They want answers for what they allege is DOJ interference in the case.

Here's a timeline of legal and political scrutiny President Joe Biden's son Hunter Biden has faced during a yearslong probe into his personal and professional life.

Special counsel David Weiss is using an LA-based federal grand jury to pursue its yearslong investigation into Hunter Biden's tax affairs, sources confirmed to ABC News.

Hunter Biden claims Trump applied pressure to a criminal investigation to him.

David Weiss appeared for voluntary testimony Tuesday behind closed doors.

Rep. James Comer is planning to issue multiple subpoenas aimed at President Joe Biden's family, which could be issued as soon as Wednesday, sources tell ABC News.

Hunter Biden is urging the DOJ to investigate a former business associate over claims that he lied to federal investigators about his family's business dealings.

A gun count that had been part of a collapsed plea deal in the Hunter Biden case has been dismissed as a judge signed off on a prosecution request

President Joe Biden's son Hunter Biden formally entered a plea of not guilty to felony gun charges Tuesday.

President Joe Biden's son pleaded not guilty to felony gun charges.

The president's son faces three felony counts. He's accused of lying about his drug use in 2018 on a federal form when buying a gun.

Hunter Biden is expected to plead not guilty Tuesday when he is arraigned on three gun charges that were originally part of a federal plea deal that fell apart in July.

Devon Archer's testimony was often cited in the House GOP's first impeachment inquiry hearing.

Rep. James Comer said he will issue subpoenas "today" for bank records for Hunter Biden and James Biden as part of their impeachment inquiry into President Joe Biden.

Law professor Michael Gerhardt, who was a witness for the Democrats, testified in front of the House Oversight Committee.

Hunter Biden has sued Rudy Giuliani, accusing the former Trump attorney of computer fraud for his role in obtaining the contents of a laptop purportedly belonging to him.

Republican lawmakers grilled Attorney General Merrick Garland over his department's handling of criminal probes into former President Donald Trump, Hunter Biden, Jan. 6 and investigations.

A judge has denied Hunter Biden's effort to avoid appearing in person at his arraignment on federal gun charges, ordering him to appear at a hearing scheduled for Oct. 3.

A judge has denied Hunter Biden's effort to avoid appearing in person at his arraignment on federal gun charges, ordering him to appear at a hearing scheduled for Oct. 3.

Hunter Biden is expected to enter a plea of not guilty when he is arraigned on federal gun charges, his attorney wrote in court filings Tuesday.

Hunter Biden has filed a suit against the IRS over alleged "unlawful disclosures" made by two whistleblowers who accused prosecutors of mishandling their probe into him.

Hunter Biden has filed a suit against the IRS over alleged "unlawful disclosures" made by two whistleblowers who accused prosecutors of mishandling their probe into him.

Democrats on Sunday sought to play down the ramifications in Washington from the indictment of Hunter Biden while Republicans seized on the development

A father might not face possible impeachment if not for what his son has done.

ABC News’ chief Washington correspondent analyzes charges brought against the president’s son and shares insights from his new book, “Tired Of Winning.”

With prosecutors continuing to scrutinize Hunter Biden's finances and business deals, the gun charges levelled against him might be just part of his legal troubles.

ABC News contributors break down the president's son's charges related to false statements and illegal possession of a firearm.

Abbe Lowell talks about the charges against President Joe Biden’s son, Hunter, and how he plans to defend his client.

President Joe Biden's son is charged with three counts.

The attorney for President Joe Biden's son Hunter Biden, who is facing felony gun charges, spoke to ABC News on "Good Morning America."

The White House is not commenting on the gun charges brought against Hunter Biden.

The president’s son is accused of lying about his drug use to purchase a handgun and possessing a gun illegally.

The president's son has been charged by the special counsel two months after a plea agreement he struck with prosecutors imploded.

U.S. Attorney David Weiss was appointed special counsel in the case last month.

ABC News Chief Legal Analyst Dan Abrams discusses the three charges against Biden.

President Joe Biden's son was indicted on charges related to false statements and illegal possession of a firearm.

Attorneys for Hunter Biden on Wednesday filed suit against a former Trump White House aide over his alleged role in publishing emails and embarrassing images online.