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 June 5, 2024 — Two partners of Westchester accounting firm plead guilty to tax fraud conspiracy June 5, 2024 — Michigan business owner sentenced for tax evasion and obstructing the IRS June 5, 2024 — Year-long wiretap investigation results in four arrests and kilogram seizures of fentanyl, methamphetamine, heroin, and cocaine More press releases