Besides Trump Jr., the committee interviews publicist Rob Goldstone, who set up the meeting with the promise of dirt on Clinton, Rinat Akhmetshin, a prominent Russian-American lobbyist, Ike Kaveladze, a business associate of a Moscow-based developer and a translator.
The materials released include transcripts of interviews, written answers to questions and materials submitted by individuals including those, mentioned above.
While answering the questions, Donald Trump Jr. said that he couldn't remember whether he had discussed the Russia investigation with his father. He also told the panel that he saw nothing wrong with attending the Trump Tower meeting in which he was promised dirt on Hillary Clinton.
Donald Trump Jr., said in the testimony that he had no reason to believe his father made any policy decisions about Russia based on future business deals.
Trump Jr. said "Absolutely Not," when asked if he had "any reason to believe that your father either during the campaign or as President has made any policy decisions with respect to Russia based on any potential business deals with them in the future," the newly released transcript said.
During his testimony, Trump Jr. confirmed the Trump Organization was trying to build a Trump Tower in Moscow in late 2015 or 2016 while his father was running for president.
The development was not affected by the Trump campaign at the time, and since then, Trump Jr. said the Trump Organization has agreed not to do any deals internationally because of potential conflicts.
Mueller is heading the investigation into alleged Russia's attempt to influence the outcome of the 2016 US presidential election. Similar probes are being carried out in the Senate and the House of Representatives.
Russian officials have repeatedly refuted the accusations and stressed that the allegations of Moscow's involvement remain unfounded.