A long-running legal saga pitting a former Foreign Service Officer against the State Department came to an abrupt halt this week, as a federal judge dismissed a civil lawsuit alleging a federal agent used lies and “inflammatory” testimony to destroy a diplomat’s reputation.
On Thursday, U.S. District Judge Reggie B. Walton granted the government’s motion to dismiss the case brought by Paul Guertin, a former diplomat who served in China and Pakistan. Guertin sought damages for the loss of his career, arguing that State Department investigators fabricated evidence to paint him as a security threat involved in a gambling ring.
While Guertin previously scored a victory when the D.C. Circuit affirmed the dismissal of criminal charges against him in 2023, his attempt to turn the tables and sue the government for damages failed to clear the high hurdles of sovereign immunity.
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The Allegations
Guertin’s lawsuit centered on the conduct of Robin Leipfert, a Special Agent with the State Department’s Office of Inspector General (OIG). Guertin alleged that Leipfert, beginning in 2016, “assumed unsupervised responsibility” for an investigation that eventually led to the suspension of his Top Secret security clearance and his resignation in 2017.
According to court documents, investigators obtained warrants to search Guertin’s trash and digital accounts, suspecting he was involved in illegal gambling and visa fraud. Guertin claimed Agent Leipfert secured these warrants by submitting affidavits riddled with “false statements and material omissions.”
Specifically, Guertin alleged Leipfert misrepresented an old email to frame lawful visa adjudications as fraud and bribery. He further claimed the agent gave “perjured” testimony to a grand jury, falsely accusing him of sharing sensitive intelligence and sending “disgusting” sexual material to a former partner.
The grand jury indicted Guertin on wire fraud and obstruction charges in 2021, but a district court judge later dismissed the indictment for failing to state an offense—a ruling upheld by an appeals court.
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The dismissal
Despite the collapse of the criminal case against him, Judge Walton ruled that Guertin’s civil claims for damages could not proceed under the Federal Tort Claims Act (FTCA).
The court found that Guertin’s claims regarding invasion of privacy, emotional distress, and negligent supervision were effectively claims of “libel and slander” in disguise. Under the FTCA, the United States retains sovereign immunity against claims arising from defamation.
“Because the plaintiff’s injuries flow from the content and dissemination of those alleged falsehoods, his claims… fall squarely within the FTCA’s libel and slander exception,” Walton wrote.
The court also dismantled Guertin’s count of malicious prosecution. To win that claim, a plaintiff must prove there was no probable cause for the underlying investigation. Judge Walton noted that in the previous criminal proceedings, courts had already determined that probable cause existed to search Guertin’s accounts, even if the disputed facts from Agent Leipfert were removed from the equation.
Finally, the court rejected the claim of abuse of process. Judge Walton noted that while Guertin alleged the agent acted with “ulterior motives” and bad faith, the legal tools used—warrants and indictments—were utilized for their intended purpose: prosecution.
“The entirely justified prosecution of another… does not become abuse of process merely because the instigator dislikes the accused,” Walton noted, citing legal precedent.
The dismissal leaves Guertin without a path to financial recourse from the federal government for the investigation that he says cost him his livelihood.
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