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 9, 2024 — Retail theft ringleader sentenced May 9, 2024 — Springfield man sentenced for heroin conspiracy May 9, 2024 — Johnstown man sentenced to 12 years in prison for trafficking large quantities of fentanyl, heroin, methamphetamine, cocaine, and crack More press releases