Pinedo "made a mistake" but "had absolutely no knowledge" about who was buying the information or their motivations, his lawyer said.
Former Donald Trump presidential campaign foreign policy adviser George Papadopoulos, right, who pleaded guilty to one count of making false statements to the FBI during the agency's Russian Federation probe, holds hands with his wife Simona Mangiante, as they arrive at federal court for sentencing, Friday, Sept. 7, 2018, in Washington. Prosecutors said in a court filing that Papadopoulos' "lies negatively affected the FBI's Russian Federation investigation, and prevented the FBI from effectively identifying and confronting witnesses in a timely fashion".
"As an influential foreign policy adviser to the Trump campaign, Mr. Papadopoulos was informed that Russian Federation had "dirt" on Hillary Clinton in the form of "thousands of emails" at a critical time during the campaign", Warner said.
At a campaign meeting at the end of March 2016 Papadopoulos told Trump, then-senator and now Attorney General Jeff Sessions, and other campaign officials that he had connections in London that could set up a Trump-Putin meeting ahead of the November election.
At one point, Thomas Breen, Papadopoulos' lawyer, presented a curious line of argument for leniency during the sentencing. He hasn't returned since.
Ex-Trump campaign aide jailed in Russia probe
The president told reporters on Air Force One on Friday that "I don't know Papadopoulos". The deal included a possible prison sentence of up to five years and three months.
He told the US District Court in Washington DC: "I made a awful mistake for which I paid dearly and I am terribly ashamed".
Papadopoulos told the judge that his entire life has been turned upside down due to this case, and that it has caused him to become "terribly depressed".
During his January 2017 interview with the FBI, Papadopoulos misled investigators about when he was told Russian Federation allegedly had dirt on Ms. Clinton.
Trump and his allies have repeatedly downplayed Papadopoulos' role on the campaign, with one of them describing him as a mere "coffee boy".
Outside the courthouse Friday, Breen said Papadopoulos didn't recall ever telling anyone in the campaign about the fact that Russian Federation had dirt on Clinton in the form of emails.
Sessions has previously testified to Congress that he pushed back against the proposal, but the memo filed by Papadopoulos's lawyers contradicts Sessions' account, saying that both Trump and Sessions appeared receptive to the idea.
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Papadopoulos' attorneys had asked for probation for their client and said in court filings that Papadopoulos misled investigators to try to save his professional ambitions and out of a "perhaps misguided loyalty to his master" but not for more sinister reasons.
The $28 million price tag cited by Mr. Trump is likely a reference to the cost of the Mueller probe. "A great day for America!" the president tweeted.
In court Friday, prosecutor Andrew Goldstein said Papadopoulos' cooperation "didn't come close to the standard of substantial assistance".
The professor had reportedly not been in contact with prosecutors in Italy seeking to question him over allegations of financial wrongdoing and his fiancé told Business Insider earlier this year that she could not reach him.
Also on August 21, a jury in federal court in Alexandria, Virginia, found former Trump election campaign chairman Paul Manafort guilty on eight of 18 charges of filing false tax returns, failing to disclose his offshore bank accounts and bank fraud.
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USA president Donald Trump slammed the decision while others posted pictures of burning Nike trainers and clothing in protest . College of the Ozarks plans to remove all athletic uniforms purchased from Nike or that contain the Nike emblem.