The Senate Judiciary Committee will be briefed next week by a Russian corruption expert who will testify about Natalia Veselnitskaya’s ties to Kremlin spies.

Veselnitskaya is a Russian lawyer who met with Donald Trump, Jr., Paul Manafort and Jared Kushner in June of 2016.

"William Browder, an American financier who has investigated Russian corruption for more than a decade, will brief the Senate Judiciary Committee at a hearing next week on the lawyer Natalia Veselnitskaya’s ties to the Russian government—including to former top members of the GRU and the FSB, two of the Kremlin’s main intelligence agencies," The Daily Beast reports.

Documents provided by Browder,"delve into the backgrounds of attorneys, lobbyists, and business executives behind what Browder says is a concerted push by the Russian government to roll back U.S. sanctions imposed in 2012. That network is also at the center of new evidence that Donald Trump Jr., the president’s eldest son, solicited damaging information on Democratic presidential nominee Hillary Clinton from people whom he was told were representing, and passing on information from, the Russian government."

The hearing will investigate the "Human Rights Accountability Global Initiative (HRAGI) Foundation" which has lobbied to ease sanctions on Russian oligarchs.

Trump Jr.'s contact, the Kremlin-connected lawyer Natalia Veselnitskaya represents HRAGI.