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 21, 2024 — Flight attendant and two bank employees charged in federal indictment of alleged Mexico-based drug trafficking organization May 21, 2024 — Dark web drug vendor and clandestine lab manufacturer sentenced to prison for trafficking in methamphetamine and fentanyl May 21, 2024 — Man sentenced for laundering over $4.5m obtained from business email compromise and romance fraud schemes More press releases