Michael Flynn may have taken a nice paycheck from Russian state media RT when he visited Moscow to sip champagne with Russian leaders and give Vladimir Putin a standing ovation, but the money he brought home from that trip is just a fraction of what he got supporting another autocratic strong-man. Now Special Counsel Robert Mueller is extending his investigation into Flynn’s bigger source of income as an unregistered foreign agent. In the process, Mueller is actually taking over an existing criminal investigation by a Virginia grand jury.

The move means Mueller’s politically charged inquiry will now look into Flynn’s paid work as a lobbyist for a Turkish businessman in 2016, in addition to contacts between Russian officials and Flynn and other Trump associates during and after the Nov. 8 presidential election.

Flynn took more than half a million dollars to go after Fethullah Gülen, an opponent of Turkish President Recep Tayyip Erdogan. The 76-year-old Gülen was regarded as one of Erdogan’s closest allies before 2013, but the two fell out when Erdogan accused Gülen of being involved with investigations that brought corruption charges against more than fifty members of Erdogan’s party. Gülen fled to the US while Erdogan placed him on Turkey’s “most-wanted-terrorist list,” even though US intelligence has found no evidence that connects Gülen with terrorism.

Erdogan also claimed that Gülen was behind a 2016 coup attempt, though again, US investigators found no connection. Turkey issued an extradition request, The Obama administration refused to comply. However, with the Trump regime on the way, and Michael Flynn both pocketing a massive check and writing anti-Gülen editorials, Erdogan was likely warming up a cell. But Flynn’s sudden departure frustrated those who had paid him for results.

Now Flynn’s time as a unregistered foreign agent for Turkey will join his work in helping Russia under Mueller’s microscope as he takes over for an existing grand jury investigation.