NEWARK, N.J. — A New York man and a New Jersey woman are accused of roles in a conspiracy to distribute dangerous designer drugs, including a synthetic opioid that authorities say is several times more potent than morphine.

Federal prosecutors say 34-year-old Brian Parker, of Long Island City, New York, and 29-year-old Victoria Koleski, of Farmingdale, New Jersey, conspired to distribute the drugs. Both were arrested Tuesday and were due to make their initial court appearances later in the day.

Parker allegedly made and distributed the drugs through two online companies he controlled. The substances he allegedly sold were linked to a May 2016 overdose death in Madison, Wisconsin.

Authorities say Koleski was among those who helped Parker distribute the drugs.

It wasn’t known Tuesday if Parker or Koleski have retained attorneys.

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