| Business | Phone |
| Associated Legal Investigators Po Box 2810, Tualatin 97062 | (503) 892-2507 |
| Robert Associates Group Llc Tualatin 97062 | (503) 885-2533 |
| Corson & Assoc Inc 5515 Sw Delker Rd, Tualatin 97062 | (503) 638-8095 |
| Coumbia Investigations Inc Tualatin 97062 | (503) 692-4684 |
| Nighthawk Investigations Ltd Tualatin 97062 | (503) 638-6130 |
| Gideon Forensic Investigations Po Box 116, Tualatin 97062 | (503) 643-1844 |