| Business | Phone |
| Chayra Investigative Svc Po Box 2363, Mill Valley 94942 | (415) 927-7624 |
| Harold Drady Investigator Po Box 49, Mill Valley 94942 | (415) 662-2276 |
| Jgc Investigation 30 Monte Cimas Ave, Mill Valley 94941 | (415) 381-9320 |
| Price & Mulvihill Invstgtns 242 Redwood Hwy, Mill Valley 94941 | (415) 332-5599 |