Illinois Private Eye Investigative Services & Private Process Service

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Illinois Private Eye Investigations & Process Service

A full-service, private Illinois Investigative firm, Foster Investigations, Ltd. is owned and operated by Mark Foster — an Illinois Licensed Private Detective.

Mark Foster handles each case personally and specializes in tailoring his professional investigative services to meet your law firm, business, bank, insurance company or personal investigation and process service needs.

Why Choose Foster Investigations?

  • Experience.  Hundreds of criminal defense cases; Thousands of Process Services
  • Expertise.  Locating Hard-to-Find witnesses/defendants in Illinois and throughout the United States.
  • Specialty.  Video evidence & tailored service
  • Location.  Bloomington IL, close to a Major Insurance Company's HQ — can easily serve papers on RUSH basis.

Is Your Personal or Business Reputation On the Line? 

Improve your Chances of Winning in Court.  Call Foster Investigations immediately if your personal or business reputation is on the line. A professional private investigator can improve your chances of prevailing in civil or criminal court by providing evidence supporting your case. We can work with your attorney to provide support in legal proceedings or provide discrete services for your personal or businesses needs.

Investigative Services Process Services


Illinois Private EyeFree Phone Consultation

Every case is different.  You’ll get a customized investigation to meet your needs.  For professional service and a free initial phone consultation or to schedule an investigation or process service, contact Mark Foster today

Private Investigative Services Peoria IL


Illinois Private Detective

  • Illinois License #115-001201


Service Area


* main concentration



Nights & Weekends

Contact Mark any time — nights and weekends.