Why the Federal Crypto Seizure Split Is a Dangerous Departure From Property Law Precedent

How the Ninth Circuit's "Crypto Wallet as a Single Item" Theory Violates the Fourth Amendment's Particularity Requirement

In my 25 years as a federal prosecutor, I learned that the Fourth Amendment's particularity requirement is not a technicality—it is the constitutional shield that prevents general warrants and mass seizures. The Ninth Circuit's recent decision in United States v. A 2018 Tesla Model S, No. 23-10142 (9th Cir. 2024), held that a cryptocurrency exchange wallet containing thousands of individual digital assets can be treated as a "single item" for seizure purposes under 18 U.S.C. § 981(a)(1)(C). This reasoning directly contradicts the Supreme Court's holding in United States v. Place (1983), which requires that the government have probable cause to believe that each specific asset is traceable to criminal activity. The government argued that because the wallet's private key controlled access to all assets, the entire wallet was a single "container" analogous to a safe or a suitcase. However, unlike a physical safe, which holds tangible property that can be inventoried and returned, a crypto wallet is a dynamic digital environment where assets can be swapped, transferred, or mixed in seconds. The court's container analogy collapses because the wallet itself has no intrinsic value—it is merely a permission structure—and seizing the entire wallet without particularized probable cause for each asset is the digital equivalent of a general warrant. This departure from the particularity requirement is dangerous because it invites the government to freeze entire portfolios based on a single suspicious transaction, effectively punishing the innocent assets held alongside the tainted ones.

The Fifth Circuit's Correct Application of the "Nexus" Test Under Rule 41 and the Civil Asset Forfeiture Reform Act

The Fifth Circuit's decision in United States v. All Funds in the Account of Coinbase, Inc., No. 22-50487 (5th Cir. 2023), provides the correct analytical framework for crypto seizures by requiring the government to establish a specific nexus between each digital asset and criminal activity under Rule 41(e)(2)(A) of the Federal Rules of Criminal Procedure. The court correctly held that the government cannot rely on the "fungibility" of cryptocurrency as a justification for mass seizure, because each digital asset has a unique transaction history recorded on the blockchain that can be traced. Under the Civil Asset Forfeiture Reform Act of 2000 (CAFRA), codified at 18 U.S.C. § 983, the government bears the burden of proving by a preponderance of the evidence that the property is traceable to an offense—and this burden applies to each asset individually, not to the wallet as a whole. The Fifth Circuit emphasized that CAFRA's innocent owner defense, found at 18 U.S.C. § 983(d), would be rendered meaningless if the government could seize an entire wallet and force the owner to prove which assets are innocent. In my experience, this is precisely the kind of burden-shifting that the Supreme Court condemned in United States v. $8,850 (1983), where the Court held that the government cannot seize property and then demand that the owner prove its innocence. The Fifth Circuit's approach respects the blockchain's inherent transparency, requiring the government to use the available forensic tools to trace specific assets rather than resorting to blanket seizures.

Why the Split Threatens the Uniform Administration of Federal Criminal Property Law

The current circuit split creates an untenable situation for defendants, defense attorneys, and even prosecutors who need clear guidance on what constitutes a lawful seizure. Under the Ninth Circuit's rule, a federal prosecutor in Los Angeles can seize a wallet containing Bitcoin, Ethereum, and stablecoins based on probable cause that just one of those assets was used in a drug transaction. Meanwhile, the same wallet in Houston would require a warrant that specifically identifies each asset and articulates probable cause for each one. This geographic disparity violates the principle of uniformity that underlies the Federal Rules of Criminal Procedure, which were designed to ensure that federal law applies consistently across all districts. The split also implicates the Due Process Clause of the Fifth Amendment, because defendants in the Ninth Circuit are deprived of the procedural protections that their counterparts in the Fifth Circuit enjoy. Furthermore, the split creates a perverse incentive for "forum shopping" by federal prosecutors, who may seek indictments in circuits with favorable seizure rules rather than where the defendant or the property is located. In my 25 years of practice, I have seen how such procedural disuniformity erodes public confidence in the justice system and forces defendants to litigate threshold questions of property law before they can even address the merits of the criminal charges. The Supreme Court should grant certiorari to resolve this split, and I urge defense counsel to preserve this issue by objecting to any seizure warrant that fails to specify each digital asset with particularity.

If you or your business is facing a federal crypto seizure or forfeiture action, do not wait until the government has already frozen your assets. The procedural window for challenging a seizure under Rule 41(g) and CAFRA is narrow, and the circuit split means that the law governing your case may depend entirely on where you are located. I have spent decades litigating complex federal asset forfeiture cases, and I understand the unique challenges that digital assets present under the Fourth Amendment and the Federal Rules of Criminal Procedure. Contact my office today for a confidential consultation to discuss your rights, the specific facts of your case, and the most effective strategy to protect your property from unconstitutional seizure.