Michael Flynn

Former national security adviser Michael Flynn, center, arrives at federal court in Washington, D.C., on Dec. 1, 2017. Court documents show Flynn, an early and vocal supporter of Donald Trump’s on his campaign trail whose business dealings and foreign interactions made him a central focus of Robert Mueller’s investigation, was expected to admit to lying about his conversations with Russia’s ambassador to the United States during the transition period before President Trump’s inauguration.

(Susan Walsh / AP)

Associated Press

Dec. 1, 2017 10:08 AM PT

Michael Flynn, President Donald Trump’s former national security adviser, pleaded guilty to making false statements to the FBI on Dec. 1, 2017, in federal court in Washington.

Former national security adviser Michael Flynn arrives at federal court in Washington, D.C., on Dec. 1, 2017. Flynn pleaded guilty Friday to making false statements to the FBI, the first plea by any of the four former advisers of President Donald Trump charged so far in a wide-ranging investigation led by special counsel Robert Mueller.

(Susan Walsh / AP)

Michael Flynn, former national security adviser to President Donald Trump, arrives for his plea hearing at the Prettyman U.S. Courthouse on Dec. 1, 2017, in Washington, D.C.

(Chip Somodevilla / Getty Images)

Former National Security Adviser Michael Flynn arrives at the at the Prettyman U.S. Courthouse in Washington, D.C., on Dec. 1, 2017. Flynn is expected to plead guilty to lying to the FBI on two conversations with the Russian ambassador during the presidential transition in 2016.

(Michael Reynolds/EPA-EFE/REX/Shutterstock )

Former National Security Adviser Michael Flynn leaves federal court in Washington, D.C., on Dec. 1, 2017. Flynn pleaded guilty Friday to making false statements to the FBI.

(Susan Walsh / AP)

Former National Security Adviser Michael Flynn leaves federal court in Washington, D.C., on Dec. 1, 2017.

(Susan Walsh / AP)

Michael Flynn, former national security adviser to President Donald Trump, leaves federal court Dec. 1, 2017, in Washington, D.C.

(Brendan Smialowski / AFP/Getty Images)

Michael Flynn, former national security advisor to President Donald Trump, leaves following his plea hearing at the Prettyman U.S. Courthouse on Dec. 1, 2017, in Washington, D.C.

(Chip Somodevilla / Getty Images)