Hunter Biden has been indicted on nine tax-related charges, including three felony counts, according to court documents filed Thursday in a federal court in Los Angeles.
The charges were brought by special counsel David Weiss.
The case was assigned to Judge Mark Scarsi, who was appointed by former President Donald Trump.
The White House declined to comment on the charges against the president's son and referred NBC News to Hunter Biden's personal attorneys as well as the Justice Department. Neither immediately provided a comment.
The additional charges mark a significant development in the federal investigation that has drawn scrutiny from congressional Republicans, who have seized on Hunter Biden's legal woes as rhetorical ammunition against his father. House Republicans subpoenaed Hunter Biden in November, and his legal team has said that he's open to testifying publicly before the House Oversight Committee next week.
In July, Hunter Biden pleaded not guilty to federal tax charges following the collapse of a plea deal. A federal judge dismissed the misdemeanor charges in August. Biden had originally been expected to plead guilty to two federal misdemeanor counts of failing to pay taxes.
Hunter Biden was indicted on federal gun charges in September related to the president's son being in possession of a gun while using narcotics. Two of the counts allege that Biden completed a form saying he was not using illegal drugs when he bought a gun. Another count asserts that he possessed a firearm while using a narcotic. He pleaded not guilty.
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Attorney General Merrick Garland appointed Weiss as special counsel in August to oversee the investigation into Hunter Biden.
"As special counsel, he will continue to have the authority and responsibility that he has previously exercised to oversee the investigation and decide where, when and whether to file charges," Garland said when announcing Weiss' appointment. "The special counsel will not be subject to the day-to-day supervision of any official of the Department, but he must comply with the regulations, procedures, and policies of the Department."
Weiss was nominated by Trump in 2017 and started serving as U.S. attorney in Delaware the next year. He remained in office through the start of the Biden administration, even as most U.S. attorneys appointed during the Trump administration were asked to resign.
On Monday, Weiss asked a federal judge to deny Hunter Biden's request to subpoena Trump, former Attorney General William Barr and other Trump administration officials.
"His allegations and subpoena requests focus on likely inadmissible, far-reaching, and non-specific categories of documents concerning the actions and motives of individuals who did not make the relevant prosecutorial decision in his case," Weiss' team said.