Warrantless Search

Do You Have a Fourth Amendment Privacy Interest in Your Bitcoin Transactions?

No, the Fifth Circuit Court of Appeals recently held that people do not have a reasonable expectation of privacy in the information (1) contained on the Bitcoin blockchain and (2) that you provide to cryptocurrency exchanges.¹ The Court reached this decision through an analysis of the facts under the “third party doctrine” of Fourth Amendment jurisprudence. This doctrine is explained in further detail below.

Read full case HERE. US v. Gratkowski, 964 F.3d 307 (5th Cir. 2020).

First Off, what is Bitcoin?

Bitcoin is a “collection of concepts and technologies that form the basis of a digital money ecosystem.”² More colloquially, the word “bitcoin” refers to a bitcoin—a unit of digital currency used to store and transmit value among participants in the bitcoin network. Bitcoin derives its value not from physical characteristics like gold or trust in a central authority like fiat money. Instead, bitcoin is backed by the cryptographic technology behind it.

Bitcoin is powered by open-source code known as blockchain, which creates a shared public ledger that is viewable by anyone. Each transaction is a “block” that is “chained” to the code, creating a permanent record of each transaction. In order to transfer anything in this world, you need to be able to send and receive your items to and from a certain location. Bitcoin is no different. Like an email, Bitcoin is transferred between locations on the internet called Bitcoin addresses. A Bitcoin address indicates the source or destination of a Bitcoin payment. The Bitcoin blockchain contains only the sender’s address, the receiver’s address, and the amount of bitcoin transferred. Bitcoin wallets provide these addresses and utilize software that allows you to securely send, receive, and store bitcoin in the bitcoin network.

The central tenet behind the creation of Bitcoin was that willing parties should be able to transact directly with each other without the need for a trusted third party.³ A large part of the value in that kind of decentralization is in the privacy that it assumes will accompany the transaction. However, as the use and influence of cryptocurrencies expands, so too does the need of law enforcement to crack down on the illicit activities of crypto users that our society finds to be reprehensible. Analyzing the block chain for evidence of crimes involving bitcoin inevitably means that information of bitcoin transactions will be collected. This kind of forensic analysis, aside from collecting information on whether the bitcoin was used for something illegal, “can include the collection of large amounts of personal information about a user’s spending habits [and] total holdings[.]”⁴ The natural question for criminal law attorneys is whether a bitcoin user has a Fourth Amendment privacy interest in the information related to their bitcoin transactions.

Bitcoin Transactions and the 4th Amendment

The Fifth Circuit Court of Appeals in United States v. Gratkowski recently held that individuals do not have a Fourth Amendment privacy interest the information related to their bitcoin transactions.⁵ More specifically, the court found that there is no Fourth Amendment privacy interest in: (1) information on the bitcoin blockchain itself, and (2) bitcoin transactions in virtual currency exchanges.⁶

Gratkowski became the subject of a federal investigation when federal agents began investigating a child-pornography website. Users like Gratkowski paid the website bitcoin in exchange for downloadable child pornography. As mentioned above, the bitcoin blockchain only contains the sender’s address, the receiver’s address, and the amount of bitcoin transferred between the two parties. The identity of the owners do not appear on the bitcoin blockchain, but it is possible to discover the owner of a bitcoin address by analyzing the blockchain:

“For example, when an organization creates multiple Bitcoin addresses, it will often combine its Bitcoin addresses into a separate, central Bitcoin address (i.e., a “cluster”). It is possible to identify a “cluster” of Bitcoin addresses held by one organization by analyzing the Bitcoin blockchain’s transaction history. Open source tools and private software products can be used to analyze a transaction.”⁷

Federal agents used an outside service to analyze the publicly viewable bitcoin blockchain and identify a cluster of bitcoin addresses controlled by the website.⁸ They then served a grand jury subpoena on Coinbase (a prominent cryptocurrency exchange) for all information the exchange had on the Coinbase customers whose accounts sent Bitcoin to any of the addresses in the child-pornography website’s cluster. Coinbase turned over Gratkowski’s information, and federal agents obtained a warrant to search Gratkowski’s house. The agents found a hard drive containing child pornography and subsequently charged Gratkowski with one count of receiving child pornography and one count of accessing websites with intent to view child pornography.

