• The Team at Advanced Investigative Services, Inc

    Advanced Investigative Services, Inc was founded in 1996 by William R. Barrett, a retired Illinois State Police Captain with over 41 years of experience. In fact, our organization has been rapidly growing, becoming the premier investigative agency in the Midwest. The way we achieved this goal is by strategically placing experienced and licensed professionals who aggressively pursue every facet of an investigation in key geographic areas we service. Currently, our staff consists of 27 licensed investigators, with the majority of them coming from investigative backgrounds across the local, state, and federal levels.

  • Security Operations

    Our security operations are directed by a former member of the United States Marine Corps. He also served within the Illinois State Police and offers experience, integrity, and a commitment to our clients. As an experienced managerial professional, he ensures the timely operation of all security activities. When our security and investigative operations are paired, it allows our agency a very valuable platform to provide our clients with an unlimited amount of options. Additionally, our technical team can install the latest in cameras and other modern technology to provide our clients with 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.

  • Intellectual Property Unit

    Advanced Investigative Services, Inc’s Intellectual Property Unit is managed by a highly motivated and experienced leader who has developed multiple positive relationships amongst managers in various industries around the world, which enables us to represent the elite trademarked holders. Within our region, we can 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.

  • Our Clients

    The clients of Advanced Investigative Services, Inc include law firms, governmental agencies, large corporations, insurance companies, workers' compensation management companies, and other varied 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.