1. Allen Investigations

    1. Allen Investigations

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    Costa Mesa, CA

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    Allen Investigations

    4.5 (16 reviews)
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    Review Highlights - Allen Investigations

    I spoke to one of my half-sisters for the first time today (3 days after hiring Debra).

    Mentioned in 15 reviews

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    Peterson Investigations - Helping out the tv show Fatal Attraction with some investigative analysis.

    Peterson Investigations

    (149 reviews)

    Five Stars Isn't Enough for Eric Peterson! I would give him 100 stars if I could!…read more If you need a process server or private investigator who actually gets the job done, look no further than Eric Peterson. To put it into perspective: my attorney had previously hired a process server who spent an entire month trying--and failing--to locate and serve the defendant in my case. After four frustrating weeks of zero progress, Eric stepped in. He had the defendant located and served in less than 24 hours. This wasn't an easy task, either. The service was at a highly secure and challenging location--one that seemed impossible for others, but proved to be no challenge at all for Eric. The level of efficiency, speed, and sheer professionalism he brings to the table is unmatched. Beyond his incredible skills and hustle, Eric is just a genuinely great person to work with--communicative, trustworthy, and deeply dedicated. He took a high-stress situation and completely turned it around overnight. I cannot recommend Eric Peterson highly enough. If you want results instead of excuses, he is your guy! I will be sure to use him if ever needed down the road.

    I've worked with this Peterson Investigations quite often in a professional capacity, so I was…read morealready familiar with their level of efficiency and reliability. Recently, I had to use their services for personal reasons, and they delivered the same high standard of service I've come to expect. They were extremely responsive, communicative, and handled my request with a strong sense of urgency. Serving legal documents can be time-sensitive and stressful, but they made the process smooth and straightforward from start to finish. It's reassuring to know that whether you're working alongside them professionally or relying on them personally, they consistently show professionalism, attention to detail, and dependability. I wouldn't hesitate to recommend them.

    Armando Zatarain Investigations - Armando Zatarain California Private Investigator

    Armando Zatarain Investigations

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    Armando is a class act and did everything he said he was going to do and more. Going above and…read morebeyond is an understatement...I don't think he sleeps. He made himself available at all hours of the day, seven days a week. He even went and visited my daughter who was incarcerated every weekend and Xmas eve because she was not allowed live visitation. Not because he had to but because he thought it was the right thing to do. The case I retained Armando to investigate was a very serious and complex case in many faucets. Armando was always available, patient and kind throughout the entire process. I recommend Armando and his team to anyone looking for a PI who is responsive and not afraid to go above and beyond. Armando, thank you for everything you have done to help my daughter through this difficult time in her life. Our family is very grateful to have met you...you make a difference in the lives of others and we appreciate you!

    I called and Armando answered the phone himself immediately. I explained the situation I was having…read moreand he asked good questions and provided some good examples of prior work on similar cases. I hired him immediately on the phone for a preliminary investigation and he provided a clear price that I thought was reasonable. His investigator Amy did the work within 24 hours (over the weekend no less). Extremely thorough and exactly what was promised. Answered my followup questions over email. I hope you don't need ever get yourself in a situation like mine where you need his services, but if you do I believe he'll do an excellent work--on time and at a fair price.

    Adoption Reunions - Debra Allen, Private Investigator - Looking for your child that was adopted?  Adopted and want to find your birth family?  Contact me. 949-612-5714

    Adoption Reunions - Debra Allen, Private Investigator

    (11 reviews)

    Debra was the perfect choice for helping me seek out a family member I was looking for. She was…read moretimely, professional, and kind. I was in the position where I knew finding this person wouldn't necessarily be difficult, but I wanted to give them a chance to deny contact if that was what they wanted. Debra was the perfect intermediary and I enjoyed working with her. I don't know many people also searching for family members... But I would recommend Debra immediately!

    Out of all the scenarios I ran through my head of how this emotionally complex process would go, I…read morenever expected it to go so smoothly. Debra Allen and her investigative team far far surpassed my expectations. From the very beginning, Debra was immediately responsive. Tamara was the investigator assigned to us. She is absolutely incredible! We received information on my dad's entire biological family within days. What other P.I.s told us could take months and might not result in much information, Tamara made happen in what seemed like the snap of a finger (even though I'm sure hours of hard work went into it). These people are soo much more than investigators; they understand the complexity of adoptions and are committed to helping. Tamara answered all of our questions and shared her expertise in the most helpful way. She was always immediately responsive and guided us as far as we wanted things to go without ever making things overwhelming for us or making the family we had found feel overwhelmed. I could not have asked for more out of this process. This team knows what they are doing and what they offer is truly priceless! I wholeheartedly recommend them.

    Martin Investigative Services

    Martin Investigative Services

    (15 reviews)

    We chose Tom after seeing all the certifications and awards on his website -- that sealed the deal…read more He helped us perform a skip trace for a missing person and delivered nothing less than top-level service. Transparent, quick, and professional from start to finish. Highest quality, no question.

    I truly cannot thank Tom Martin from Martin Investigative Services enough! I have been searching…read morefor over ten YEARS for my biological paternal grandfather and kept coming up short because A.) he was a drifter before the age of social media and B.) both my father and grandmother had passed and took all knowledge of his existence with them to the grave. I had no knowledge of his real name, birth date, address, etcetera. I finally had enough and scheduled a meeting with Tom Martin. I told him how desperate I was to find my grandfather and gave him what very little information I had. Martin Investigative Services found my grandfather within HOURS of our meeting. It turns out my grandfather also lives in California and I was able to meet him two days later. Not only did he have my grandfather's address, but he had spoken with his sister and his mother. It turns out I had a great-grandmother and great-aunt that were excited to speak to me! The resemblance between him, my father and myself is uncanny. If not for Tom and his team, I would never had been able to fill the hole in my heart and finally solve the mystery my father was never able to in life. They provided my with family I never knew I had and I've finally (!) been able to fill my family tree. Thank you, thank you, thank you M.I.S.!

    Allen Investigations - privateinvestigation - Updated September 2026

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