Fraud Blocker

Private Investigator Chicago IL

Our Service

Chicago's Agency for Private Investigations

CSI provides Chicago Private Investigators and Private Detectives as is recognized as one of Chicago’s premier investigations agencies. CSI’s private investigators continually set the standard for professionalism, discreetness, communication and efficiency. Every detective has the necessary credentials, training and experience to make sure your situation is investigated, communicated and resolved to the highest degree of efficacy and communication possible. If your are looking for child custody, criminal investigations, insurance fraud, surveillance, infidelity & adultery, embezzlement, personal injury, computer and internet forensics, our private investigations division has the right experience, technology and experience to help your situation..

We at CSI handle each and every private investigations case with unparalleled privacy and commitment to resolution. Through the use of technology, our access to police and homeland security databases and solid detective work, we continue to build or reputation as one of the top detective and investigation agencies not only in Chicago but of Illinois. The first consultation is always free of charge

Private Investigators IL Counties

Including the Chicago metropolitan area, we provide private investigation services for cases in the following counties of Illinois: Cook County, DuPage County, Will County, Kane County, McHenry County, De Kalb County, Kendall County & Lake County.

Typical Private Investigation Cases

Most of our experience includes handling PI casework such as: Surveillance, Divorce and Infidelity Investigations, Alimony Reduction, Asset & Bank Searches, Child Custody, Insurance Fraud, Computer Crimes, Personal Injury, Location of Missing Persons, and Witness Investigations.

What a Private Investigator Does

A licensed private investigator's function is to legally obtain the necessary, data, evidence, and surveillance information to arm you or your attorney with the critical information needed to resolve your situation in a timely manner.

Full Service Private Detective & Private Security Contracting Agency

Professional Service of Process Chicago Illinois
We not only provide private investigation services but also top-tier executive protection for esteemed clients. Our bodyguards possess expertise in guerilla tactics to ensure survival and safety during hostile takeovers. However, we also prioritize customer service and hospitality, avoiding overbearing our clients’ guests. We use verbal judo and other de-escalation techniques to create a secure and comfortable environment for our clients.

Our agency offers highly skilled and adaptable private investigators in Chicago, IL, with more than ten years of experience in the industry. We provide tailored services and specialists in different investigative fields, including undercover operations, database research analysis, fraud examination, missing persons investigation, malfeasance detection, and more.

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Private Investigator in the Chicago Area

When You Absolutely Positively Need To Know

When you really have to know, our detectives and investigators are experienced in Background Investigations, Surveillance, Asset Searches, and Trial Preparation id necessary.  All have many years of industry experience and are former State or Federal Law Enforcement personnel.
No matter what your situation is, we can offer you the peace of mind you need to get through that difficult and delicate time in your life. We offer professional investigation services throughout the Chicago area for case such as: Insurance Fraud, Matrimonial Investigations, Infidelity Investigations, Child Custody and Support, Alimony Reduction, Internet Dating, Background Searches, Asset & Bank Searches and any case where surveillance or witness interviewing may be necessary.

Our professional and inconspicuous manner, in which we handle each and every case, truly sets us apart from other agencies. We take great pride in protecting your privacy as well as bringing forth justice and providing closure to those involved in the cases we investigate.

Nationwide Skip Tracing Services

Finding People that Don’t Want to be Found.

Chicago Serve’s Skip Tracing services utilize national consumer and government databases which enable us to locate anyone, anywhere, at nearly any time. No matter whom you are looking for; a lost loved one, a missing witness, or someone that skipped out on their financial obligation, Chicago Serve and investigations will locate them in the quickest and most efficient means possible. We offer several levels of skip tracing and are not limited to the Chicago area.

We collect as much information as possible about your subject, then verify & analyze the data. Our dedicated team of professionals is authorized to employ the most advanced, state-of-the-art people-search software in the industry that is only available to licensed investigators. With skip tracing, we can find people quickly and tell you exactly where that person can be found. Recovery agencies, insurance companies, lawyers, government agencies, social service institutions and banks all rely on Chicago Serve’s skip tracing services to find their person. Give us a call to see how we can help.


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How We Works

See why CSI in Chicago is the top choice for private investigators as well as armed and unarmed security. Call for a free consultation today:

Experienced former Police Detectives


Discreet and Confidential Communications


Fully Licensed, Bonded and Insured


Male and female investigators


First Consultation always FREE


On-Site Background and Federal Agency access