In a supplemental sentencing memo filed on Tuesday, US Justice Department prosecutors amended their request for leniency for former national security advisor to Donald Trump, Michael Flynn, instead seeking prison time.

Previously, the prosecutors had been open to a sentence of probation for Flynn, who in 2017 pleaded guilty to lying to FBI investigators about his contacts with a Russian ambassador. Reversing their request for probation, the prosecutors this week asked the judge to deliver a sentence of up to six months of incarceration.

Flynn’s sentencing has been delayed several times since his guilty plea, given ongoing investigations and trials. “[T]he intervening years have included periods where the defendant has sought to assist and aid the government, and periods where the defendant has sought to thwart the efforts of the government,” the prosecutors wrote. Now, they say, “the government does not believe the defendant should receive credit for acceptance of responsibility,” citing Flynn’s “abuse of trust” in addition to the seriousness of the misconduct underlying his conviction and his behaving “as though the law does not apply to him.”

Flynn’s sentencing is scheduled for January 28.