At trial, Gratkowski moved to suppress the evidence the government obtained under the warrant, arguing that both the subpoena to Coinbase and the analysis done on the blockchain violated the Fourth Amendment. For the government to infringe upon an individual’s Fourth Amendment protection against unreasonable searches, the person must have a “reasonable expectation of privacy” in the items obtained.⁹ The “third-party doctrine” instructs that a person generally “has no legitimate expectation of privacy in information he voluntarily turns over to third parties.”¹⁰

For instance, the Supreme Court in United States v. Miller held that bank records were not subject to Fourth Amendment Protections.¹¹ The Court also held that telephone call logs were not subject to Fourth Amendment protections because the telephone numbers we dial are voluntarily conveyed to the phone company when we place a call.¹² However, the Supreme Court recently held that individuals do have a privacy interest in their cell phone location records, despite the records being held by a third party.¹³ In deciding this, the Court set-up the current framework under which courts are to determine whether the third-party doctrine applies to certain information that is shared with third parties: The sole act of sharing the information is no longer determinative as to whether we have a Fourth Amendment privacy interest in it. Rather, courts are to consider, “‘(1) the nature of the particular documents sought,’ which includes whether the sought information was limited and meant to be confidential, and (2) the voluntariness of the exposure.”¹⁴

The Fifth Circuit reasoned that the information on the Bitcoin blockchain is more similar to bank records and telephone call logs than to cell phone location records.¹⁵ The court held that the information contained on the Bitcoin blockchain (the amount of Bitcoin transferred and the Bitcoin addresses of the sender and receiver) is limited, and Bitcoin users are unlikely to expect that information to be kept private as it is well known that it is recorded on the publicly available blockchain.¹⁶ The court also reasoned that the public exposure of this information is voluntary because transferring and receiving Bitcoin requires an affirmative act by the Bitcoin address holder.¹⁷ The Fifth Circuit therefore held that there is no reasonable expectation of privacy in the information contained on the Bitcoin blockchain.¹⁸

The Court used similar reasoning regarding the question of privacy in the Bitcoin transactions on Coinbase. Coinbase is a financial institution like a bank. Both are subject to the Bank Secrecy Act as regulated financial institutions, and both keep records of customer identities and currency transactions. The Court held that, “[h]aving access to Coinbase records does not provide agents with ‘an intimate window into a person’s life’; it provides only information about a person’s virtual currency transactions.”¹⁹ The court also held that, “[s]econd, transacting Bitcoin through Coinbase or other virtual currency exchange institutions requires an ‘affirmative act on the part of the user[,]’ which speaks to the voluntariness with which the information was turned over to Coinbase.²⁰

Conclusion

The Gratkowski decision makes it difficult to imagine any situation in which a court would find there to be a Fourth Amendment privacy interest in information on the Bitcoin blockchain itself. Although Bitcoin users may truly value and believe in the privacy considerations contained in the monetary philosophy of Bitcoin, there is no getting around the fact that a “block” on the blockchain requires two Bitcoin addresses and the amount of bitcoin exchanged. And as long as private blockchain analytics companies continue to analyze only that information in determining the identity of Bitcoin users, courts will likely continue to find there to be no Fourth Amendment privacy interest in that information.

There appears to be more room to work with when it comes to cryptocurrency exchanges. Perhaps a court could find there to be a privacy interest in information given to an exchange whose business centers around user confidentiality. However, exchanges must comply with the same federal financial laws that govern Coinbase, and the record-keeping requirements under those laws would likely provide for a strong analogy to the Gratkowski case.

