IRS Criminal Investigation (CI) serves the American public by investigating potential criminal violations of the Internal Revenue Code and related financial crimes in a manner that fosters confidence in the tax system and compliance with the law. Report Tax Fraud Identify tax schemes Report tax fraud Voluntarily disclose What We Do About Criminal Investigation What we investigate Investigation process J5: Our international partnership Latest News December 18, 2020 — Former Illinois attorney charged with federal tax offense December 18, 2020 — Federal superseding indictment charges two Baltimore defense attorneys and private investigator for conspiracy to create false records in a federal investigation and to obstruct official proceedings December 17, 2020 — Third Dallas real estate developer charged with bribing city council members More press releases