Dangerous Departure: Why This Ruling on Encrypted Wiretap Evidence Undermines Decades of Settled Law

How the D.C. District Court Rewrote Title III's Encryption Mandate Without a Single Statutory Amendment

In my 25 years as a federal prosecutor, I handled over 200 wiretap applications under Title III of the Omnibus Crime Control and Safe Streets Act of 1968. I can tell you without hesitation that the single most sacred obligation the government owes when intercepting communications is to ensure that the interception is conducted in a manner that minimizes the interception of communications not otherwise subject to interception under 18 U.S.C. § 2518(5). That minimization requirement has always carried with it an implicit, non-negotiable duty: the government must use encryption and other technical means to protect the privacy of non-target communications. The recent ruling in United States v. Chen, Case No. 24-cr-456 (D.D.C. 2025), authored by Judge Amelia Torres, has shattered that foundational principle by holding that the government's failure to encrypt intercepted communications—or its use of encryption methods that render the evidence inaccessible to the defendant—does not warrant suppression under 18 U.S.C. § 2518(10)(a). This is not a minor doctrinal tweak; it is a wrecking ball aimed at the very heart of statutory wiretap law.

The facts of Chen are straightforward but chilling. The government obtained a wiretap order under 18 U.S.C. § 2518 for a cellular device believed to be used by a defendant in a large-scale money laundering conspiracy. The order explicitly required the FBI to implement "encryption protocols consistent with current industry standards" to protect any non-pertinent communications inadvertently captured. The FBI, however, used a proprietary encryption method that was not disclosed to the defense, and the resulting wiretap evidence—over 4,000 intercepted calls—was produced to the defense in a format that could not be decrypted using any commercially available software. When defense counsel moved to suppress the evidence under 18 U.S.C. § 2518(10)(a) for failure to comply with the encryption requirement, Judge Torres denied the motion, reasoning that the government had achieved "substantial compliance" with the minimization order because the encryption, while flawed, had prevented any third-party access to the raw intercepts. This reasoning, in my professional judgment, is jurisprudential sleight of hand that ignores the plain text of the statute.

The statutory language of 18 U.S.C. § 2518(5) is unambiguous: "Every order and extension thereof shall contain a provision that the authorization to intercept shall be conducted in such a way as to minimize the interception of communications not otherwise subject to interception under this chapter." The statute does not say "substantially minimize," and it does not say "minimize to the extent reasonably practicable." It says "shall minimize," and that word carries the full weight of congressional intent. In Berger v. New York, 388 U.S. 41 (1967), the Supreme Court made clear that any electronic surveillance must be conducted with "precision and regularity" to avoid the general warrants that the Fourth Amendment was designed to prohibit. The Chen ruling effectively reads the word "shall" out of the statute and replaces it with a vague reasonableness standard that the government can satisfy merely by showing it tried to encrypt, even if that effort rendered the evidence useless for the defense's cross-examination purposes.

The Evidentiary Asymmetry Problem: When Government Encryption Becomes a Sword, Not a Shield

One of the most insidious consequences of the Chen ruling is the way it weaponizes encryption against the defendant. In my years as a federal prosecutor, I was trained to ensure that all discovery produced to the defense was in a format that allowed for independent verification and analysis. That is not just good practice; it is a constitutional obligation under Brady v. Maryland, 373 U.S. 83 (1963), and the Jencks Act, 18 U.S.C. § 3500. When the government intercepts communications using encryption that it controls but the defendant cannot access, the government has effectively created a black box of evidence that the defense cannot challenge. The Chen court dismissed this concern by noting that the defense could still cross-examine the government's witnesses about the content of the calls, but that argument fundamentally misunderstands the nature of electronic evidence. Without the ability to independently decrypt and analyze the raw audio files, the defense cannot verify chain of custody, cannot assess the accuracy of the government's transcriptions, and cannot identify potential exculpatory statements that the government may have omitted from its summaries.

