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 Dec. 10, 2024 — Chinese national and U.S. legal permanent resident charged for illegal scheme to export controlled data and defraud the Department of Defense Dec. 9, 2024 — Denver man indicted on 18 counts for defrauding investment clients Dec. 9, 2024 — Former tax preparer pleads guilty to theft of tax refunds More press releases