Four men, including two from Harmony and one from Dexter, pleaded guilty Wednesday in U.S. District Court in Bangor in a drug conspiracy case in the Dexter area investigated by the U.S. Drug Enforcement Administration and the state Drug Enforcement Agency.

The Dexter Police Department and the Penobscot and Piscataquis County sheriff’s offices also assisted in the case.

Mark Tasker, 49, of Dexter; Greg Tasker, 28, of Stetson; and Eugene Moulton, 57, and Antoinette Perreault, 48, both of Harmony, pleaded guilty on charges of conspiring to distribute oxycodone and cocaine, as well as possession of the two drugs with the intent to distribute.

Court records show that the four distributed oxycodone and at least 11 pounds of cocaine in the Dexter area between January 2002 and November 2014, according to a news release from U.S. Attorney Thomas E. Delahanty II. The drugs were acquired in Rhode Island before coming into Maine.

Mark and Greg Tasker, a father and son, according to the news release, were found to have distributed both drugs. Mark Tasker also pleaded guilty to maintaining a drug-involved premises, as he let his residence on Liberty Street in Dexter be used to distribute the drugs.

Moulton and Perreault were found to have distributed cocaine.

The release did not say whether a sentencing date had been scheduled.

Mark Tasker faces 10 years to life in prison, five years to life on supervised release and a $10 million fine on the conspiracy charge. On the premises charge, he faces up to 20 years in prison, three years of supervised release and a $500,000 fine.

Greg Tasker, Moulton and Perreault all face up to 20 years in prison, from three years to life on supervised release and a $1 million fine.

On Jan. 25, four co-defendants also pleaded guilty in the case. John Williams, 43, of Stetson; Cynthia Williams, 42, of Stetson; Whitney Chadbourne, 22, of Harmony; and Corey Pomerleau, 24, of Harmony, await sentencing.

The eight were among 10 arrested in April 2015 in connection with the conspiracy, and prosecutors asked they be held without bail.

Madeline St. Amour — 861-9239

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Twitter: @madelinestamour