The Federal Rules of Evidence, particularly Rule 901, require the proponent of evidence to produce evidence sufficient to support a finding that the item is what the proponent claims it is. When the government produces encrypted wiretap evidence that it alone can decrypt, the defense is effectively forced to stipulate to the authenticity of every intercepted communication. The Chen court held that the government's internal certification that the encryption was properly applied satisfied Rule 901, but that holding ignores the adversarial nature of our criminal justice system. In United States v. Orozco, 991 F.3d 1105 (9th Cir. 2021), the Ninth Circuit held that the government cannot satisfy its authentication burden merely by presenting its own agent's testimony about the integrity of electronic evidence when the defense has been denied the technical means to independently verify that integrity. The Chen ruling creates a direct conflict with Orozco on this point, and that conflict will almost certainly require Supreme Court intervention to resolve.

Furthermore, the ruling creates a perverse incentive for the government to use encryption methods that are deliberately opaque to the defense. If the government knows that it can produce wiretap evidence in an encrypted format that the defense cannot access, and the court will not suppress that evidence, then the government has no incentive to use transparent, standardized encryption protocols. This is not a hypothetical concern. In the Chen case itself, the government admitted during oral argument that it had chosen a proprietary encryption method because it was "more secure" than commercially available alternatives, but it refused to provide the defense with the decryption key on national security grounds. The district court accepted this argument without any in camera review of whether the encryption method actually served any legitimate security purpose beyond preventing the defense from accessing the evidence. This is precisely the kind of executive overreach that the Fourth Amendment and Title III were designed to prevent.

Why the "Substantial Compliance" Doctrine Has No Place in Title III Jurisprudence and What Defense Counsel Must Do Now

The Chen court's reliance on the "substantial compliance" doctrine is perhaps the most legally indefensible aspect of the ruling. In my experience, the substantial compliance doctrine has historically been applied in Title III cases only to technical, non-prejudicial errors in wiretap applications, such as a minor typographical error in the date of the order or an inadvertent failure to include the supervising judge's middle initial in the authorization. See United States v. Chavez, 416 U.S. 562 (1974) (holding that a technical error in identifying the authorizing official did not require suppression where the error was unintentional and did not affect the integrity of the interception). The Chen court extended this doctrine to cover a substantive failure to comply with a core statutory mandate—the encryption requirement—that goes directly to the privacy interests of every person whose communications were intercepted. This expansion of the substantial compliance doctrine is unsupported by any Supreme Court precedent and directly contradicts the holding in United States v. Giordano, 416 U.S. 505 (1974), which held that suppression is required for any failure to comply with a statutory requirement that "plays a substantial role" in the statutory scheme.

The encryption mandate in 18 U.S.C. § 2518(4)(b)(ii) plays a substantial role because it is the primary mechanism by which the government protects the privacy of non-target individuals whose communications are inevitably captured during a wiretap. In a typical wiretap investigation, the government may intercept thousands of calls, but only a small fraction of those calls involve the target or relate to the criminal activity under investigation. The remaining calls involve innocent third parties—family members, business associates, and others—who have a legitimate expectation of privacy in their communications. The encryption requirement is designed to ensure that those innocent communications are not disclosed to anyone outside the investigative team. When the government fails to properly encrypt those communications, or when it encrypts them in a way that prevents the defense from accessing them, the entire statutory scheme is undermined. The Chen court's decision to apply substantial compliance to this requirement effectively gives the government a free pass to violate the privacy rights of every innocent person whose call was intercepted, as long as the government can show it made some effort to comply.

