Internal Investigation Directory
| Deputy Director's Office (Suite 100 – N) | (217) 782-5423 |
| Identified Offender Program | (217) 558-3737 |
| Background Unit | (217) 524-8998 |
| Northern DII Command | (847) 294-4466 |
| Southern DII Command | (217) 782-8744 |
To best assist with contacting the correct jurisdiction, please use the map to determine which Command to contact.
