| James J. Wedick & Associates | Gold River, CA | 916-638-3566 |
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| Verdict Resources, Inc. | nationwide | 888-800-8895 |
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| Marin Associates | San Rafael (San Francisco), CA | 415-454-4558 |
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| Investigative Resources International | nationwide | 800-252-5853 |
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| DTIS | nationwide | 402-438-6393 |
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| Gietzen & Associates, Inc. | nationwide | 888-779-2345 813-223-3233 |
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| Kalmbach and Associates | nationwide | 888-540-0601 |
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| The Legal Support Investigative Service | Whittier, CA | 888-799-LSIS |
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| The John Haus Group (Va. DCJS 11-3303) | nationwide | 1-866-788-7010 |
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| Hodson and Associates Investigations | Orange County, CA | 714-773-5345 |
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| L.S.S. Consulting Inc. Legal and Security Strategics | nationwide | 248-366-5020 |
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| The Intelligence Group | nationwide | 908.901.0112 |
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| Martino Consulting & Investigative Services Inc. | Mission Hills, CA | 818-472-0374 |
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| David L. Warkentine-Private Investigator/Polygraph | Channel Islands Harbor, CA | 805-653-6626 |
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| New Technologies Investigative Services | Orange, CA | 877-SPY-NTIS or 877-779-6847 |
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| CDS Group International LLC | nationwide | 402-462-9966 |
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| Gladding & Michel, Investigative Offices | Burlingame, CA | 650-692-1140 |
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| Tri-County Private Investigations of Missouri | nationwide | 816-407-1213 |
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| IPSA Intenational, Inc. | nationwide | (510)748-1234 |
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