Citing multiple sources familiar with the investigation, NBC said Mueller's team was looking at possible charges of money laundering and lying to federal agents, and Flynn's role in a possible plan to remove an opponent of the Turkish president from the USA in exchange for millions of dollars.
Earlier this week, Professor Jacobson noted that Special Counsel Robert Mueller's investigation is focused on process crimes and other things unrelated to the goal of the Trump campaign-Russia collusion investigation.
The sources reportedly told NBC that investigators are examining Flynn's lobbying contacts and looking at possible charges of money laundering and lying to federal agents. One of those cycles was the indictment of Paul Manafort and the guilty plea disclosure for George Papadopoulos.
Mr Gullen is a rival of Recep Erdogan, the Turkish President.
Also part of Mueller's line of inquiry is the $530,000 Flynn received for consulting work on behalf of Turkey in the fall of 2016.
John Podesta Plays Victim Card in Response to Russia Investigation News
On October 23, reports came out that Mueller included the Podesta Group after Mueller investigated Manafort's finances. Before becoming a lobbyist, he worked on presidential campaigns of Eugene McCarthy, George McGovern, Edward M.
Flynn's son worked closely with his father and could be indicted at the same time as his dad.
It seems some in Washington weren't surprised by reports signaling Trump's former national security adviser may be the next person to face charges in Mueller's prove.
The younger Flynn worked with his father, including doing work on the Trump campaign.
And having Flynn's son over a barrel could get him there. Flynn did not register with the US Justice Department as a foreign agent until March 2017.
The fact Special Counsel Robert Mueller has enough evidence to charge Mike Flynn strengthens the obstruction of justice case against Donald Trump. The FBI pushed back against the request because there was no new information.