impeaches for crime as well as sexual impropriety.

In the United States, every single cabinet-level department, and many non-cabinet-level department have components called an Inspector General's office. An IG's office conducts an internal investigation of their own agency for any malfeasance.

If some issue investigated by an IG's office warranted a criminal as opposed to civil or administrative action, then the relevant law enforcement agency would become ubvikved, such as the FBI. The IG's office might pass the case off to the relevant LE agency, which would then take the case to the United States Attorney's Office with jurisdiction, or the appropriate litigating component of the U.S. Department of Justice's Criminal Division. Either a USAO or Crim Div could then indict the relevant actors.