Hunter Biden’s legal team is calling on the Treasury Department to investigate a former Trump aide for circulating federal bank records linked to the president’s son and asking Congress to take action against Rep. Marjorie Taylor Greene for her statements about Biden.

The letters sent Monday morning to the House Ethics Committee and the Treasury Department’s Office of Inspector General and obtained by NBC News are among the latest efforts in an increasingly public and aggressive strategy by Hunter’s legal team. Biden, led by attorney Abbe Lowell.

Lowell declined to comment.

The Treasury letter notes that former Trump White House adviser Garrett Ziegler obtained and posted on his website five Suspicious Activity Reports, or SARs, from JPMorgan Chase involving or related to Hunter Biden.

Financial institutions are required to file SARs with the Treasury Department whenever there are transactions that may indicate illegal activity. Unauthorized SAR disclosures, which are confidential, can be criminally prosecuted.

The letter notes that Ziegler has previously stated that he worked with a member of JPMorgan Chase to obtain the SARs and calls for Ziegler to be investigated for possible violation of federal banking laws.

Image: Garrett Ziegler, second right, at the White House with Donald Trump.
Garrett Ziegler, second right, at the White House with Donald Trump.White House Photo/Garrett Ziegler via Truth Social

“Ziegler has used Mr. Biden’s SARs and other financial records to craft a false narrative that Mr. Biden is associated with a human trafficking ring. In his persistent and ongoing broadcast of this fictitious story, Ziegler has called on House Oversight Committee Chairman James Comer to release Mr. Biden’s private information to an even broader audience.»

The letter notes that the Republican-led House Oversight Committee released excerpts from two of the SARs in a recent report titled «A Compromised President: The Biden Family Investigation» and that at a press conference Comer, R- Ky., “falsely stated that a SAR ‘connects Hunter Biden and his business associates to international human trafficking, among other illegal activities.’”

Ziegler, who worked in the Trump White House as an aide to economic adviser Peter Navarro, recently came under the spotlight of Biden’s legal team for his alleged role in obtaining and disseminating Biden’s personal data, the sources said. She was among 11 people who were sent evidence preservation letters in February in anticipation of future litigation, as NBC News previously reported.

The letter to the Treasury Department also notes that Ziegler has sought to become involved in Biden’s ongoing child custody case in Arkansas as an «expert witness,» which may have contributed to his access to Biden’s sensitive financial information. «Surely not a coincidence, once Ziegler got involved in that child support case, he immediately began bragging in public that he has access to Mr. Biden’s tax returns.»

Ziegler, the Treasury Department and Comer’s office did not immediately respond to requests for comment.

In their letter to the House Ethics Committee, Biden’s lawyers request that action be taken against Greene, a Georgia Republican, for her statements and conduct regarding Biden, alleging violations of the House Code of Ethics and rules of official conduct. “Representative Greene’s unethical conduct stems from her continued verbal attacks, defamatory statements, posting of photos and personal details of her, and promotion of conspiracy theories about and against Robert Hunter Biden. None of these could be considered part of any legitimate legislative activity,” the letter says.

The letter notes that Greene has alleged on Twitter that the Biden family was involved in a human trafficking ring and that in January he posted photos of Hunter Biden and his niece and another family member on his Truth Social account, suggesting they were prostitutes.

Greene did not immediately respond to a request for comment.