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Corinthian Group

Top Pro

Case type
Services needed

Responds in about 3 hours


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About
PLEASE NOTE: All surveillance investigations require a 4 hour onsite minimum commitment from the prospective client plus the costs of our investigator(s) drive time and mileage. Our maximum hourly rate starts at $125.00 per hour, $1.00 per mile for each investigator and can be reduced depending on your needs. (e.g., total amount of hours, total day(s), number of investigators needed.) In order to obtain a quote for a surveillance investigation of any type, please provide us with the specific day(s)/date(s), the specific hours of surveillance (e.g., Sunday, February 14th 2027 from 7am-7pm) and the address or city will the surveillance will begin. With over 30 years of experience, 25 years as a California licensed private investigator, Corinthian Group has a diverse areas of service for which we specialize. From workers’ compensation, disability insurance fraud and family law cases such as elder abuse, child custody and infidelity cases. Corinthian Group offers: ​ BNPL/BUY NOW PAY LATER Options through PayPal, same day electronic updates, real time target/claimant/subject identification and paperless claims management, Eavesdrop Detection/Debugging/TSCM service for both home and vehicle, much more. Corinthian Group strives to maintain the latest technological advancements in order to maximize our clients required results. We are continually developing new strategic uses of technology to better serve our clientele. We are a full serve Private Investigative firm with an emphasis and dedication to serving the needs of the Insurance, Corporate and Legal industries. Whether conducting hostile witness locates, going undercover to infiltrate a theft ring and or obtaining mitigating surveillance video, we provide the timely, relevant and actionable intelligence needed to prepare your cases so you can make informative decisions. Through our affiliate private investigator network, Corinthian Group has integral resources throughout the world. This allows us to handle major assignments, while still providing the personal attention and integrity necessary for the more intimate assignments. PRIVATE INVESTIGATIONS: Surveillance Insurance Fraud Investigation Child Custody & Child Support Investigation Infidelity Investigation Elder abuse Cohabitation Cases Retail Loss Prevention Investigation Aerial Surveillance Investigation Real Estate Investigations Unmanned/Remote Surveillance Multi-Operative Surveillance Assignments Drone Surveillance From inception, Corinthian Group sought to be a technology savvy private investigative firm. Corinthian Group wanted to leverage technology so that the entire investigative process was efficient, which improved the work product that was then easily witnessed by claims professionals, attorneys and corporate clientele, alike. Every aspect of Corinthian Group's daily operation revolves around utilizing state of the art technology, expertise and integrity in providing our clients with efficient results they desire. STATE & FEDERAL LICENSES: CA PI# 26978 FAA 107 License # 4374346
Overview

Current Top Pro

Hired 60 times

Serves Riverside, CA

Background checked

7 employees

24 years in business

Business hours

This pro hasn't listed their business hours.

Payment methods

This pro accepts payments via Cash, Check, Credit card, PayPal, Square cash app, Stripe, Venmo, and Zelle.

Social media

Facebook, Instagram, Twitter

Top Pro status

Top Pros are among the highest-rated, most popular professionals on Thumbtack.

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2025

Top Pro Icon

2024

Services offered
Services needed
Case type

Adultery / Cheating

Child custody

Theft / crime / fraud investigation

Work location

My customers travel to me

I travel to my customers

Projects and media
Projects and media
Reviews

Customers rated this pro highly for responsiveness, professionalism, and work quality.

Exceptional 5.0

17 reviews

5

100%

4

0%

3

0%

2

0%

1

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Your trust means everything to us. Learn about our review guidelines.

Read reviews that mention:


pro avatar
Sharon N.

2 weeks ago

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Hired on Thumbtack

High quality, discreet and professional work from the team. Highly recommend for all your needs. My matter was handled with care and precision and I can't say enough good things given the gravity of the issues at hand. If you're looking for a team that is on it from the first consultation, I highly recommend them.
Private Investigation
pro avatar
Howard W.

3 weeks ago

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Hired on Thumbtack

Hi Claude,
I wanted to take a moment to thank you for the phone consultation. Speaking with you gave me real peace of mind and reassured me that everything is going to be okay.
I truly appreciate your encouragement to pursue my dreams, live my life, and prioritize a high quality of life. Your advice and support mean a lot to me
Corinthian Group's reply
Thank you very much Howard! You're blessed!!! No amount of harassment will take away your peace. True peace is that God given "peace which surpasses All understanding." If you don't mind, it doesn't matter... Glad we had an opportunity to speak over the phone. Effective 1 on 1 conversations make all the difference in the world. Good luck. Thanks again for your thoughtful and very encouraging words!
Private Investigation
pro avatar
Toi H.

Aug 30, 2026

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Hired on Thumbtack

Thank you for the high level of professionalism and all of your hard work, you gained my trust and confidence… I would definitely use your services in the future and let friends and family know that your company is highly recommended.

Warmest Regards,

Toi Harvey
Corinthian Group's reply
Wow! That is a FANTASTIC review Toi! Thank you very much! Looking forward to working with you in the future. Call or text me anytime you have questions or concerns. Have a blessed evening!
Private Investigation
pro avatar
Susan O.

Aug 18, 2025

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Hired on Thumbtack

I am deeply grateful for my conversation with Claud. His insight was both direct and compassionate, and it gave me the clarity I desperately needed. What stood out most was his empathy—he didn’t try to push unnecessary services, but instead spoke truthfully about my situation.

Because of his candidness, I was able to confront the reality on my own. While painful, this revelation confirmed everything Claud had warned me about.

If you’re looking for someone honest, empathetic, and straightforward, I can’t recommend Claud enough. He truly has a gift for guiding people through difficult times. God bless him. 🙏🏾
Corinthian Group's reply
I'm honored to be of service! Thank you for taking time out of your day to share your thoughts publicly. May the Lord continue to guide, protect and bless you and your family. Warm regards, Claude
Private Investigation
pro avatar
Shannon G.

Nov 18, 2023

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Hired on Thumbtack

I highly recommend Claude and his team! He is very knowledgeable and excellent at his craft. I am located in Illinois, so trusting a professional in California was very important when it came to my soon to be ex-husband’s “business trip.” Something didn’t feel right about this trip. I listened to my instincts and hired Claude and his team. I told myself that it was peace of mind whatever the outcome. I am thankful I went with my instincts because it (sadly) confirmed my suspicions. Claude was sincere and calming when he had to break the news. That cannot be very easy for someone to do, but he was very empathetic to the situation. During the investigation, he was very responsive and thorough. Within just a few days, he had the final report finished and ready to send to my lawyer. It is a horrible feeling when you catch your spouse cheating, but I had that lingering suspicion for a while and I am happy that I listened to my gut. I couldn’t have asked for a more knowledgeable, kind, professional and true gentleman to have gone with me through that difficult time. I am grateful for all the team’s hard work.
Corinthian Group's reply
I am speechless. Because the nature of my profession and to whom we provide services, it's typically not in my client's best interest to give public, online reviews & recommendations which confirm they've had to hire a private investigator. For certain clients, there's a stigma associated with hiring a private investigator and publicly acknowledging they've needed help in either their personal and or professional lives is a courageous step in and of itself. Corinthian Group strives to keep our client list and case details confidential for the sake of their reputations. Nonetheless, I'm extremely surprised and very thankful that you've taken the time to write such an amazing review. You're a pleasure to work with and most likely the best client experience I've had in over 25 years in business!
Private Investigation
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Claude Ammons

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