About Us

We at S.I.A. pride ourselves on our meticulous and thorough approach to an investigation. Our persistence and tenacity are qualities every successful investigator must possess and the main reason our investigators consistently secure video over 75% of the time. From the moment we receive a case until our report is submitted to client we adhere to one simple rule, "Leave no question unanswered". With this in mind, our clients can rest assured that they are receiving a superior product. We seek out the information and activity our clients are interested in knowing.

S.I.A. will provide you with prompt, professional and reliable service. Donald Scott, owner of Stealth Investigative Agency, is a licensed private investigator in four Midwestern States and has been in business for 13 years with over 25 years of experience, primarily in the workers comp surveillance field. We are licensed in Illinois, Indiana, Michigan, and Wisconsin and handle the St. Louis, Missouri area. We have a diversified staff of investigators that enables us to assimilate into any neighborhood or area.

We are confident that you will be satisfied with our attention to detail, persistence and overall quality of our reports & video. We are centrally located in Downers Grove, IL and are very familiar with the greater Chicago Metro area. We guarantee you that when you call and need to speak to the owner he will be available.

Stealth Briefs

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  • Green Thumb

  • Muscle Head

  • Country Roads

  • Drinks Anyone?

  • Revved Up

  • Monster Trucker

  • Young Love

  • Happy Feet

  • Cheating Wife

  • Weekend Hack

  • Reely Healthy

  • Weekend Warrior

Investigation Services

We hope that if you or any of your clients ever require any of these services that you will keep Stealth Investigative Agency in mind. Please feel free to contact myself anytime. We look forward to doing business with you.


Insurance Claims

Our knowledgeable staff can effectively and swiftly work with SIU, claim adjusters and attorneys to efficiently handle a file from initial request through a trial. We are well aware of what it takes to work claims for Insurance Companies and TPA’s. The vast majority of our experience comes from handling nearly 3000 Workers Compensation, Disability & Liability files over the last 25 years.

Interviews & Statements

Our investigators have a combined experience of 25 years and have conducted numerous taped witness interviews and statements. We work closely with attorneys and adjusters in formulating witness questions and are adept at follow up questions designed to answer all our clients questions and concerns.

Domestic & Infidelity

Has the spark gone in your relationship and you don’t know why? Perhaps your spouse is spending an inordinate amount of time on Social Media or away from home? Contact SIA and we will discreetly advise on how to proceed. We can utilize GPS to monitor spouses movement or have one of our surveillance specialist follow and videotape any discreet rendezvous.

Background & Social Media Check

Due to our litigious society it is imperative that when a business owner makes that all important hire, they do so only after their due diligence in order to avoid future litigation. Our unique industry enables SIA to access Databases the general public cannot. In addition, we can locate missing persons and investigate proposed business partners.  As with background checks, Social Media searches offer a plethora of information when trying to locate an individual or merely checking their current or past activities.

Accident Investigation

Our investigators are experienced at scene investigations, whether a vehicular or personal accident investigation we will secure all evidence, i.e. photos/video and statements in order to present a clear concise picture of what happened, thus providing our clients with the information needed to build a solid case in any litigation proceeding.

Audio/Video Sweeping

Do you feel you are being watched or listened to? Is someone tracing your steps or know where you have been? The Protect 1207i is a reliable tool for tracing different digital transmissions such as GSM, Bluetooth and other wireless transmissions (Cellphones and GPS transmissions). The sensitivity of a common RF detector (bug detector) is spread along a wide frequency range, usually 3, or even 6-7 GHz. This means the common detector cannot detect such weak and non-continuous signals as Bluetooth, Wi-Fi or Wi-Max. Let us help ease your mind and locate any such devices in your home, vehicle or office.

Process Service

We currently work with numerous law firms that rely on our dependable & timely Process Service. We pride ourselves on a 95% delivery rate success. When a situation arises that a respondent is not residing at a provided address we are typically successful at locating him utilizing our skip trace search. Why let the Sheriff’s office handle your all-important Process Service? We can provide you fast 48 hour turnaround on your service.

Student Residency

With today’s sky-rocketing cost of education combined with state budget restraints it is imperative that each cent is being utilized for the deserving students of a district. Let our experienced investigator’s conduct an in- depth investigation/surveillance to determine the authenticity of a student’s address so that school administrators can make an informed decision.

S.I.A. Blog

Stealth Investigative Agency is constantly researching new ways to provide better, more effective services. Please check out our blog for ongoing information relating to the industry.

Empowering Life Decisions Appe


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All The Signs Your Spouse Is C

You’ve suspected for days, maybe weeks. Something is wrong or off between you and your spouse, and you’re

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4 Reasons to conduct backgroun

Share on Facebook Share on LinkedIn Tweet about this on Twitter Share on Google+ Email this to someone Hirin

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Student Residency Fraud

On a chilly spring morning, Zainab Al-Shammary sits in the passenger seat of her car — almost a football fiel

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CaseSwap Submittal

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Submit a Request

Due to the wide variety of clients and services, we do not list our pricing. Please contact us for free, individual consultations.


Find Us

Address: P.O. Box 725
Downers Grove, IL 60515

Phone: 630-810-8909

Email: dscott@sia-investigations.com

Claimant/Subject Information
First Name
Last Name
Date of Birth
Claim/File #
Date of Loss
Describe Injury
Misc. Info
Client Information
Company Name
Requester (First Name)
Requester (Last Name)

Centrally located within the Chicago Metropolitan Area