While she was studying in the US on a student visa in 2016 and 2017, the FBI said, Butina was actually working to advance the interests of Russia, reporting in regularly to an unnamed senior government official.
In the run-up to the 2016 US presidential election, Butina emerged as a kind of gadfly, chatting with Governor Scott Walker of Wisconsin at an NRA convention in 2015 and attending the launch of his presidential campaign a few months later.
Later that year, at a town-hall-style forum in Las Vegas, Butina asked then-candidate Donald Trump whether he, if elected, would improve the deteriorating relationship between the US and Russia. Trump said he did think his election would improve the relationship.
The Butina investigation was undertaken by the Justice Department's national security division and isn't part of Special Counsel Robert Mueller's investigation of Russian interference in the 2016 election.
Butina was first charged in July with conspiring to defraud the US. Days later, that initial criminal complaint was upgraded to a two-count indictment accusing her of entering the US under the guise of a student visa to advance Russian interests and reporting her progress to an unnamed Russian official later identified as Alexander Torshin, who was deputy governor of Russia's Central Bank.
A former Russian senator with alleged criminal ties, Torshin is under US government sanctions. Butina was accused of attempting to set up unofficial lines of communication for him with US politicians and political organisations. To do so, she ingratiated herself with the NRA, where she and Torshin are lifetime members.
Butina, 30, entered a not guilty plea at a July 18 hearing for which she was denied permission to appear in civilian clothes and then ordered held without bail, prompting the Russian Foreign Ministry to start a "Free Maria Butina" campaign. She's an icon on its Twitter feed to this day.
Prosecutors have said that some of the millions of pages of evidence backing their case against Butina remain under seal because they relate to ongoing investigations.
In court papers, Robert Driscoll, who has been representing Butina, said his client was a legitimate American University student and worked to obtain records from the university to buttress his contention that she appeared and participated in classes there.
- Bloomberg