IRS whistleblowers who flagged Hunter Biden tax probe interference land promotions under Treasury

The two IRS agents who risked their careers to expose what they described as a strangled investigation into Hunter Biden's taxes have not only survived the ordeal but come out the other side with promotions, settlements, and senior advisory roles at the Treasury Department.

Joseph Ziegler, an IRS criminal investigator, and his supervisor Gary Shapley blew the whistle on what they say was a systematic effort by the Justice Department and IRS leadership to prevent a proper investigation of the Biden family's finances. Both faced retaliation. Both filed lawsuits. Both won.

Their cases have been settled, the related lawsuits resolved, and the agreement reportedly requires mandatory training for prosecutors. Ziegler confirmed the outcome in a recent interview with Full Measure.

"We've also received promotions at the IRS."

Ziegler credited Treasury Secretary leadership directly for the turnaround, saying the secretary "made us senior advisers to him."

What the whistleblowers say they found

The investigation began in 2018, when Ziegler uncovered potential tax fraud connected to the Biden family. What followed, according to Ziegler, was not a green light to pursue the evidence but a series of walls thrown up by DOJ officials who seemed determined to keep investigators away from anything that led back to Joe Biden, as Just The News reports.

Full Measure's interviewer put it directly: were investigators seeing evidence that could have implicated Joe Biden and barred from following that trail? Ziegler didn't hedge.

"Yeah ...That's just one example."

He detailed the restrictions in plain terms. Investigators could not speak with Biden's adult children. When interviews with other subjects raised questions that pointed toward Joe Biden, agents were told those questions were off-limits. This was while Biden was a former vice president, not even the sitting president.

"So it was very apparent from the beginning that they just didn't want to touch anything related to the former vice president at the time – wasn't even the President – Joe Biden."

Consider the scope of what Ziegler described. This was not a single overruled request or a disagreement about strategy. It was a blanket prohibition on an entire investigative direction, imposed from above, sustained over years.

"DOJ had this much control over essentially holding us down from doing a proper investigation related to the Biden family."

The pardon that proved the point

Hunter Biden eventually pleaded guilty to nine tax offenses. Nine. That alone should have been a major story. Instead, in December 2024, President Joe Biden issued a sweeping presidential pardon for his son, wiping the slate before any sentence could land.

The pardon didn't just spare Hunter Biden from consequences. It retroactively validated everything Ziegler and Shapley had been saying. If the investigation had been conducted fairly from the start, if agents had been permitted to follow the evidence wherever it led, the case might have been far larger than nine tax counts. The whistleblowers alleged they were held back precisely because the trail pointed upward.

Then the man at the top of that trail made it all disappear with a signature.

There is also the matter of a 2017 email referenced in the investigation, one that described "10% held by H for the big guy" in connection with a Chinese business deal. Investigators were not, according to Ziegler, permitted to pursue the implications of that communication. The public never got a full accounting of what "the big guy" arrangement actually meant, because the people whose job it was to find out were ordered to stand down.

Retaliation as confirmation

If Ziegler and Shapley had been wrong, they would have been ignored. Instead, they were targeted.

In the fall of 2024, the IRS moved to demote or force out Shapley entirely. This was not a quiet administrative reshuffling. It was a direct action against a whistleblower who had gone public with allegations of political interference in a federal tax investigation. The timing, well after the whistleblowing but before the change in administration, speaks for itself.

The institutional reflex was not to investigate the claims. It was to punish the people who made them. That pattern is familiar to anyone who has watched federal agencies respond to internal dissent that embarrasses the wrong people.

Both agents retained their positions. Both received promotions. The settlements and mandatory prosecutor training suggest that someone, somewhere, conceded that the retaliation claims had merit.

What the training requirement signals

The reported requirement for mandatory training for prosecutors may sound like bureaucratic boilerplate. In this context, it is closer to an institutional admission. Training mandates in settlement agreements exist because something went wrong and the agency agreed to take corrective steps. The DOJ and IRS did not settle these cases and accept training requirements because Ziegler and Shapley were making things up.

The system that almost worked

There is something worth sitting with here. Two career IRS agents did exactly what the system asks people to do. They found evidence of potential crimes. They investigated. When they were blocked, they reported it through proper channels. When proper channels failed, they went public. They endured professional retaliation for years.

And they won. Eventually.

But Hunter Biden walked free. The investigation was never permitted to reach its natural conclusion. The pardon ensured it never will. The whistleblowers got their promotions, but the public never got the full truth about what happened with the Biden family's finances.

The system protected the whistleblowers in the end. It did not protect the investigation they were blowing the whistle about. Those are two very different things, and only one of them matters to the rule of law.