Jeremy Duguay, 34, of Bangor, pleaded guilty March 27 in U.S. District Court to conspiring to manufacture, distribute, and possess with intent to distribute, marijuana.

According to court records, during a period between October 2010 and August 2016, Duguay conspired with others to illegally manufacture and distribute marijuana. They grew marijuana at a large, sophisticated indoor growing facility in Frankfort, according to the U.S. Attorney. In May 2016, law enforcement officers executed a federal search warrant at the facility and recovered about 400 marijuana plants, 295 marijuana root balls, and paraphernalia used to manufacture and process marijuana.

According to the search warrant affidavit, he and his co-conspirators were not registered as medical marijuana caregivers with the Maine Department of Health and Human Services and the location of the facility was not reported to DHHS.

Duguay faces up to 20 years in prison, between three years and life of supervised release, and a $1 million fine. He will be sentenced after the completion of a pre-sentence investigation report by the U.S. Probation Office.

He is the third man to plead guilty to the charges. James Mansfield, 33, of Etna, pleaded guilty Feb. 15; and Nicholas Reynolds, 33, of Bangor, pleaded guilty Jan. 29.

The investigation was conducted by the U.S. Drug Enforcement Administration.