Division of Internal Investigation

The mission of the Illinois State Police (ISP), Division of Internal Investigation (DII), is to uphold the best interests and confidence of the public, state employees, and all agencies under the Executive Branch of State Government and to promote accountability through fair, impartial, timely, and thorough investigations, while maintaining the highest degree of integrity, professionalism, and excellence during the administrative, background, and criminal processes.

The DII investigates, documents, and reviews allegations of misconduct by members of the ISP, state employees, and all state agencies under the Executive Branch of State Government. Allegations investigated by the DII include, but are not limited to, criminal misconduct, Officer Involved Deaths (OID), Officer Involved Shootings (OIS), and Racial Profiling cases. The DII also investigates incidents in which ISP officers discharge a firearm, whether or not misconduct is alleged. Furthermore, the DII investigates the serious injury or death of persons involved in an incident encompassing ISP personnel.

When investigating OID, OIS, or Racial Profiling cases, ISP personnel from the DII are governed by departmental policies, standard operating procedures, and state laws. The DII investigation will be conducted by Special Agents based in one or more of the six investigative offices throughout Illinois. Additionally, any supplementary resources required to conduct a thorough investigation, such as Crime Scene Investigators, Forensics, Traffic Crash Reconstruction, Air Operations, Public Information Officers, or otherwise, will be called upon as needed.

At the completion of the investigative process, the DII will submit a report detailing all known facts and investigative actions for prosecutorial review by one of the 102 County State Attorney's Offices throughout Illinois. However, in unique circumstances, the Illinois Attorney General or the State's Appellate Prosecutor Offices may review an OIS and OID case file.

Please click here to view the Division of Internal Investigation - Officer-Involved Investigations Dashboard

** The ISP DII does not determine whether an officer's actions were justified or if charges should or should not be issued in any of these investigations. Decisions related to charging solely rest with those state prosecutorial entities previously mentioned.

**Information provided in the Officer-Involved Investigations Dashboard is made available to the general public, media, and other interested parties for informational purposes only. The information reflects the stored and known data at the time of posting, is subject to change and may be redacted to protect the investigations integrity or involved and uninvolved individuals. **