Former Trump National Security Adviser Michael Flynn will plead guilty today to lying to the FBI about his contacts with Russian government officials.

The U.S. District Court for the District of Columbia has scheduled a plea hearing for Flynn that is set to take place at 10:30 a.m. ET. In the hearing, Flynn will plead guilty to making “materially false, fictitious, and fraudulent” statements to FBI agents this past January.

Specifically, he falsely told the FBI that he did not tell the Russian ambassador to the United States that the country should “refrain” from escalating tensions between the two countries in the wake of new sanctions leveled against it by the outgoing Obama administration.

The Russian government did not retaliate against the Obama administration’s new sanctions late last year, and Donald Trump himself praised this decision as “very smart” on Twitter.

His tweet was subsequently promoted by the Russian embassy of the United States’ official Twitter account.

Speculation about Flynn cooperating with special counsel Robert Mueller’s probe spiked in late October when the special counsel hit former Trump campaign chairman Paul Manafort with an indictment that included money laundering allegations.

Flynn resigned as national security adviser this past February, less than a month into Trump’s first term, when it was revealed that he had lied about conversations he’d had with Vladimir Putin about potential sanctions relief.