P.O. Box 22
Nashville, IL 62263
Phone: 618-327-9526
Toll free: 800-995-7717
Fax: 618-327-9070

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Our Team & Firm Background

AIS was founded in 1996 by William R. Barrett, a retired Illinois State Police Captain, who has over 41 years of varied and complex investigative experience. The organization has rapidly grown to become the premier investigative agency in the Midwest by placing experienced, professional, and aggressive investigators throughout the area of coverage. The current staff consists of over 27 licensed investigators, who are primarily from investigative backgrounds at the local, state and federal levels.

Our Security operations are directed by an experienced managerial professional from the State of Illinois government, who served in the U.S. Marine Corp, and with the Illinois State Police. This manager insures the integrity and timely operation of all security activities. When our security and investigative operations are coupled, it provides our agency a very valuable platform from which to provide clients unlimited options. Additionally, our technical team is able to install the latest cameras and other newly developed technology, which provides our clients peace of mind regarding the monitoring of a variety of locations, as well as the ability to access all cameras on a real time basis via the Internet.

Our Intellectual Property unit is managed by a very highly motivated and experienced leader, who has developed very positive relationships with managers in various industries throughout the world, which, in turn, allows us to represent the elite trademarked holders. Within our coverage area, we are able to coordinate civil and criminal actions, as required by the client. We have worked numerous cases with Federal and local law enforcement agencies, including the U.S. Immigration and Customs Agency, which has produced exceptional results in seizures and prosecution.

The clients of Advanced Investigative Services are varied and include law firms, governmental agencies, and numerous large corporations, as well as various insurance companies, numerous workers compensation management companies, and other like companies and organizations. Many investigative efforts, at the request of the client, have been coordinated with law enforcement agencies and have resulted in significant arrests.

Numerous references are available upon request from a variety of manufacturers, attorneys, corporate managers, etc.

Illinois: 117-000899
Indiana: PI20700065
Kansas: A-5205
Kentucky: 167673
Missouri: 2010019307
Tennessee: 00001951
Illinois Security Agency License: 122-001103