ENDNOTES:

1. United States v. Gratkowski, 964 F.3d 307 (5th Cir. 2020).
2. A. M. Antonopoulos, Mastering bitcoin: Programming the open blockchain (2nd ed.). Beijing etc.: O'Reilly.
3. Satoshi Nakamoto, Bitcoin: A Peer-to-Peer Electronic Cash System, https://bitcoin.org/bitcoin.pdf (2008).
4. Sasha Hodder & Rafael Yakobi, Bitcoin Fungibility, Mixing and the Legal Limits on Maintaining Privacy, https://bitcoinmagazine.com/culture/bitcoin-fungibility-mixing-and-the-legal-limits-on-maintaining-privacy (2020).
5. Gratkowski, 964 F.3d 307 (5th Cir. 2020).
6. Id.
7. Id. at 309.
8. Private blockchain analytics companies also provide services of this nature to cryptocurrency exchanges to help the exchanges meet their obligations under federal money laundering laws. See footnote 4 on the previous page for a discussion of privacy and these laws.
9. United States v. Jones, 565 U.S. 400, 406 (2012).
10. Smith v. Maryland, 442 U.S. 735, 743–44 (1979).
11. United States v. Miller, 425 U.S. 435, 439-40 (1976).
12. Smith v. Maryland, 442 U.S. 735, 743-44 (1979).
13. Carpenter v. United States, 138 S. Ct. 2206, 2217 (2018).
14. Gratkowski (quoting Carpenter, at 2219-20).
15. Id., at 311.
16. Id. at 312.
17. Id.
18. Id.
19. Id. (quoting Carpenter, at 2217).
20. Id. (quoting Carpenter, at 2220).

Officers Are Justified in Stopping Vehicles to Render Emergency Aid Making Evidence Found in the Process Fair Game

The Fifth Circuit Court of Appeals recently handed down an opinion dealing with the emergency-aid warrant exception and whether that exception extends to vehicular stops. The issue facing the court was whether a traffic stop of Appellant Toussaint to warn him that a gang member had ordered a hit on him was justified under the emergency aid exception to the Fourth Amendment. The court reversed the suppression order from the trial court holding that the emergency aid exception did justify the stop because this was a proper exigent circumstance.

US v. Toussaint (5th Circuit - 2016)

The Facts—Trial Court Found the Exigent Circumstances Had Expired

An FBI agent monitoring a wiretap overheard a suspected gang-member order his associate to kill Toussaint who could be found in a specific neighborhood driving a specific car, a silver Infiniti. Immediately the agent contacted a local police officer who met with several other officers to determine the plan to locate and warn Toussaint of the hit. The officers drive to the specified neighborhood and search for silver Infinities until they find one with an occupant leaving the neighborhood. The officers follow the vehicle, observe the driver, Toussaint, speeding and pull him over. Once pulled over Toussaint flees the officers on foot until he was caught and placed under arrest. During a search of Toussaint incident to arrest officers found a pistol and a bag of crack cocaine. The amount of time between the FBI agent overhearing the initial threat and Toussaint’s arrest was about 45 minutes.

Toussaint was charged with drug and firearm violations. Toussaint filed a motion to suppress the evidence obtained from the stop arguing that the stop was not justified. The trial court granted Toussaint’s motion to suppress finding that the exigency of the emergency had expired by the time the officers stopped Toussaint.

The Court of Appeals Reversed the Trial Courts Decision—Holding the Emergency-Aid Exception Applied in this Case and the Exigency Had Not Expired

The court held that the emergency-aid exception extends to vehicular stops when under the circumstances of the need to assist persons with serious injuries or threatened with serious injury. The emergency aid exception allows officers to conduct warrantless searches or seizures when there is a need to assist persons with serious injuries or threatened with a serious injury. Stuart, 547 U.S. 398 at 483. Under this exception, officers can enter areas they otherwise are not allowed in order to help someone. While the majority of such cases involve warrantless entries into homes, the court determined that there is no logical reason to not extend the exception to vehicular stops. Additionally, looking to reasonableness, “the ultimate touchstone of the Fourth Amendment,” the court stated “the benevolent act of trying to notify a driver that his life is in danger epitomizes reasonableness.” Thus, the court held that the emergency aid exception can be used to justify a traffic stop under proper exigent circumstances.

