The indictment by special counsel Robert S. Mueller III of 13 Russians associated with a St. Petersburg online “troll factory” that allegedly interfered with the U.S. election has brought a sense of vindication to the handful of former employees who have already been speaking out about what they witnessed.

One of them, 43-year-old Marat Mindiyarov, a teacher by training, spoke by phone with The Washington Post on Saturday from the village outside St. Petersburg where he lives. Mindiyarov worked in a department for Russian domestic consumption. When he took a test in December 2014 to move to the factory’s “Facebook department” targeting the U.S. market, Mindiyarov recalled, he was asked to write an essay about Hillary Clinton. Here are lightly edited excerpts of the conversation.

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