Welcome to Hertog & Associates, Inc.

H.A.I. is an award-winning private detective agency serving businesses and individual clients from our office located in the northwest suburbs of Chicago. If you are interested in learning what our clients think of us or reading articles on us, please review the client testimonials or articles in the news. Thank you for considering H.A.I. to handle your confidential matter.

To my clients, thank you for being my customer.

With regards,
Dave Hertog

More About Us

Do you need to locate someone? Are you a law firm looking for a missing or unknown heir? Maybe we can help you reconnect with a family member? Are you adopted and curious about who your birth parents are? We can help you discreetly, promptly, and within a budget!

Email our office to schedule a consultation.