Over 42 years of Investigation and Polygraph experience Whether seeking expert polygraph (lie detection) "polygraph examination", criminal, civil, domestic or private investigations or any type, Vision Investigative Services consistently meets and exceeds the needs of all of its clients. Over four decades of experience in all areas of private investigation places our firm and its investigators in the forefront in talent, knowledge and experience in the investigative field. Located in Sonoma County in the City of Santa Rosa, we provide national service to clients from San Francisco, to New York and westward to the Hawaiian Islands. Take a moment and view the links on this page to familiarize yourself with our services and investigator qualifications. It will be our great pleasure t