We are private investigators with headquarters in Denver, Colorado and a satellite office in North Carolina. We are experienced, prompt, professional, and affordable.

Once you have etrusted McGill Investigation Agency with your valued business, you will continue to reap the rewards from our diligent team of investigators.


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McGill Investigation Agency is a full service investigation agency that strives to go an extra mile on every case we work – even if this requires staying longer than requested, and utilizing our own time in order to achieve the results the client expects and deserves.

We achieve results and set our firm apart from other companies by sticking to the highest standards of education, training, and integrity.

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McGill Investigation Agency
Denver, Colorado 80010

P.O. Box 10859
Wilmington, North Carolina 28404

PHONE: 303-908-8292 Colorado
910-232-8114 North Carolina

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