Authorities accused Kian and Alptekin of illegally lobbying to discredit Gulen and have him extradited. According to the indictment, Alptekin worked at the direction of the Turkish government, but the defendants worked to conceal that fact.
The charges, which were filed under seal last week, appear to shed light on the cooperation of Flynn, who last year admitted to lying about several aspects of the lobbying work. He pleaded guilty in 2017 to lying to investigators with special counsel Robert Mueller’s team and agreed to cooperate with investigators.
Prosecutors said in a pre-sentencing memo filed last week that Flynn has provided information in three separate investigations, including an undisclosed criminal investigation and the probe into Russian election meddling and its possible ties to Trump and his campaign officials.
Flynn will be sentenced Tuesday in the case.
The Associated Press contributed to this report.