Donald Trump Jr met Natalia Veselnitskaya in June 2016 – they allegedly discussed compromising information on the Democratic campaign.
The White House have always denied the President was aware of the meeting before he was approached about it by the New York Times last year.
However, the President’s former lawyer, Michael Cohen, has claimed Trump was aware of the meeting – which took place at his mega Manhattan skyscraper, Trump Tower.
According to CNN, Mr Cohen is willing to give evidence supporting this to special counsel Robert Mueller, who is investigating the possibility of Russian hacking during the 2016 election.
On Wednesday, documents proved that Ms Veselnitskaya did have close ties to the Russian government.
She has always denied acting as a representative of the Russian government.
Last week, a total of 12 Russian intelligence agents were criminally indicted and accused of a “sustained effort” to hack Democrat emails and computer networks.
All 12 accused are members of the GRU, a Russian intelligence agency connected to the Russian military.
They were all acting in “their official capacities,” according to reports.
Deputy Attorney General, Rod Rosenstein said the official indictment does not name any American citizen, but has told reporters the defendants “corresponded with several Americans during the course of the conspiracy through the internet”.
He said at a news conference: “There is no allegation in this indictment that any American citizen committed a crime.”
The Justice Department has claimed hacking specifically targeted Hillary Clinton’s campaign and the Democratic Party, with the intention to “release that information on the internet under the names DCLeaks and Guccifer 2.0 and through another entity”.
Mr Mueller has asked to interview President Trump as part of his investigation but the President is yet to confirm whether he will cooperate.
Deputy White House press secretary Lindsay Walters said there is no evidence tying the Trump campaign to hacking attempts.
She said following Rosenstein’s statement: “Today’s charges include no allegations of knowing involvement by anyone on the campaign and no allegations that the alleged hacking affected the election result.
“This is consistent with what we have been saying all along.”