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 February 25, 2021 — Three individuals charged with federal tax offenses February 25, 2021 — Construction contractor sentenced to 41 months for conspiring to commit mail and wire fraud and defrauding the U.S. Treasury February 25, 2021 — Former Cape Cod bookkeeper sentenced for embezzlement charges in two criminal cases More press releases