MSI Detective Services provides discreet surveillance investigations in Chicago and the surrounding area. Since 1959, our agency has helped individuals, businesses, attorneys and insurers document activity and develop facts relevant to their cases.
Assignments may involve a single investigator or a coordinated team, depending on the location, schedule and objectives. We review your situation before recommending a practical approach.
Surveillance for Personal, Business and Legal Matters
- Infidelity and marital concerns
- Child custody matters
- Insurance claims, workers’ compensation and personal injury matters
- Business misconduct and noncompete investigations
- Theft and loss investigations
- Civil and criminal case support
- Activity and employment inquiries, background investigations and due diligence
Documenting Activity Discreetly
Our investigators use video and photographic documentation when conditions allow. Equipment may include long-range, low-light and hidden cameras appropriate to the assignment, along with specially equipped surveillance vehicles.
We focus on what can be observed and documented. Weather, access, lighting and a subject’s behavior affect the information available. Surveillance cannot guarantee that a particular event will occur or be recorded within a set number of hours.
Planning Your Assignment
We discuss the purpose of the investigation, relevant locations, likely time periods and the information you already have. Our network supports assignments beyond Chicago, including national and international matters when appropriate.
For pricing, minimum hours, mileage, scheduling and consultation preparation, visit our surveillance consultation guide. Call for current pricing and availability.
Request a Confidential Consultation
Call (773) 404-7400 or toll free at (888) 338-4545 to discuss your assignment. You can also explore our full range of investigation services.

