On Monday, software developer Michael Lewellen filed a pivotal reply brief in the United States Court of Appeals for the Fifth Circuit, escalating his legal battle against the Department of Justice (DOJ). At the heart of the dispute is a fundamental disagreement over the scope of 18 U.S.C. § 1960, a federal criminal statute governing unlicensed money-transmitting businesses. Lewellen, who is developing "Pharos," a non-custodial software designed to facilitate decentralized crowdfunding, is seeking a declaratory judgment to clarify that the act of publishing code does not constitute operating a money-transmitting business under federal law.
The case has become a lightning rod for the broader cryptocurrency community, which has grown increasingly concerned that the DOJ is bypassing legislative channels to redefine financial regulation through aggressive criminal enforcement. As federal legislative efforts like the Blockchain Regulatory Certainty Act (BRCA) have stalled, the judicial branch has emerged as the final arbiter for software developers seeking to operate without the constant threat of federal indictment.
Chronology of the Legal Conflict
The trajectory of this case highlights the growing tension between rapid technological innovation and static regulatory frameworks. The conflict began when Lewellen initiated a pre-enforcement challenge in the Northern District of Texas. He argued that the DOJ’s expansive interpretation of 18 U.S.C. § 1960 creates a credible, chilling effect on his ability to release his software to the public.
Following the filing, the case faced a significant procedural hurdle. Then-Deputy Attorney General Todd Blanche issued an internal memorandum outlining the DOJ’s updated enforcement priorities regarding cryptocurrency. The district court interpreted this memo as evidence that Lewellen faced no "credible threat" of prosecution, leading to a dismissal of his case. Lewellen’s appeal to the Fifth Circuit argues that the district court erred by relying on a non-binding policy memo that fails to address the underlying statutory interpretation currently used by prosecutors to target developers.
The Statutory Conflict: 18 U.S.C. § 1960 and FinCEN
To understand the stakes, one must examine the divergence between the Financial Crimes Enforcement Network (FinCEN) and the DOJ. In 2019, FinCEN issued formal guidance explicitly stating that the mere development and distribution of software does not equate to "money transmission." A critical component of the federal definition of money transmission is the element of custody—the ability to hold, control, or transfer user funds.
Despite this, the DOJ has frequently adopted a more aggressive stance. In the prosecution of Tornado Cash and Samourai Wallet developers, the DOJ asserted that the creation of non-custodial tools that facilitate privacy or decentralized transactions inherently triggers registration requirements under 18 U.S.C. § 1960. By failing to register as a money services business (MSB), these developers were charged with operating unlicensed businesses. Lewellen’s legal team contends that this interpretation is a "novel" and unlawful expansion of the statute, which effectively turns every developer of decentralized software into a potential target for criminal prosecution.
Core Legal Arguments of the Appellant
In his latest brief, Lewellen outlines four distinct legal arguments to establish his standing and the merits of his claim:
- Standing and the Pre-Enforcement Challenge: Lewellen argues that a citizen should not be required to wait for a federal raid or indictment to challenge the constitutionality or application of a law. He asserts that the Fifth Circuit must accept his factual allegations—namely that Pharos is non-custodial and that the DOJ’s stated enforcement philosophy would classify it as a criminal enterprise—as true at this stage of the litigation.
- The "Credible Threat" of Prosecution: The DOJ has argued that Lewellen’s fear is "generalized." Conversely, Lewellen cites the recent prosecutions of other developers as tangible evidence that the government is willing to "overread" the statute to include non-custodial software. He maintains that he does not need to replicate the exact actions of those previously prosecuted to be at risk; he only needs to demonstrate that the DOJ’s current legal theory would sweep his conduct into the definition of a criminal money transmitter.
- The Insufficiency of the Blanche Memo: Lewellen posits that the Blanche memo is a flexible policy document, not a change in law. Because it does not explicitly disavow the DOJ’s authority to prosecute software developers under § 1960, it provides no lasting protection. Furthermore, because the memo was issued after the lawsuit was filed, it cannot be used to retroactively negate the standing of a plaintiff who was under threat at the time of the initial filing.
- Refusal to Disavow: A central theme of the appeal is the DOJ’s persistent refusal to state that the publication of non-custodial software is lawful. While prosecutors have occasionally dropped specific charges in other cases, they have consistently maintained their underlying interpretation of the law. Lewellen argues that until the DOJ acknowledges that non-custodial software development is exempt from § 1960, the threat of imprisonment remains a real and present danger.
Data and Industry Context
The implications of this case extend far beyond a single developer. The cryptocurrency industry has seen a marked shift in investment and development activity away from the United States, often cited by industry groups as a result of "regulation by enforcement."
According to recent data from Coin Center, the lack of legal clarity has created a "chilling effect" on open-source contributions. Developers are increasingly reluctant to publish code on platforms like GitHub if that code can be interpreted as a financial service. The uncertainty surrounding 18 U.S.C. § 1960 creates a binary choice for developers: register as a money transmitter—a process that is often technically impossible for decentralized, non-custodial software—or risk felony charges carrying significant prison time.
The Role of the Blockchain Regulatory Certainty Act (BRCA)
The legislative landscape has been equally tumultuous. The BRCA, which was intended to provide a "safe harbor" for software developers and miners, was introduced as part of a larger legislative package. However, even if the most recent version of the bill had passed, legal experts noted that it would have only provided limited protection.
The bill was primarily focused on regulatory compliance rather than the criminal statute § 1960. As critics pointed out, a developer could potentially be compliant with regulatory registration requirements but still face criminal prosecution under the specific subsections of § 1960 that the DOJ has successfully weaponized in recent years. This suggests that even with a more robust legislative framework, the courts would still be required to define the limits of federal power over software publishing.
Broader Implications for Innovation
The outcome of the Lewellen case is likely to set a significant precedent for the Fifth Circuit and potentially influence other jurisdictions. If the court rules in favor of the DOJ, it would effectively codify the government’s power to prosecute software developers based on the functionality of their code, regardless of whether they have custody of funds. Such a ruling would likely accelerate the "brain drain" of blockchain engineering talent to more permissive jurisdictions.
Conversely, a ruling for Lewellen would provide a necessary check on the DOJ’s expansion of criminal law. It would establish a clear distinction between the actual movement of money and the act of providing the tools for financial interaction. This would reinforce the principle that software—as a form of speech or technical utility—should not be subject to the same regulatory burdens as traditional, custodial financial institutions.
As the case moves forward, the legal community will be watching closely to see if the Fifth Circuit acknowledges the distinction between a financial intermediary and a software author. For Michael Lewellen, the goal remains simple: to obtain the legal certainty required to innovate without the looming specter of federal prosecution. For the broader industry, the case represents a critical test of whether the U.S. legal system can adapt to the realities of a decentralized, digital economy or whether it will continue to rely on statutes drafted for the analog age to govern the future of finance.