Then, the court held that the exception applied in this case and officers were justified in stopping Toussaint. The court stated that trial courts must examine objective facts of the circumstance in determining whether there was an objectively reasonable basis for believing exigency actually existed. The officers’ subjective motivations are never relevant in the determination. When the officers received what all parties agreed was a credible threat against Toussaint, who was located in a specific neighborhood and driving a specific vehicle, the court held it was reasonable for the officers to believe there was a serious threat on Toussaint’s life. Further, that exigency still existed at the time of the stop because the threat on Toussaint’s life had not ended within the 45 minutes it took officers to locate him and warn him. Since the stop was justified the search was proper and evidence was legally obtained because it would be contrary to the needs of law enforcement to force officers to ignore evidence found when they stop vehicles to render emergency aid.

In conclusion, the court held that the emergency aid exception extends to vehicular stops and that here, the stop of Toussaint was justified under this exception because there was a serious threat on his life. Accordingly, the court reversed the suppression order because the trial court was improper in granting the motion.

Is it a violation of one's Fourth Amendment rights against unreasonable warrantless search and seizure if an officer finds drugs in a vehicle through a nonconsensual search?  The United States Court of Appeals for the 5th Circuit said YES in United States v. Cotton.

U.S. v. Cotton- In February 2011, Appellant was driving his rental car when he was pulled over by a police officer who had received a tip that Appellant may be carrying drugs. The officer conducted a traffic stop and asked Appellant twice for consent to search his car. Appellant replied both times that the officer could search only his luggage. After searching through Appellant's luggage, the officer examined the driver side rear door, which had loose screws and tool marks. The officer pried back the door panel and discovered crack cocaine inside. The officer arrested Appellant who then made incriminating statements to the officer.

The 5th Circuit held that the officer impermissibly extended his search beyond the scope of the Appellant's consent and therefore violated the Appellant's Fourth Amendment right. According to the 5th Circuit, "when conducting a warrantless search of a vehicle based on consent, officers have no more authority to search than it appears was given by consent." Appellant's consent allowed the officer to only search luggage in areas of the car where luggage might be found. The officer exceeded the bounds of his limited consent when, instead of only searching the luggage, he searched the entire vehicle for drugs.

The 5th Circuit compared Cotton to U.S. v. Solis, which involved an officer who unexpectedly came across heroin during a consensual search of a defendant's bedroom. When the officer moved a cooler to use as a step, heroin was revealed. The defendant sought to suppress the evidence but the 5th Circuit held that because the cooler was moved only to effectuate the search for the gun, for which consent had been voluntarily given, the officer did not exceed the scope of the consent. Therefore, the heroin was admissible evidence.

However, in Cotton, after searching Appellant's luggage, the officer expanded his search by examining other parts of the car. The 5th Circuit held that because the officer did not have authority to search discrete locations where luggage would not likely be found, evidence of the crack cocaine must be suppressed as the officer violated Appellant's Fourth Amendment right.

If your 4th Amendment rights have been violated and you are facing criminal prosecution, give us a call for a free consultation.  Our attorneys will aggressively defend your rights against government intrusion.

Issue before the Court: "In the absence of exigent circumstances or consent, does Texas Transportation Code §724.012(b)(3)(B) violate the Texas and U.S. constitutional prohibitions against unreasonable searches and seizures where the statute requires law enforcement officers to seize a specimen of a DWI arrestee's blood without a search warrant in all cases where the officer believes the arrestee has been previously convicted of DWI two or more times?"

Sutherland v. State (2014)- On the night of February 2, 2011, Austin PD Officer Housmans initiated a traffic stop after a vehicle changed lanes without using a turn signal.  Once the vehicle had pulled over, Housmans approached the driver, appellant Sutherland, and, after speaking with him for "a bit," asked the appellant to step out of the vehicle.  Housmans administered field sobriety tests on appellant, and arrested appellant based on his performance on the tests and on his suspicion that the appellant was driving while intoxicated.  Appellant refused to provide a breath specimen. Dispatch provided Housmans with Texas DPS records showing that appellant had two or more previous convictions for DWI.  The appellant was then transported to the Travis County jail where, ultimately, a blood sample was drawn without appellant's consent and without a warrant.

