We are uniquely qualified to perform investigative tasks you need in a timely manner. Our investigators and detectives are of the highest standards and have a vast range of investigative tools, resources, and specialized experience. Our mission is to bring greater value to our clients by continuing innovation, embracing new technologies and providing services that are designed to establish high standards of ethics and outstanding results.

We provide a product and service to our clients using licensed and insured professionals. Our Detective in Charge, Robert L. Kieffer, LPD, has over 23 years of Investigative experience. We pride ourselves in devoting our full resources to each and every client. We work closely with our clients to formulate investigations that they desire and need in a world of risk. We are sensitive to the clients budget requirements and that they are balanced with the type of investigation needed. The cost to conduct Private Investigations vary and are determined by the length, depth and type of investigation needed. Our policy is to discuss the most cost-effective options available and then provide an estimate that carries no hidden costs.

Highlights, Specialties & Features

  • Civil, criminal, infidelity, locates, child custody, and background investigations

Professional Associations & Certifications

  • Lake County Bar Association

Serviced Areas

  • Northern Illinois

Payment Options

  • American Express, Debit Cards, Discover, MasterCard, Money Orders, Personal Checks, Travelers Checks, VISA, Zelle

Contact Details

  Website
  Person Robert L. Kieffer, LPD
  City Waukegan , IL
  Zip Code 60079
  Address 1519 N. Lewis Ave
  Phone Number (847) 526-7727
  Mobile 561-262-8020

Business Representative

Robert L. Kieffer, LPD

Licensee in Charge

I have been a private detective since 1996 with a background as a deputy with the McHenry County Sheriffs' Dept.

Products & Services

Civil Investigations

We have conducted civil investigations for businesses, villages, attorneys and private individuals. Our goal is and always will be to bring an investigation to a successful conclusion, no matter what the scope of the investigation may be. We offer a wide variety of civil investigations and have the ability to customize an investigation to suit your needs.


Criminal Investigations

We can assist the Police Department or an attorney with your criminal investigation and protect your interests. We will ensure that all investigative measures are initiated and all investigative avenues are explored. If you are the subject of a police investigation, we can provide you with information to assist in your defense. Our chief investigators have over 23 years of investigative experience. Clients have expressed concern that once a police agency had reached a decision not to proceed with an investigation, that was that.


Infidelity/Cheater Investigations

We understand that hiring a private investigator may be the hardest decision you may ever make. and should not be taken lightly. We understand that domestic investigations can be emotionally distressing and we guarantee a discreet and confidential investigation. We conduct surveillance of spousal or teen activity, conduct background investigations of domestic employees and investigate cases of suspected elder abuse. In elder abuse investigations, we consult with medical doctors who assist in analyzing all data recovered. In all of our investigations, we use the latest investigative technology and provide a comprehensive report that allows you to make informed decisions.

Customer Testimonials

This firm is fast and does outstanding work! Our law firm has been working with them for some time now, and we find that their results are excellent.


Very satisfied with the service. Maintained professionalism, good communication and follow up, consistent and quite flexible with request(s) from client. I highly recommend R7 Inc.