| Michael Wolf Enterprises | Calabasas, CA | (818)591-5986 |
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| James J. Wedick & Associates | Gold River, CA | 916-638-3566 |
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| L.S.S. Consulting Inc. Legal and Security Strategics | nationwide | 248-366-5020 |
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| Hodson and Associates Investigations | Orange County, CA | 714-773-5345 |
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| Investigative Resources International | nationwide | 800-252-5853 |
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| 3rd Degree Investigations, Inc. | nationwide | 919-872-2270 |
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| Pearne Investigation Agency | San Jose, CA | (408) 243-6066 |
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| Tri-County Private Investigations of Missouri | nationwide | 816-407-1213 |
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| Nan-Lee Attorney Services & Investigations | Hayward, CA | (510) 667-9538 |
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| Investigation and Paralegal Group | nationwide | 314-642-6000 |
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| Martino Consulting & Investigative Services Inc. | Mission Hills, CA | 818-472-0374 |
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| Gladding & Michel, Investigative Offices | Burlingame, CA | 650-692-1140 |
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| Gietzen & Associates, Inc. | nationwide | 888-779-2345 813-223-3233 |
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| Parrent Smith Investigation & Research | Los Angeles, CA | 310-275-8619 |
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| Central Coast Investigative Services Incorporated | Salinas, CA | (831) 422-9111 |
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| Empire Surveillance & Investigations | Newport Beach, CA | 800-830-7030 |
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| Verdict Resources, Inc. | nationwide | 888-800-8895 |
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| Arcy Professional Investigations, Inc. | Paradise, CA | 1-877-474-2729 |
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| LandAmerica Information Company | nationwide | 800-368-3380 |
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