The Justice Department has issued an indictment of former non-profit head Kevin Oksuz for his role in a plot to hide the fact that a 2013 congressional delegation trip to Azerbaijan was funded by that country’s government.

According to the indictment, which was unsealed Monday, Kevin, also known as Kemal, Oksuz allegedly lied on disclosure forms filed with the U.S. House of Representatives Committee on Ethics prior to, and following, a privately sponsored congressional trip to Azerbaijan. Oksuz ran a Houston based nonprofit that he is accused of using to funnel money to fund the congressional trip from an oil company controlled by the Azerbaijan government.

“No House Member or employee may accept the payment of travel expenses … from a private source to participate in a trip … without prior written authorization from the [Ethics] Committee pursuant to these regulations,” according to the Ethics rules on travel.

The House Ethics Committee in 2015 determined that there was “no evidence” that 10 lawmakers and more than 30 aides “knowingly violated” congressional rules during a 2013 trip. Privately sponsored travel by House members and staff is regulated by the House Ethics panel.

Nonprofit groups are allowed to sponsor “educational” trips for lawmakers and staff, but the Ethics Committee must review the itinerary, which they did for the May 2013 trip. Nonprofit groups must also certify that they are the source of the funding for the trip. That is where Oksuz went outside the law, according to the indictment.