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Division of Criminal Investigation

Welcome to the Division of Criminal Investigation (DCI). DCI is comprised of eight Investigative Zones throughout the state with DCI Special Agents investigating crimes such as homicide, sexual assault, crimes against children, public integrity crimes, gun crimes, human trafficking, and illegal drug trafficking. DCI also includes many of the specialty functions of the Illinois State Police including the Special Operations Command (Special Weapons and Tactics Teams (SWAT), Crisis Negotiation Team (CNT), and Statewide Weapons of Mass Destruction Team (SWMDT), and Air Operations), the Traffic Crash Reconstruction Unit (TCRU), the Intelligence Command, the Medicaid Fraud Control Bureau (MFCB), the Special Investigation Unit, and the Gaming Command.

DCI Special Agents participate in demanding and continuing training throughout their careers. Once selected for an assignment within the Division, Special Agent Candidates participate in a one year Field Training Agent Program and attend the DCI New Agents School. In-service training continues throughout the career of a DCI Special Agent. Special Agents are trained in the use of state of the art equipment, technology, and methods in conducting independent investigations and supporting, assisting, and cooperating with federal and local law enforcement investigations.

The contact number for the Division of Criminal Investigation administrative office is 217-782-1320.

To report a crime, please contact the appropriate law enforcement authorities, or send an email to If you wish to remain anonymous, you may contact your local Illinois State Police patrol district by clicking on the following link: ISP District. If the information you have is an emergency, please call 911 immediately.