| Business | Phone |
| American Guard Investigations 3610 Buttonwood Dr # 200, Columbia 65201 | (573) 886-8933 |
| Dares Intl 2000 E Broadway # 307, Columbia 65201 | (573) 442-0337 |
| Rockhard Investigations 604 Nebraska Ave, Columbia 65201 | (573) 876-7423 |
| Professional Investigative S Po Box 30744, Columbia 65205 | (573) 445-4100 |
| Investigative Property Dept Columbia 65201 | (573) 874-3142 |