| Business | Phone |
| Investigators 1044 S 11th Ave, Wausau 54401 | (715) 842-1113 |
| Johnsen & Assoc Inc Po Box 1443, Wausau 54402 | (715) 849-2404 |
| L B Investigations Po Box 247, Wausau 54402 | (715) 849-8980 |
| R P Polygraph Svc & Rp Prvt 1101 Hollibush Ln, Wausau 54401 | (715) 355-7233 |