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 May 24, 2024 — Former physician sentenced for operating a pill mill May 24, 2024 — Springfield man indicted for timeshare fraud scheme May 24, 2024 — KC daycare owner sentenced for $772,000 fraud scheme More press releases