Former national security adviser Michael Flynn faced some protesters Tuesday as he made his first appearance at a federal courthouse in D.C. since pleading guilty last year to lying to the FBI.

Some protesters chanted “lock him up” as Flynn left the courthouse, where he attended a status hearing on his case in special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE’s probe into Russian influence in the 2016 presidential election.

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Flynn had led a chant of “lock her up” in reference to former Secretary of State Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE at the Republican National Convention in 2016.

The former Trump administration official agreed to cooperate with Mueller’s probe as part of his plea deal, and his sentencing in the case has been delayed.

Flynn didn't say anything to reporters on his way out of the courthouse, he quickly got into a black SUV as a few protesters shouted "lock him up" pic.twitter.com/u088iEj0RW — Zoe Tillman (@ZoeTillman) July 10, 2018

Michael Flynn was Today Greeted With Chants Of “Lock Him Up”pic.twitter.com/0cdjr9PuIb — PoliticsVideoChannel (@politvidchannel) July 10, 2018

U.S. District Judge Emmet Sullivan on Tuesday delayed Flynn’s sentencing again, according to the Los Angeles Times.

Sullivan had called the hearing to determine why the probation office should prepare a pre-sentence report but not schedule a sentencing date at the same time, as is common practice. Mueller’s office and Flynn’s attorneys had requested the report.

Flynn’s legal team agreed Tuesday to delay preparing the report, which is used to determine the length of a sentence.

"General Flynn is eager to proceed with sentencing when that is possible," Flynn’s attorney, Robert Kelner, said, according to the Times. He added that Flynn wants to "bring an end to this chapter of his life."