| Business | Phone |
| Pinkerton Consulting/Invstgtns 20 S Clark St, Chicago 60603 | (312) 236-6363 |
| Mc Cord & Assoc 25 E Washington St 1333, Chicago 60602 | (312) 984-0404 |
| Vocational Economics 70 W Madison St 1400, Chicago 60602 | (312) 781-9125 |
| Investigative Research Cnsltnt 191 N Wacker Dr, Chicago 60606 | (312) 578-8600 |
| John E Reid & Assoc Inc 209 W Jackson Blvd 400, Chicago 60606 | (312) 876-1600 |
| Kennealy & O'Callaghan Invstgn Chicago 60609 | (773) 445-4164 |
| Troy Group Inc 980 N Michigan Ave, Chicago 60611 | (312) 595-9810 |
| Midwest Claims Evaluation 1202 W Montana St, Chicago 60614 | (773) 348-4436 |
| Mwf Investigative Svc Chicago 60631 | (773) 775-5564 |
| Mitchell J Radycki Ltd 4913 S Tripp Ave, Chicago 60632 | (773) 582-6421 |
| Pat Burns Investigations Inc 5226 S Mulligan Ave, Chicago 60638 | (773) 581-0050 |
| M & M Consultants 6263 N Leona Ave, Chicago 60646 | (773) 763-1495 |
| Investigative Services Agency 1 E Wacker Dr 3605, Chicago 60601 | (312) 755-9700 |
| Kam Data Svc Inc 35 E Wacker Dr, Chicago 60601 | (312) 422-1500 |
| Us Investigations Svc 233 N Michigan Ave 1330, Chicago 60601 | (312) 353-2740 |
| Victor H May 200 N Michigan Ave, Chicago 60601 | (312) 236-6233 |
| Andrews & Assoc 33 N Dearborn St 600, Chicago 60602 | (312) 606-0222 |
| Lasker Investigations 134 N La Salle St 1508, Chicago 60602 | (312) 332-2522 |
| Northern Investigations Inc Chicago 60602 | (312) 630-9578 |
| Prism Innovative Resources 70 W Madison St, Chicago 60602 | (312) 422-0800 |
| Victor H May Investigations 9 N Wabash Ave, Chicago 60602 | (312) 236-2408 |
| Jack Burke & Assoc Ltd 19 S La Salle St, Chicago 60603 | (312) 372-5500 |
| Case Knowledge 208 S La Salle St 640, Chicago 60604 | (312) 201-0343 |
| Duplica Inc 228 S Wabash Ave, Chicago 60604 | (312) 360-9700 |
| Investigative & Surveillance Chicago 60604 | (312) 939-1800 |
| Robert Swanson 53 W Jackson Blvd, Chicago 60604 | (312) 212-1390 |
| Intrepid Investigations 205 W Randolph St 1310, Chicago 60606 | (312) 332-2267 |
| Scott Forrest Stern & Assoc 205 W Randolph St 1210, Chicago 60606 | (312) 853-2150 |
| Professionals Detective Agency 20 N Sangamon St, Chicago 60607 | (312) 226-1640 |
| Us Investigations Director 610 S Canal St 800, Chicago 60607 | (312) 886-5408 |
| Official Fingerprint Provider 1714 S Ashland Ave, Chicago 60608 | (312) 942-1200 |
| Vander Wheel Group 211 E Ontario St 1800, Chicago 60611 | (312) 283-5400 |
| Isc Chicago 60614 | (773) 281-0681 |
| James Ousley 2101 S Michigan Ave, Chicago 60616 | (312) 326-1766 |
| Patrick & Assoc Detective Agcy 8213 S Exchange Ave, Chicago 60617 | (773) 374-6950 |
| Loop Detective & Security 532 E 88th St, Chicago 60619 | (773) 224-9544 |
| Execu Pro Investigations 709 W 81st Pl, Chicago 60620 | (773) 873-0901 |
| Kate's Detective & Security 7810 S Claremont Ave, Chicago 60620 | (773) 436-3910 |
| Michael A Jones Pvt Detective 4342 W Washington Blvd, Chicago 60624 | (773) 287-5020 |
| Star Planet Intl Detectives 11444 S Halsted St, Chicago 60628 | (773) 568-9800 |
| Spyglass Pre-Employment 3721 W 61st Pl, Chicago 60629 | (773) 581-0180 |
| Vanella Inc 8745 W Higgins Rd, Chicago 60631 | (773) 693-6220 |
| Vantrease Security & Invstgtn Chicago 60639 | (773) 237-2182 |
| Investigators Of Illinois 3000 N Cicero Ave, Chicago 60641 | (773) 286-1406 |
| P I Svc Chicago 60641 | (773) 202-8828 |
| Millenium Investigations Chicago 60643 | (773) 233-2212 |
| O'Brien & Assoc 10540 S Western Ave 204a, Chicago 60643 | (773) 881-0343 |
| International Criminology Entr 3239 W Le Moyne St, Chicago 60651 | (773) 276-9802 |
| Ryan Lawrence Investigations 10564 S Lawndale Ave, Chicago 60655 | (773) 239-5090 |
| Ifpc Worldwide Inc 5440 N Cumberland Ave 105, Chicago 60656 | (773) 794-9922 |
| Meyers Service Inc 3221 N Ashland Ave 2w, Chicago 60657 | (773) 704-7400 |
| Raal 5820 N Whipple St, Chicago 60659 | (773) 878-0523 |
| Investigative Research 650 W Lake St, Chicago 60661 | (312) 463-1070 |