North American Investigations

North American Investigations is Long Island's leading industry expert in the private investigation field. Our firm offers an array of services, including surveillance, matrimonial/infidelity, criminal, missing person investigations, and background checks. We understand what our clients are looking for and know how to deliver the best results possible. NAI is here to bring you peace of mind. Observation and obtaining evidence is critical in our field, and all clients receive a report of our findings that is suitable for court along with video or photo documentation. Our video and photo evidence is time and date stamped, allowing you to know that you are being delivered accurate results by professionals. This supports and corroborates the investigator's observations, which can be utilized in the court of law for any legal situation. We are able to provide court testimony and have expert witnesses available as needed. Our Long Island private investigators provide an array of services.

Established in 1972. Established initially in 1972, NAI changed its name from EHS Investigations to NAI (North American Investigations) in 1992. NAI was started by Darrin Giglio, both the CEO and Chief Investigator. Our mission is to make sure our clients walk away with both peace of mind and the facts they deserve. NAI goes above and beyond to help assist their clients with their case, tailoring each investigation for your personal needs.