My best friend needed a private investigator in her divorce case. She had been divorced for 5 years and paying spousal support all the while her ex was living with his gf. Her atty needed proof that her ex was "co-habiting" as they call it ... lol. Anyhow, We hired John DeMarr and the job was done quickly, efficiently, and the proof was sufficient for the court to reduce her support payments in half. Highly recommend John DeMarr PI to anyone who needs answers in a sensitive situation. I hope I never need you , but if I do I won't hesitate to call you!

I used the services of California based John DeMarr P.I. when I had a suspicion that my fiance was cheating on me. By using high-tech tools and latest techniques they delivered me with crisp information which helped me in settling all my doubts easily.Thank you!

The business background check services of John DeMarr P.I., California are truly remarkable. They helped me to easily obtain all the information about a company that I was supposed to enter an important deal with. Great services!

I would definitely recommend John DeMarr P.I. for their expert marital surveillance services. The team has successfully surpassed my expectations and I am highly impressed. 10/10!

I am highly satisfied with the dependable nanny background services of John DeMarr P.I. The team was very knowledgeable and proceeded with the case in a very professional manner. Highly recommended!

Just a great experience. John DeMarr was very clear, up front and honest. I needed surveillance and John DeMarr Private Investigations came through for me. John got me the result I needed in a timely matter and I was pleased with the results. Very professional, honest, helpful, and reasonable rate. I must say, John DeMarr is the real deal when it comes to private investigations. Private investigation can be tricky and complex. I thank John for making the dreaded process easy and fast. Trust only the experts and those people with integrity. I recommend John DeMarr to everyone. Thank you, John!

The dependable investigative services by John DeMarr P.I. greatly helped me in getting complete information about the company I was planning to do business with. The team is highly efficient at work and very prompt!

I am highly impressed by the work of professional detectives associated with John DeMarr P.I. They are highly knowledgeable about the latest gadgets to record proof and deliver the work well in time. Recommended!

The professional and expert services of John DeMarr P.I. have greatly helped me in clearing all my doubts regarding my spouse that was becoming a trouble in our happy married life. Thank you team for all your quality work in such a restricted timeline.