According to an indictment unsealed Tuesday by the Southern District of New York, Veselnitskaya allegedly worked with a senior Russian prosecutor to draft the findings and misled the court.
As part of her work for Prevezon, Veselnitskaya mounted an aggressive campaign against Bill Browder, a London-based businessman who is the leading force behind the Magnitsky Act.
You can read the indictment for yourself here.
According to the indictment, Veselnitskaya submitted an "intentionally misleading" declaration to the Department of Justice in a civil case involving her client, Prevezon Holdings. That report - prepared by a former British intelligence officer - purported to detail collusion between Russian officials and senior members of the Trump campaign in the run up to the 2016 presidential election.
The meeting included campaign chair Paul Manafort, Trump's son Donald Jr and son-in-law Jared Kushner.More news: What hope for markets in the US-China trade talks?
Magnitsky was arrested in Russian Federation and died in custody in 2009.
Natalia Veselnitskaya, 43, was accused by NY prosecutors of fabricating evidence and working with Russia's chief legal office while defending Prevezon Holdings, a Russian company, over an alleged tax fraud scheme to launder $230 million in 2013.
Although the indictment against Veselnitskaya - suspiciously unsealed on the eve of Trump's first-ever primetime national address - has absolutely nothing to do with the July 2016 Trump Tower meeting, that has not stopped the United States president's critics on social media and in Congress from declaring that Trump is finished, this time, for sure, yet again.
The case was settled in May 2017.
Officials have confirmed Ms Veselnitskaya is now wanted by the US Attorney's Office in NY.
According to the indictment, Veselnitskaya sought to deny the USA government's partial summary judgment motion in 2015 by providing the court with a copy of a report produced by the Russian government that purported to exonerate all Russian government personnel involved in the alleged scheme.
In 2014, American investigators asked their Russian counterparts for documents related to the fraud and received in response a 14-page document that exonerated Russian government officials from any involvement in the scheme and claimed it had in fact been perpetrated by Magnitsky.
It is not unusual for US prosecutors to reach out in good faith to their counterparts in other countries to request information when working on transnational cases.