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 3, 2024 — Former Wise County man sentenced for income tax-related fraud May 3, 2024 — Marrero bookkeeper pleads guilty to fraud and tax charges May 3, 2024 — Two men sentenced for defrauding JetBlue More press releases