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 2, 2024 — Two men sentenced to prison as part of federal investigation that dismantled Mexico-to-Chicago drug pipeline May 2, 2024 — Man pleads guilty to defrauding COVID-19 relief programs and commercial equipment lenders May 2, 2024 — Son of leader of Rodriguez drug trafficking organization sentenced to 10 years for his role in large fentanyl conspiracy More press releases