Former FBI Deputy Director Andrew McCabe, who arranged the bureau's interview with then-national security adviser Michael Flynn at the White House on Jan. 24, 2017 — the interview that ultimately led to Flynn's guilty plea on one count of making false statements — suggested Flynn not have a lawyer present at the session, according to newly-filed court documents. In addition, FBI officials, along with the two agents who interviewed Flynn, decided specifically not to warn him that there would be penalties for making false statements because the agents wanted to ensure that Flynn was "relaxed" during the session.

The new information, drawn from McCabe's account of events plus the FBI agents' writeup of the interview — the so-called 302 report — is contained in a sentencing memo filed Tuesday by Flynn's defense team.

Citing McCabe's account, the sentencing memo says that shortly after noon on Jan. 24 — the fourth day of the new Trump administration — McCabe called Flynn on a secure phone in Flynn's West Wing office. The two men discussed business briefly and then McCabe said that he "felt that we needed to have two of our agents sit down" with Flynn to discuss Flynn's talks with Russian officials during the presidential transition.

McCabe, by his own account, urged Flynn to talk to the agents alone, without a lawyer present. "I explained that I thought the quickest way to get this done was to have a conversation between [Flynn] and the agents only," McCabe wrote. "I further stated that if LTG Flynn wished to include anyone else in the meeting, like the White House counsel for instance, that I would need to involve the Department of Justice. [Flynn] stated that this would not be necessary and agreed to meet with the agents without any additional participants."

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Within two hours, the agents were in Flynn's office. According to the 302 report quoted in the Flynn sentencing document, the agents said Flynn was "relaxed and jocular" and offered the agents "a little tour" of his part of the White House.

"The agents did not provide Gen. Flynn with a warning of the penalties for making a false statement under 18 U.S.C. 1001 before, during, or after the interview," the Flynn memo says. According to the 302, before the interview, McCabe and other FBI officials "decided the agents would not warn Flynn that it was a crime to lie during an FBI interview because they wanted Flynn to be relaxed, and they were concerned that giving the warnings might adversely affect the rapport."

The agents had, of course, seen transcripts of Flynn's wiretapped conversations with Russian then-ambassador Sergey Kislyak. "Before the interview, FBI officials had also decided that if 'Flynn said he did not remember something they knew he said, they would use the exact words Flynn used ... to try to refresh his recollection. If Flynn still would not confirm what he said ... they would not confront him or talk him through it,'" the Flynn memo says, citing the FBI 302.

"One of the agents reported that Gen. Flynn was 'unguarded' during the interview and 'clearly saw the FBI agents as allies,'" the Flynn memo says, again citing the 302.

Later in the memo, Flynn's lawyers argue that the FBI treated Flynn differently from two other Trump-Russia figures who have pleaded guilty to and been sentenced for making false statements. One of them, Alexander Van der Zwaan, "was represented by counsel during the interview; he was interviewed at a time when there was a publicly disclosed, full-bore investigation regarding Russian interference in the 2016 election; and he was given a warning that it is a federal crime to lie during the interview," according to the memo. The other, George Papadopoulos, "was specifically notified of the seriousness of the investigation...was warned that lying to investigators was a 'federal offense'...had time to reflect on his answers...and met with the FBI the following month for a further set of interviews, accompanied by his counsel, and did not correct his false statements."

The message of the sentencing memo is clear: Flynn, his lawyers suggest, was surprised, rushed, not warned of the context or seriousness of the questioning, and discouraged from having a lawyer present.

That is all the sentencing document contains about the interview itself. In a footnote, Flynn's lawyers noted that the government did not object to the quotations from the FBI 302 report.

In one striking detail, footnotes in the Flynn memo say the 302 report cited was dated Aug. 22, 2017 — nearly seven months after the Flynn interview. It is not clear why the report would be written so long after the interview itself.

The brief excerpts from the 302 used in the Flynn defense memo will likely spur more requests from Congress to see the original FBI documents. Both House and Senate investigating committees have demanded that the Justice Department allow them to see the Flynn 302, but have so far been refused.

In the memo, Flynn's lawyers say that he made a "serious error in judgment" in the interview. Citing Flynn's distinguished 30-plus year record of service in the U.S. Army, they ask the judge to go along with special counsel Robert Mueller's recommendation that Flynn be spared any time in prison.

Flynn is scheduled to be sentenced on Dec. 18.

[Related: Not done yet? Mueller hails former Trump adviser Flynn’s help 'with several ongoing investigations']