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 March 17, 2023 — El Dorado County couple found guilty of tax fraud March 16, 2023 — Alexandria small business owner pleads guilty to 900,000 dollar tax fraud March 16, 2023 — Former Macomb County Public Works commissioner Anthony Marrocco sentenced to prison for extortion More press releases