"Don and Kristin Nason have done outstanding work for me on a number of criminal and family cases.  They are  diligent in tracking down leads, conducting thorough witness interviews, and obtaining hard to find records. They are prompt to answer questions and submit reports.  They are also more than fair with their fees and my clients trust them immediately.  On one particular case that comes to mind their work singlehandedly turned the entire case around.  My client was facing serious felony charges and they were able to uncover a treasure trove of information about the complaining witness showing that she was a liar, which led to a very favorable result.  I can't recommend them highly enough."

Andrew Winters, Esq.

Concord, NH

"We have used The Nason Group for several years now and have always been pleased with their professionalism and dedication with every case!"

Attorney Michael Anderson

Concord, NH

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Your New Hampshire Resource

Providing Professional Investigative Services Since 2005


75 S. MAIN ST., #7-302


(603) 748-1660

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SERVICE & integrity


The Nason Group has over 36 years of experience as surveillance experts, private investigators, court researchers, litigation support providers, process servers and experienced security and law enforcement professionals. This enables us to handle any case or situation, large or small. 

Our network of investigators and specialists around the world readily assist

us wherever a case may lead. Location and lack of expertise are not limitations for us. We can reach out to associates in other states and countries at a moment's notice. Trust us for your Private Investigator, Security and Process Server needs.

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At The Nason Group, we don't treat you like a number. You've called us because you have a challenge or problem, and our job is to help you resolve it. We pride ourselves in personal service and completion of the task at hand--whether it is providing low profile protection, locating a witness, serving a subpoena, surveilling a cheating spouse, performing background checks, or video documenting a worker's compensation fraud. We are here to solve your problems--never giving up because it might be too difficult. 

Your satisfaction makes you a repeat client and great referral. We pride ourselves in being the right company to conduct your work the way you want it done! 

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