The U.S. Attorney who led the federal investigation into Hunter Biden was “briefed” on the key FBI form that contained allegations that then-Vice President Joe Biden and a foreign national were engaged in a criminal bribery scheme that involved influence over U.S. policy decisions, the top Republican on the Senate Judiciary Committee revealed Wednesday.

Sen. Lindsey Graham, R-S.C., the ranking member of the Senate Judiciary Committee, sent letters to Attorney General Merrick Garland and the Trump-appointed Delaware U.S. Attorney David Weiss, who led the federal investigation into Hunter Biden demanding answers amid allegations from whistleblowers suggesting the probe was slow-walked and influenced by politics. Graham wrote to Garland and Weiss separately, seeking information on the alleged politicization that influenced decisions throughout the Hunter Biden probe.

The document in question is an FBI-generated FD-1023 form. The form, dated June 30, 2020, reflects the FBI’s interview with a “highly credible” confidential source who detailed multiple meetings and conversations he or she had with a top executive of Burisma Holdings over the course of several years, starting in 2015. Hunter Biden sat on the board of Burisma.

In the letter to Weiss, Graham said that he has “been informed that you and your office were briefed on allegations in an FD-1023 form suggesting there may have been phone calls recorded between Hunter Biden and Joe Biden with a senior official at Burisma Holdings, a Ukrainian energy company.”

“The FD-1023 in question alleges that the confidential informant told the Department of Justice and FBI that such tapes may exist,” Graham wrote.

Former Attorney General Bill Barr earlier this month said the FD-1023 form had been routed to Weiss. Sources told Fox News Digital that Weiss’ team was briefed on the FD-1023 form in September 2020.