Thank you for visiting STO Investigations, Inc. official website.  Since 1998, we have been serving numerous Illinois businesses and attorneys with process service, legal investigations, uniformed security and retail loss prevention services.  It has always been our goal to provide each customer with customized, individual detective and security services.  We are currently updating our website so check back often to see our changes.  Please feel free to contact us for a no obligation, free quote.  We are confident that we will provide you with the service you expect.

Illinois Statewide Process Service and Detective Services 866-426-3960

Professionally Licensed:

Illinois Licensed Investigations Agency: 117-001011