The ongoing legal dispute between software developer Michael Lewellen and the United States Department of Justice (DOJ) reached a critical juncture this Monday as Lewellen filed a reply brief with the United States Court of Appeals for the Fifth Circuit. This filing represents the latest development in a high-stakes constitutional challenge concerning the government’s interpretation of 18 U.S.C. § 1960, a federal criminal statute governing unlicensed money-transmitting businesses. At the heart of the litigation is the question of whether the mere act of publishing non-custodial cryptocurrency software—specifically a crowdfunding tool dubbed Pharos—constitutes a criminal offense under federal law.
The case serves as a focal point for a broader national debate regarding the limits of executive authority in the digital age. As the legislative branch struggles to provide clear regulatory guardrails for blockchain technology, software developers increasingly find themselves navigating a precarious legal landscape where government agencies appear to be utilizing criminal statutes to reshape technological norms.
Chronology of the Legal Challenge
The origins of the dispute date back to Lewellen’s initial filing of a pre-enforcement challenge in the Northern District of Texas. Seeking a declaratory judgment, Lewellen aimed to establish that the publication of non-custodial software does not subject a developer to the reach of 18 U.S.C. § 1960. The statute, which mandates that money-transmitting businesses register with the Financial Crimes Enforcement Network (FinCEN), has historically been applied to institutions that hold and transfer customer funds.
The tension escalated following a series of aggressive DOJ enforcement actions against developers of privacy-focused tools, most notably those behind Tornado Cash and Samourai Wallet. In response to these actions, the district court dismissed Lewellen’s initial complaint, citing a lack of a "credible threat of prosecution." This dismissal relied heavily on a memorandum issued by then-Deputy Attorney General Todd Blanche, which outlined the DOJ’s internal enforcement priorities regarding cryptocurrency. Lewellen’s appeal to the Fifth Circuit is predicated on the argument that the lower court erred by prioritizing internal executive policy over the plain language of the criminal code.
The Conflict of Interpretations
The central friction point involves a profound disagreement between the Department of Justice and financial regulatory guidance. In 2019, FinCEN released comprehensive guidance clarifying that the mere development of software does not equate to "money transmission." A critical component of the FinCEN definition of a money transmitter is the element of custody—the ability to hold, control, or possess a user’s assets.
Lewellen’s position is that his software, Pharos, is strictly non-custodial. Under the FinCEN framework, his actions should fall outside the scope of money transmission laws. However, the DOJ has adopted an expansive, "novel" interpretation of 18 U.S.C. § 1960 that effectively bypasses the custody requirement. By treating software publishers as if they are operating as financial intermediaries, the DOJ has created a environment of uncertainty that, according to the plaintiff, creates a "credible threat" of criminal liability.
The DOJ’s legal team maintains that Lewellen’s fears are speculative and generalized, asserting that he has not been subject to any specific investigation. They argue that the Blanche memo clarifies that the government is focused on specific illicit actors, not the broader community of software developers. Conversely, the legal team representing Lewellen argues that the Blanche memo is a non-binding policy document that could be rescinded or altered at the whim of the current or any future administration, thereby failing to provide the legal certainty required to protect constitutional rights.
Key Arguments in the Fifth Circuit Appeal
In his reply brief, Lewellen outlines four distinct legal arguments to justify his right to seek a declaratory judgment:
- Standing in Pre-Enforcement Challenges: Lewellen contends that he does not need to wait for a formal investigation or an indictment to challenge the law. The purpose of a declaratory judgment is to resolve legal ambiguity before a citizen is forced to risk incarceration.
- The Precedent of Recent Prosecutions: The brief highlights the DOJ’s recent criminal charges against the developers of Tornado Cash and Samourai Wallet as concrete evidence that the government is willing to ignore FinCEN guidance. These cases serve as a "credible threat," demonstrating that the DOJ interprets 18 U.S.C. § 1960 in a way that criminalizes the act of coding and publishing software.
- The Insufficiency of Disavowal: Lewellen points out that the DOJ has repeatedly refused to formally disavow the prosecution of developers who create non-custodial software. While the government has stated in court that "mere creation" is not a crime, it has failed to clarify that publishing such software does not make the author an unlicensed money transmitter under the statute.
- The Limited Scope of the Blanche Memo: Lewellen argues that the district court improperly relied on the Blanche memo, which was issued after the lawsuit was filed. Furthermore, because the memo is a policy directive rather than a legal ruling, it does not amend the DOJ’s statutory interpretation, which remains as broad and restrictive as ever.
The Regulatory Void and Legislative Failure
The struggle to define the legal status of blockchain developers has been exacerbated by the failure of Congress to pass the Blockchain Regulatory Certainty Act (BRCA). While the act was intended to provide a stable framework for the industry, its failure to clear the legislative hurdle has left a void.
Critics of the current situation point out that even if previous versions of the BRCA had been enacted, the protection afforded to developers would have been incomplete. Most legislative proposals focused on regulatory compliance rather than immunity from criminal statutes. This means that even in a more favorable legislative climate, the core conflict regarding 18 U.S.C. § 1960 would likely have remained a matter for the judiciary to resolve. As such, the outcome of the Lewellen appeal will serve as a de facto guide for the legality of open-source development in the United States.
Broader Economic and Innovation Implications
The implications of this case extend far beyond a single developer. The United States is currently competing with global jurisdictions to attract and retain talent in the fields of distributed ledger technology and decentralized finance (DeFi). Legal experts observe that if the DOJ’s broad interpretation of § 1960 is upheld, it could trigger a "brain drain," forcing developers to relocate to more legally hospitable jurisdictions, such as Switzerland, Singapore, or the United Arab Emirates.
Furthermore, the case raises fundamental questions about the role of the First Amendment in the context of software. If the government can classify the act of writing and publishing code as an illegal financial activity, it could set a dangerous precedent for other forms of speech-based technological innovation. Industry analysts suggest that the chilling effect of potential criminal prosecution is already causing a shift in investment patterns, as venture capital firms become increasingly cautious about backing projects that could attract the attention of federal prosecutors.
Conclusion: The Road Ahead
As the Fifth Circuit prepares to hear the arguments, the case of Lewellen v. Department of Justice stands as a definitive test of the separation of powers. The judiciary must decide whether the DOJ’s interpretation of 18 U.S.C. § 1960 is a reasonable application of the law or an overreach that violates the principles of due process and regulatory clarity.
The DOJ has maintained that its enforcement actions are necessary to prevent money laundering and ensure compliance with anti-money laundering (AML) regulations. However, for proponents of decentralized technology, the current strategy amounts to "regulation by enforcement," a tactic they argue is inconsistent with the principles of a fair and transparent legal system. Whether the court will provide the clarity sought by the developer community or allow the current status quo of uncertainty to persist remains the central question of this landmark appeal. For now, Michael Lewellen and the broader community of software engineers remain in a state of legal limbo, waiting for the judiciary to determine the limits of federal power in an era of decentralized innovation.
