In 2005 William Sheehan and William Mercer combined their expertise to strengthen and diversify Chicagoland Investigative Services. With a combined total of over forty-years in investigation you can rest assured that you are getting the experience that you are paying for and that you can count on that experience in the handling of your assignments. With a wide range of Investigative Vendors that is available to you, we want to provide you with better attention and service than what is already being offered out there. You can reach can reach our management team at anytime by calling William Sheehan at (708) 217-8887 or William Mercer at (708) 906-3634.

To provide the Insurance and Legal Communities in the Greater Chicago area, Northwest Indiana and Central Illinois with the finest investigative services available. Instead of offering a wide range of investigative services our company will focus its expertise to Surveillance, Process Service and General Investigations. General Investigations focus on the location and interviewing of witnesses, accident scene investigations and the review of official and court records. These services are offered at all inclusive hourly rates so that at the time of the assignment you will know what you are getting without having to worry about add-on fees and charges for creating our file, travel time, postage, reporting costs, mileage, phone usage and data base searches. The only add-on fees that we do charge for are parking and the cost of documents obtained that you requested. We want to be known as the firm that you count on for the RESULTS that you need.