The ongoing legal confrontation between cryptocurrency software developer Michael Lewellen and the United States Department of Justice reached a critical juncture on Monday as legal counsel filed a comprehensive reply brief in the United States Court of Appeals for the Fifth Circuit. The legal challenge targets what Lewellen characterizes as an overbroad and legally flawed interpretation of 18 U.S.C. § 1960, a federal criminal statute traditionally designed to penalize unlicensed money-transmitting businesses. At the heart of the dispute is Lewellen’s desire to publish and operate "Pharos," a non-custodial software application engineered to facilitate decentralized crowdfunding.
The lawsuit, originally initiated as a pre-enforcement challenge in the United States District Court for the Northern District of Texas, seeks a judicial declaratory judgment. Lewellen asks the court to affirm that the mere creation, publication, and operation of non-custodial software does not subject developers to federal criminal liability under the nation’s anti-money laundering statutes. However, the district court previously dismissed the challenge, ruling that Lewellen faced no credible threat of prosecution. That dismissal prompted the current appeal to the Fifth Circuit, placing the legal rights of software developers at the forefront of national scrutiny as regulatory clarity from Capitol Hill remains stalled.
Chronology of Events and Regulatory Context
The genesis of the current legal battle traces back to evolving enforcement strategies by federal prosecutors targeting privacy-enhancing and decentralized technologies within the cryptocurrency sector. Historically, federal financial watchdogs have maintained clear distinctions between entities that hold customer assets and those that merely write code.
In May 2019, the Financial Crimes Enforcement Network, a bureau of the U.S. Department of Treasury commonly known as FinCEN, issued formal guidance regarding convertible virtual currencies. This foundational document explicitly stated that software developers who merely create applications without taking custody or control of customer funds do not engage in money transmission. According to FinCEN, the exercise of operational control over user assets is an indispensable statutory prerequisite for qualifying as a money-services business.
Despite this administrative guidance, the Department of Justice has increasingly bypassed federal regulatory frameworks to pursue criminal indictments against blockchain developers. High-profile prosecutions have targeted the creators of privacy tools such as Tornado Cash and Samourai Wallet. In these cases, federal prosecutors utilized expansive interpretations of 18 U.S.C. § 1960 to argue that publishing code that facilitates decentralized financial transactions constitutes operating an unlicensed money-transmitting business.
Confronted with the chilling effect of these criminal actions, Michael Lewellen filed his pre-enforcement lawsuit to preemptively clarify his legal status before launching Pharos. Following the initiation of the lawsuit, then-Principal Associate Deputy Attorney General Todd Blanche issued an internal memorandum outlining enforcement priorities for cryptocurrency prosecutions. Leveraging this memo, the district court concluded that Lewellen lacked standing to sue because he faced no imminent threat of prosecution, leading to the dismissal now being contested in the Fifth Circuit.
Core Legal Arguments in the Fifth Circuit Reply Brief
Lewellen’s reply brief dismantles the district court’s reliance on the Blanche memorandum and directly challenges the Justice Department’s standing arguments through four distinct legal pillars.
First, the brief defends Lewellen’s standing to bring a pre-enforcement action. The DOJ has argued that the developer’s fear of prosecution is overly generalized because law enforcement agencies have not launched formal investigations or directed explicit threats toward him. Lewellen’s legal team counters that forcing a citizen to wait for a federal indictment before seeking judicial clarification defeats the entire purpose of the Declaratory Judgment Act. Furthermore, at this procedural stage, appellate courts are legally bound to accept the plaintiff’s factual assertions regarding how Pharos operates—assertions that confirm the DOJ’s stated enforcement positions would classify the software as an unlicensed money-transmitting business.
Second, the brief addresses the chilling impact of past federal prosecutions. The DOJ contended that Lewellen cannot simultaneously claim to be a law-abiding citizen while expressing a fear of prosecution under the statutory subsections applied in the Tornado Cash and Samourai Wallet cases. Lewellen’s attorneys argue this logic fundamentally misinterprets the reality of prosecutorial overreach. The government’s expansive reading of Section 1960(b)(1) treats the publication of non-custodial software as equivalent to operating a financial enterprise. Because specific criminal charges under subsections (b)(1)(B) and (C) depend on this foundational determination, any developer publishing non-custodial tools faces an inherent, credible threat of indictment for failing to register with FinCEN.
Third, Lewellen highlights the Justice Department’s persistent refusal to formally disavow prosecution. Although government lawyers have asserted in court filings that the "mere creation and launching of software is not a crime," they have simultaneously maintained their underlying legal theory that publishing non-custodial cryptocurrency software without federal registration violates federal law. Because the DOJ has not explicitly conceded that non-custodial tools fall outside the statutory definition of money transmission, Lewellen retains a legitimate legal right to seek judicial protection before risking federal incarceration.
Finally, the brief directly attacks the legal weight assigned to the Blanche memorandum. Because the policy directive was issued after Lewellen filed his lawsuit, it cannot retroactively eliminate his legal standing. More importantly, the memorandum outlines discretionary enforcement priorities rather than altering the government’s official legal interpretation of the statute. Because the underlying statutory theory remains unchanged, the threat of prosecution persists regardless of shifting departmental priorities.
Legislative Stalemate and the Search for Regulatory Certainty
The urgency of Lewellen’s appeal is heavily compounded by legislative failures in Washington. Earlier congressional efforts, most notably the Blockchain Regulatory Certainty Act incorporated within broader legislative frameworks like the Clarity Act, sought to establish statutory safe harbors for developers of non-custodial blockchain technology.
However, policy analysts note that even previous iterations of the Blockchain Regulatory Certainty Act possessed significant limitations. Coin Center and other digital asset advocacy groups have pointed out that past legislative proposals primarily focused on administrative and regulatory compliance rather than shielding developers from aggressive federal criminal statutes. Specifically, while proposed protections might have addressed regulatory registration requirements under subsections (a) and (b) of Section 1960, they frequently left open potential liabilities under subsection (c), which federal prosecutors have routinely utilized in their high-profile indictments.
With comprehensive federal legislation stalled in Congress, the American judicial system remains the primary arena for defining the boundaries of innovation and criminal law in the digital age. Legal scholars observe that if the Fifth Circuit adopts the Justice Department’s expansive reading of the statute, it could effectively criminalize foundational software development across the United States.
Broader Implications for the American Technology Sector
The outcome of Lewellen v. Department of Justice carries profound ramifications for the broader software development and open-source communities. By conflating the distribution of neutral, non-custodial source code with the operation of a regulated financial institution, federal prosecutors risk creating an environment where foundational infrastructure development becomes legally untenable within U.S. borders.
Observers note that software code is traditionally protected as free speech under the First Amendment of the U.S. Constitution. Subjecting code publishers to federal racketeering and anti-money laundering statutes without evidence of illicit intent or direct asset custody threatens to drive blockchain engineering talent and capital toward more permissive international jurisdictions.
As the Fifth Circuit weighs the arguments presented in Lewellen’s reply brief, the tech and legal communities are watching closely. A favorable ruling would establish a vital precedent, affirming that software developers cannot be prosecuted as money transmitters simply for publishing tools that empower financial autonomy. Conversely, a ruling upholding the district court’s dismissal could cement an era of regulatory uncertainty, forcing developers to navigate an unpredictable prosecutorial landscape where writing code is treated as a federal crime. Coin Center and other civil liberties organizations continue to back Lewellen’s litigation, framing the battle not merely as a cryptocurrency dispute, but as a fundamental defense of technological innovation and constitutional rights in the digital era.
