Founded in 1985 by Retired Maine Game Warden Charles A, Merrills, Merrill's Investigation and Security has spent the past 29-years building our reputaion as the best, most reliable, and easiest to work with investigation firm in the industry.

In 1999 the company added security and executive protection  to its suite of services.

In 2004, after a ten year affiliation with Merrill’s and 21 years in law enforcement, Michael C. Harrington Sr. acquired the company. Under Mr. Harrington’s leadership the company has grown exponentially and has developed into a regional powerhouse. 

Mr. Harrington has served as:
President of Maine Licensed Private Investigators Association(MLPIA)
President of Professional Licensed Investigators of Maine (PLIM)
Chairman of Maine Board of Licensure of Professional Investigators

Today, Merrill's is one of the largest providers of investigative and security services.

With a combined experience of more than 1,000 years, Merrill’s leads the industry in experience, expertise and professionalism. Merrill’s resource depth makes it able to provide clients with one-stop shopping for investigative services across the northeast – something no other firm can match.

At Merrill’s the primary mission is to provide clients with timley, cost-effective, discreet, and professional investigations.  In every case Merrill's provides accurate and professional written reports that describe events as they happened and, where possible, include videotaped, photographic and/or other recorded documentation.
All Merrill’s investigators are intimately familiar with the geography and culture of the region. Most have worked in many areas of the state during their careers in law enforcement and private investigation. Merrill’s has developed many contacts who serve as invaluable resources in gathering information to expedite client investigations.
Our Promise: We have a simple promise to all of our clients; we stand behind our results.

What People Are Saying

""Many investigative services have a 'one size fits all' approach, whereas Merrill's tailors its services to the type of case we have."" - Law Client

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