The FBI has made public corruption it’s number one criminal priority
"the FBI has made public corruption it’s number one criminal priority."
https://fbiretired.com/skillset/fbi-public-corruption/
"Public corruption is a breach of trust by federal, state, or local officials—often with the help of private sector accomplices. It’s also the FBI’s top criminal investigative priority. To explain why the Bureau takes public corruption so seriously and how we investigate, we talked with Special Agent Patrick Bohrer, assistant section chief of our Public Corruption/Civil Rights program at FBI Headquarters.
Question: Why is public corruption so high on the FBI’s list of investigative priorities?
Answer: Because of its impact. Corrupt public officials undermine our country’s national security, our overall safety, the public trust, and confidence in the U.S. government, wasting billions of dollars along the way. This corruption can tarnish virtually every aspect of society. For example, a border official might take a bribe, knowingly or unknowingly letting in a truck containing weapons of mass destruction. Or corrupt state legislators could cast deciding votes on a bill providing funding or other benefits to a company for the wrong reasons. Or at the local level, a building inspector might be paid to overlook some bad wiring, which could cause a deadly fire down the road."
https://archives.fbi.gov/archives/news/stories/2010/march/corruption_032610
"Attorneys in the Public Corruption and Civil Rights Section prosecute impactful cases aimed at preserving the government’s integrity, reforming corrupt behavior, and protecting citizens’ constitutional rights. The Section works in close partnership with the FBI and other investigative agencies to achieve its goals.
The Section’s public corruption work involves the investigation and prosecution of bribery, extortion, fraud, and embezzlement committed by elected and appointed officials, government employees, and those doing business with city, state, and federal government. The Section handles a variety of civil rights cases, including allegations that law enforcement officers used excessive force against citizens and allegations of hate crimes."
https://www.justice.gov/usao-cdca/criminal-division/public-corruption-and-civil-rights-section
Does the FBI investigate graft and corruption in local government and in state and local police departments?
https://www.fbi.gov/about/faqs/does-the-fbi-investigate-graft-and-corruption-in-local-government-and-in-state-and-local-police-departments