ALEXANDRIA, Va. (AP) — A jury on Tuesday acquitted on all counts a think tank analyst accused of lying to the FBI about his role in the creation of a discredited dossier about former President Donald Trump.

The case against Igor Danchenko was the third and possibly final case brought by Special Counsel John Durham as part of his probe into how the FBI conducted its own investigation into allegations of collusion between the 2016 Trump campaign and the Kremlin.

The first two cases ended in an acquittal and a guilty plea with a sentence of probation.

It was the first of the three cases to delve deeply into the origins of the “Steele dossier,” a compendium of allegations that Trump’s 2016 presidential campaign was colluding with the Kremlin.

Most famously, it alleged that the Russians could have blackmail material on Trump for his supposed interactions with prostitutes in a Moscow hotel. Trump derided the dossier as fake news and a political witch hunt when it became public in 2017.

Danchenko, by his own admission, was responsible for 80% of the raw intelligence in the dossier and half of the accompanying analysis, though trial testimony indicated that Danchenko was shocked and dismayed about how Steele presented the material and portrayed it as factual when Danchenko considered it more to be rumor and speculation.

Prosecutors said that if Danchenko had been more honest about his sources, the FBI might not have treated the dossier so credulously. As it turned out, the FBI used material from the dossier to support applications for warrantless surveillance of a Trump campaign official, Carter Page, even though the FBI never was able to corroborate a single allegation in the dossier.

Prosecutors said Danchenko lied about the identity of his own sources for the material he gave to Steele. The specific charges against Danchenko allege that he essentially fabricated one of his sources when the FBI interviewed him to determine how he derived the material he provided for the dossier.

Danchenko told the FBI that some of the material came when he received an anonymous call from a man he believed to be Sergei Millian, a former president of the Russian-American Chamber of Commerce.

Prosecutors said Danchenko’s story made no sense. They said that phone records show no evidence of a call, and that Danchenko had no reason to believe Millian, a Trump supporter he’d never met, was suddenly going to be willing to provide disparaging information about Trump to a stranger.

Danchenko’s lawyers, as a starting point, maintain that Danchenko never said he talked with Millian. He only guessed that Millian might have been the caller when the FBI asked him to speculate. And they said he shouldn’t be convicted of a crime for making a guess at the FBI’s invitation.

That said, Danchenko’s lawyers say, he had good reason to believe the caller may well have been Millian. The call came just a few days after Danchenko had reached out to Millian over email after a mutual acquaintance brokered a connection over email.

And Danchenko’s lawyers say it’s irrelevant that his phone records don’t show a call because Danchenko told the FBI from the start that the call might have taken place over a secure mobile app for which he had no records.

The jury began deliberations Monday afternoon after hearing closing arguments on four counts. On Friday, U.S. District Judge Anthony Trenga threw out a fifth count, saying prosecutors had failed to prove it as a matter of law.

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