However, the description of the Russian official closely matches that of Alexander Torshin, a deputy governor of Russia's Central Bank who was sanctioned in April.
The filings were made public before an afternoon hearing in which a judge will decide whether to keep Butina in jail while she awaits trial on charges of conspiracy and acting as an unregistered foreign agent for Russian Federation.
"The concern that Butina poses a risk of flight is only heightened due to her connection to suspected Russian intelligence operatives", prosecutors wrote.
US federal prosecutors suggest Maria Butina used her gun-lobbying efforts to infiltrate the NRA and the Republican Party, both during the 2016 presidential campaign and after Trump's election.
She was arrested on Sunday and is scheduled to appear on Wednesday in federal court in Washington, the Justice Department said. Torshin was placed under sanction by the United States in April this year.
"Because Butina has been exposed as an illegal agent of Russian Federation, there is the grave risk that she will appeal to those within that government with whom she conspired to aid her escape from the United States", prosecutors said in a court filing Wednesday.
The Justice Department said Butina has been in contact with Russian intelligence operatives, kept contact information for several Russian agents and had a handwritten note in her Washington apartment asking how to respond to an offer of employment with a Russian intelligence agency. "She poses with toy pistols, while you are being published with real ones", according to the court filing.
Kremlin-backed Russian television calls her the "ideal victim" of anti-Russian hysteria in the U.S.
Butina's Facebook page includes numerous pictures of her and Torshin, as well as photos of her attending other events where she met well-known American politicians, including Wisconsin Governor Scott Walker.
Butina's arrest was announced as Trump flew back from Helsinki to Washington, following an inaugural summit with Putin.
She is suspected of gathering intelligence on US officials and political organizations and working to establish back-channel lines of communications for the Kremlin. Butina's attorney, Robert Driscoll, has called the allegations "overblown" and denied his client was a Russian agent.
Russian national and gun-rights advocate Maria Butina traded sex for a position in a special-interest organization, according to USA prosecutors who asked a judge to keep her in jail before trial because of her ties to Russian intelligence services. "But this relationship does not represent a strong tie to the United States because Butina appears to treat it as simply a necessary aspect of her activities".
Court papers do not name the individual or the special interest group.
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