Following the trial court's denial of a motion to suppress evidence of his intoxication, appellant pleaded guilty to the charges but reserved his right to appeal the trial court's ruling.  The appellant appealed his conviction for felony DWI.  The appellant challenged the constitutionality of the procedure and authority under which a sample of his blood was taken without his consent.  Appellant contends that the trial court erred by denying his motion to suppress the results of the testing done on the sample of his blood taken in such a manner.

Housmans claimed that he relied on the provision of the Texas Transportation Code that required him to obtain a sample of a suspect's blood whenever he learns that the individual has been convicted two or more times of DWI.  Appellant maintained that, regardless of the mandatory language of the Transportation Code, constitutional protections against unreasonable searches and seizures require that a warrantless search be supported by an established exception to the Fourth Amendment's warrant requirement, in this case, the exigent circumstances exception.  Appellant further contended that no established exception-exigent circumstances or otherwise - applied here.

According to the Seventh Court of Appeals- Amarillo, the arresting officer was not faced with exigent circumstances such that the natural dissipation of alcohol from appellant's bloodstream would support a warrantless seizure of a specimen of appellant's blood.  The arresting officer did not describe any factors that would suggest he was confronted with an emergency or any unusual delay in securing a warrant.  He testified that he made no effort to obtain a warrant because he believed that the law required that he obtain a blood sample under the circumstances presented to him.  The appellant was not transported to the hospital for medical care, the scene of the traffic stop was not very far from the booking facility, and transportation time was not a factor that could be said to lend to the exigency of the circumstances.  Furthermore, while the unavailability of a magistrate may affect whether an exigency exists to justify a warrantless blood draw, a magistrate is available twenty-four hours a day, every day at the Travis County central booking facility.  Therefore, based on these facts, the trial court erred by denying the defendant's motion to suppress.  Reversed and remanded.

Can police obtain consent from a co-tenant to conduct a warrantless search a dwelling after another co-tenant, who objected to the search, is lawfully removed?

The Supreme Court said YES in Fernandez v. California.  Read more below to see what happened and when the police can search a home without a warrant over a tenant's objection.

Fernandez v. California (2014) - Police officers observed a suspect in a violent robbery run into an apartment building, and heard screams coming from one of the apartments.  The officers knocked on the door and Roxanne Rojas answered.  She appeared to be battered and bleeding.  When the officers asked Rojas to step out so that they could conduct a search of the apartment, Fernandez came to the door and objected to the search.  Suspecting that he had assaulted Rojas, the officers removed Fernandez from the apartment and placed him under arrest. He was later identified as the perpetrator in the earlier robbery and taken to the police station. An officer later returned to the apartment and, after obtaining Rojas's oral and written consent and searched the premises where he found several items linking petitioner to the robbery.

At trial, Fernandez moved to suppress the evidence seized in the warrantless search.  The trial court denied Fernandez's motion to suppress the evidence, and he was convicted.  The California Court of Appeals affirmed the conviction.  It held that because Fernandez was not present when Rojas consented to the search, the exception to permissible warrantless consent searches of jointly occupied premises that arises when one of the occupants present objects to the search, Georgia v. Randolph, did not apply, and therefore, Fernandez's suppression motion had been properly denied.

In a 6-3 decision, the Supreme Court ruled that police officers may enter and search a home without a warrant as long as one occupant consents, even if another resident has previously objected.  Here, the Court said that Fernandez did not have a right to prevent the search of his apartment once Rojas had consented.  Although an officer usually needs a warrant from a judge to search a home, home searches are legal whenever the officers are able to obtain consent from an occupant.  According to the Court, "A warrantless consent search is reasonable and thus consistent with the 4th Amendment irrespective of the availability of a warrant." Furthermore, "Denying someone in Rojas' position the right to allow the police to enter her home would show disrespect for her independence." The judgment of the Court of Appeals was affirmed.