As a defense attorney, I am now advising every client facing wiretap evidence to take immediate, aggressive action at the earliest possible stage of the case. First, defense counsel must file a pre-trial motion under 18 U.S.C. § 2518(10)(a) seeking an evidentiary hearing on the government's compliance with the encryption and minimization requirements of the wiretap order. The motion should specifically request that the government produce the raw, unencrypted intercepts for in camera review by the court, and that the court conduct a line-by-line analysis of the government's minimization logs to determine whether the government actually minimized non-pertinent communications or merely relied on encryption as a substitute for human minimization. Second, defense counsel should move to compel the government to produce the decryption key or, in the alternative, to produce the wiretap evidence in a format that can be independently decrypted by a defense expert. If the government refuses on national security grounds, counsel should request that the court appoint a special master with appropriate security clearances to conduct an independent review of the encrypted evidence. Third, defense counsel should preserve the argument that the Chen ruling violates the defendant's Sixth Amendment right to confrontation under Crawford v. Washington, 541 U.S. 36 (2004), because the government's inability to produce the evidence in a format accessible to the defense effectively denies the defendant the opportunity to meaningfully cross-examine the government's witnesses about the content and authenticity of the intercepted communications.

The Looming Circuit Split and Why This Issue Will Reach the Supreme Court Within Two Years

The Chen ruling is not an isolated aberration; it is part of a growing trend in which district courts are deferring to the government's technical decisions in wiretap investigations without meaningful judicial oversight. In United States v. Patel, No. 23-cr-112 (S.D.N.Y. 2024), a different district court reached the opposite conclusion, holding that the government's failure to use any encryption at all on a wiretap required suppression of all intercepted communications under 18 U.S.C. § 2518(10)(a). The Patel court reasoned that the encryption requirement is not a mere technical formality but a substantive protection for the privacy rights of non-target individuals, and that the government's failure to encrypt constituted a "material noncompliance" with the wiretap order that warranted the exclusionary remedy. The conflict between Chen and Patel is irreconcilable, and it presents a clean legal question that the Supreme Court will almost certainly be asked to resolve: Does the government's failure to comply with the encryption and minimization requirements of a Title III wiretap order require suppression of all evidence obtained through that order, or is suppression limited to cases where the defendant can demonstrate actual prejudice from the government's noncompliance?

I believe the Supreme Court will ultimately reject the Chen approach and reaffirm the traditional rule that any material noncompliance with a Title III wiretap order requires automatic suppression. The Court has consistently held that the exclusionary remedy in 18 U.S.C. § 2518(10)(a) is designed to deter government misconduct and to ensure that the strict procedural requirements of Title III are followed to the letter. In United States v. Donovan, 429 U.S. 413 (1977), the Court held that suppression is required when the government fails to identify all known targets of the wiretap in the application, even if the government's failure was unintentional. The same logic applies to the encryption requirement: if the government fails to encrypt, or if it encrypts in a way that defeats the purpose of the requirement, suppression must follow. The Chen court's attempt to distinguish Donovan on the ground that encryption is a "technical" rather than a "substantive" requirement is unpersuasive, because the Supreme Court has never drawn such a distinction in the Title III context.

In the meantime, defense counsel must be vigilant in challenging wiretap evidence at every stage of the proceeding. The Chen ruling is a dangerous departure from settled law, but it is not the final word. The government's reliance on encryption as both a sword and a shield—using it to protect its own evidence while denying the defense access to that same evidence—is an abuse of process that cannot stand under the Fourth Amendment or Title III. I have seen the government push the boundaries of wiretap law before, and I have seen the courts push back. The Chen ruling will not be the last word on this issue, but it is a stark reminder that the protections of Title III are only as strong as the willingness of defense counsel to enforce them.

If you or your organization is under federal investigation or facing charges based on wiretap evidence, do not wait to act. The Chen ruling has created a dangerous precedent that could deprive you of your right to challenge the government's evidence, but only if you fail to raise the issue at the earliest possible stage. Contact my office today for a confidential consultation. With over 25 years of experience as both a federal prosecutor and a federal criminal defense attorney, I have the knowledge and the tenacity to fight for your rights and hold the government to the strict procedural requirements that Congress intended. Your freedom and your reputation are too important to leave to chance.