The U.S. Court of Appeals for the D.C. Circuit has upheld the conviction of Roman Sterlingov, a dual Swedish-Russian national, for operating a bitcoin mixer known as Bitcoin Fog. The court's decision, issued on September 25, 2026, confirms that Sterlingov's actions facilitated money laundering and other illicit activities. This ruling is significant as it reinforces legal accountability in the rapidly evolving cryptocurrency landscape.

Roman Sterlingov was convicted in 2023 by a jury in the U.S. District Court for the District of Columbia. He faced multiple charges, including conspiracy to commit money laundering and operating an unlicensed money transmitting business. The court sentenced him to 150 months in prison, a decision that Sterlingov appealed. The D.C. Circuit's ruling not only affirms his conviction but also addresses broader issues related to cryptocurrency regulations and law enforcement's ability to combat financial crimes.

The case began when Sterlingov was accused of creating Bitcoin Fog, a service that allowed users to obscure the origins of their bitcoin transactions. The government alleged that the platform was specifically designed to facilitate money laundering by pooling bitcoin from various users and making it difficult to trace the source of funds. Sterlingov's arrest occurred in April 2021 at Los Angeles International Airport, marking only his second visit to the United States. Following his arrest, Bitcoin Fog ceased operations.

The prosecution presented evidence linking Sterlingov to Bitcoin Fog, including internet protocol (IP) analysis and testimony from undercover agents. The government argued that Sterlingov's actions were part of a larger conspiracy involving multiple darknet vendors engaged in illegal activities. The jury found him guilty on all counts, leading to his appeal to the D.C. Circuit.

In its ruling, the court addressed several key arguments raised by Sterlingov. The judges, including Circuit Judge Wilkins, found that the evidence presented at trial sufficiently demonstrated that Sterlingov was guilty of the charges. The court stated, "We have considered each of those arguments and find none of them meritorious. Accordingly, we affirm the District Court." This affirmation highlights the court's confidence in the jury's findings and the evidence supporting the conviction.

One of the main points of contention in the appeal was the issue of venue. Sterlingov argued that the trial should not have taken place in the District of Columbia, claiming that the crimes were not committed there. However, the court ruled that venue was appropriate, citing evidence from a sting operation conducted by a federal agent in D.C. This agent created a Bitcoin Fog account and successfully withdrew funds, establishing a connection to the district.

Another argument raised by Sterlingov involved the statute of limitations for the charges against him. He contended that the government had not provided sufficient evidence of criminal conduct within the required time frame. The court, however, found that the evidence, including transactions conducted by the undercover agent, supported the prosecution's case and fell within the statute of limitations.

The court also addressed concerns regarding the admission of expert testimony during the trial. Sterlingov challenged the reliability of testimony from experts who analyzed bitcoin transactions and the operations of Bitcoin Fog. The judges concluded that the expert testimony met the necessary standards for admissibility, reinforcing the importance of expert analysis in complex financial cases.

This ruling has broader implications for the cryptocurrency industry, particularly regarding the legal responsibilities of those who operate services like bitcoin mixers. As cryptocurrencies continue to gain popularity, the case sets a precedent for how law enforcement can pursue individuals involved in illegal activities facilitated by such technologies. The court's decision emphasizes that operators of cryptocurrency services can be held accountable for facilitating money laundering and other crimes.

Looking ahead, Sterlingov's legal team may consider further options for appeal, although the D.C. Circuit's affirmation of his conviction presents a significant hurdle. Details regarding any potential related cases or further legal actions were not available in the court filing. The outcome of this case serves as a warning to others in the cryptocurrency space about the legal risks associated with operating unregulated financial services.