| Business | Phone |
| Unlimited Investigations 28406 Harper Ave, St Clair Shores 48081 | (586) 412-4600 |
| Seaway Agency Inc 29305 Jefferson Ave, St Clair Shores 48081 | (586) 415-5519 |
| Pursuit Investigations Inc 28762 Harper Ave, St Clair Shores 48081 | (586) 445-6790 |
| J-Mack Agency 29305 Jefferson Ave, St Clair Shores 48081 | (586) 293-3918 |
| Jmk Investigations St Clair Shores 48082 | (586) 294-3630 |