Lawrence Ryan Investigation (LRI) has been serving the Chicago area for 42 years. As a top reviewed private investigation firm, LRI helps individuals, businesses, and lawyers get answers they need. We are widely recognized as not only the most effective and top private investigators in Illinois but also the most discreet and confidential. Your privacy and protection is our number one concern. Why do we go to such great lengths to be the most confidential private investigators in Chicago? In addition to ensuring your anonymity and safety, it is also critical to a successful investigation.