ILLINOIS
| Comprehensive Investigative Services (C.I.S.) | 6351 W. Montrose, #185 | Chicago | IL | 60634 | 800-618-2155 | dennis@detectiveden.com |
| Kevin W. Mc Clain Investigations, Inc. | P.O. Box 1434 | Centralia | IL | 62801 | 618-325-7709 | ispy4u@accessus.net |
| Excel Investigations, Inc. | 7020 Centennial Drive | Tinley Park | IL | 60477 | 708-444-8330 Ext 223 | ken@excelinvestigations.com |
| Don C. Haworth LPD, CFE, CII | 2223 W. Lyndale Suite R-1 | Chicago | IL | 60647 | 773-772-2651 | falconpi@aol.com |
| LPDN, Inc. | 809 Willow Lane | Willowbrook | IL | 60527 | 630-561-9688 | lpdninc@aol.com |
| Pope & Associates | 1155 S. Washington Street | Naperville | IL | 60540 | 630-357-0937 | tpope@investigationforyou.com |
| VTS Investigations, LLC | 79 W. Monroe Street | Chicago | IL | 60603 | 312-553-4464 | bill@pichicago.com |
| Yahnke Professional Services & Investigations, LTD | 2112 W. Galena Blvd, Suite 8-235 | Aurora | IL | 60506 | 630-966-9774 | toni@ypsandi.com |