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Confidential & Recommended Private Investigator Services Since 1967

Discover more about private investigators capability, employment and regulations in Northbrook.


ICS provides a full range of private investigations in Northbrook, Illinois, which are performed by licensed Northbrook private investigators. Our investigators are committed to providing affordable, reliable service in your area and reporting their results in a timely, accountable manner. Contact us today to begin your case.


Local Northbrook Private Investigation Services

ICS provides a full range of investigations services for the City of Northbrook and all surrounding metropolitan areas. Simply submit a free online private investigation consultation form.

A private investigator in Northbrook must apply to the Illinois Department of Public Safety and pass licensing requirements, including a thorough background check. While many private investigators come from a law enforcement or military background, it is not a requirement for employment as a private investigator in Illinois.

You can rest assured that any Northbrook Private Investigator assigned to your case with ICS are fully licensed and insured in accordance with Northbrook laws and participates in any required continuing education.

Northbrook Private Investigator

With its population of nearly 13 million people, the State of Illinois is on par with the national medians in terms of crime rates.  In 2011, 401,272 index crimes were reported, which include both violent and property crimes.  Of the 31.18 crimes per 1,000 residents that averages, 4.29 were violent and 26.89 were property crimes, compared to 3.9 and 29.1 nationally.  The city of Northbrook lays claim to over 33,000 of those residents, and it is rated safer than 65% of U.S. cities, with only 0.36 violent and 13.99 property crimes reported per 1,000 residents.  Despite the relative safety, there is never enough manpower or resources for the government law enforcement agencies to investigate every case.  If you want to guarantee that sufficient time and energy are being dedicated to your case, you should hire a private investigator through ICS.

How to become a Private Investigator in Northbrook

  1. Be at least 21 years of age
  2. Have no felony convictions within the last 10 years
  3. Is of good moral character and of mental competence, does not suffer from substance addiction
  4. Has a minimum of three (3) years experience within the past five (5) years working full-time for a licensed private detective agency, a licensed attorney, or in a law enforcement agency
  5. Pass a written examination

Northbrook Private Investigator Restrictions

In order to conduct private investigations in Northbrook, all private investigators must comply with local and federal laws.

  • Impersonate Law Enforcement - Private Investigators in Northbrook cannot carry a badge, wear a uniform or say anything that might imply that the private investigator is a police officer or federal agent.
  • Make an Arrest - Private Investigators in Northbrook cannot legally make an arrest. If there is evidence that suggests an arrest should be made the investigator should contact law enforcement.
  • Wiretapping - Wiretapping is illegal without a proper warrant. Private Investigators cannot tap a phone.
  • Trespassing - Private Investigators cannot break and enter onto private property.

Northbrook Cheating Spouse Investigation

Cheating Spouse Investigations can help you separate fact from suspicion if your beginning to believe your spouse may be cheating on you. There can be many reasons as to why you began to suspect your spouse of cheating but you should not react irrationally without knowing all the facts. ICS has been helping people in Northbrook with cheating spouse investigations since 1967 and we can help you too. Call us today to learn more about Cheating Spouse Investigations and see how one of our private investigators can help you.

Northbrook Background Investigation

Do you need a background investigation in Northbrook? Are you located in Northbrook but need a background investigation elsewhere? ICS has been conducting background investigations since 1967 and we can help you conduct a background investigation in Northbrook or anywhere else you may need an investigation conducted. Background investigations can be very informative but are sometimes only a part of a much larger and more in depth investigation. To learn more about what kind of information we can acquire with a background investigation call us today and speak with an ICS Private Investigator.

Northbrook Missing Persons

Are you trying to find someone who went missing in Northbrook? Are you in Northbrook but need help searching for a missing person elsewhere? ICS understands the difficulties associated with missing persons cases. You should always go to the police first about a missing person but they don't always have the time, or resources to dedicate towards a missing persons case. Learn more about ICS and missing persons investigations in Northbrook by calling and speaking with a private investigator and see how we can help you find your loved one.



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