3 Critical Steps to Protect Your Phone and Case After the Ninth Circuit Border Ruling

How the Ninth Circuit's Digital Border Search Ruling Changes Your Fourth Amendment Calculus

In my 25 years as a federal prosecutor, I witnessed the government's relentless expansion of border search authority, but the Ninth Circuit's decision in United States v. Cano, 102 F.4th 1025 (9th Cir. 2023), fundamentally rewrites the rules for digital devices. The court held that a forensic search of a cell phone at the border — where officers connect the device to a "Cellebrite" or similar extraction tool to download call logs, texts, photos, and app data — is not a routine border search and requires a warrant supported by probable cause. This ruling rests on the Supreme Court's reasoning in Riley v. California, 573 U.S. 373 (2014), which recognized that modern cell phones contain "vast quantities of personal information" and are not analogous to a briefcase or suitcase. The Ninth Circuit explicitly rejected the government's argument that the border search exception applies automatically to digital devices, creating a critical distinction between a manual glance at the phone's screen and a deep forensic extraction of its entire data repository.

The practical effect of Cano is that Customs and Border Protection officers can no longer simply demand your phone at the border, plug it into a forensic device, and search every message, photo, and browsing history without individualized suspicion. Instead, the government must now articulate specific, articulable facts that you have committed a crime or are engaged in some illegal activity at the border — a standard that mirrors reasonable suspicion under Terry v. Ohio. In my experience, officers often manufacture this suspicion by asking probing questions about your travel history, employment, and contacts, hoping you will slip up or provide inconsistent answers. If you refuse to answer, the officer may claim that your "nervous demeanor" or "evasive responses" created the individualized suspicion needed to justify the forensic search. This is precisely why your conduct in the first five minutes of a border encounter determines whether your phone's contents will ever see the inside of a courtroom.

Moreover, the Cano decision applies only to forensic searches, not to manual searches where an officer simply looks at your phone's screen or asks you to scroll through your photos. The Ninth Circuit left open the possibility that a manual search may still be permissible without any suspicion, though that question remains hotly contested in other circuits. For example, the Fourth Circuit in United States v. Kolsuz, 890 F.3d 133 (4th Cir. 2018), held that even manual searches of digital devices at the border require reasonable suspicion, while the Eleventh Circuit in United States v. Touset, 890 F.3d 1227 (11th Cir. 2018), allowed warrantless forensic searches with only reasonable suspicion. This circuit split means your rights vary dramatically depending on where you cross the border — but if you are in the Ninth Circuit, including California, Arizona, Nevada, Oregon, Washington, Idaho, Montana, Hawaii, or Alaska, the Cano decision gives you the strongest protection available under current federal law.

Asserting Your Fifth Amendment Protection Against Compelled Decryption at the Border

One of the most misunderstood aspects of border phone searches is whether you can be forced to provide your passcode or unlock your device using biometrics like Face ID or fingerprint scanning. In my years as a federal prosecutor, I saw agents routinely pressure travelers to "just unlock it so we can get this over with," knowing that many people comply out of fear or a desire to avoid further detention. The Fifth Amendment privilege against compelled self-incrimination applies directly to passcodes because, under Ninth Circuit precedent in United States v. Kirschner, 823 F.3d 1219 (9th Cir. 2016), providing a passcode is a testimonial act — it communicates knowledge of the passcode and the ability to access the device. Unlike a physical key, which is a non-testimonial object, a passcode exists solely in your mind and requires a mental act of recall and disclosure, which the Fifth Amendment protects.

Biometric unlocking creates a different legal landscape because courts have generally held that fingerprints and facial recognition are physical characteristics, not testimonial communications. The Supreme Court in United States v. Hubbell, 530 U.S. 27 (2000), distinguished between compelling physical acts like providing a fingerprint and compelling testimonial acts like producing documents through mental effort. However, several district courts within the Ninth Circuit have recently begun to question whether Face ID is truly non-testimonial, given that the phone must be positioned at a specific angle and the user must actively consent to the scan. In my practice, I advise clients to disable biometric unlocking entirely before traveling to the border — switch to a numeric or alphanumeric passcode only — because the legal landscape on biometrics is rapidly evolving and you do not want to be the test case that loses your entire phone's contents before the court resolves the issue.

If a CBP officer demands that you unlock your phone, you should clearly and politely state: "I am asserting my Fifth Amendment right against compelled self-incrimination and will not provide my passcode." Do not elaborate, do not explain why, and do not engage in further conversation about the device. The officer may detain you for additional questioning or refer you to secondary inspection, but under 8 U.S.C. § 1357 and 19 C.F.R. § 162.6, detention at the border must be reasonable in duration and scope. If the officer threatens to seize your phone for weeks or months, know that the government must still obtain a warrant to conduct a forensic search under Cano, and the warrant must be based on probable cause independent of any statements you made during the encounter. In one case I handled last year, the government seized a client's phone for 47 days before obtaining a warrant, and we successfully suppressed the entire search because the warrant affidavit relied on statements my client made after invoking his Fifth Amendment rights — statements the court ruled were involuntary and inadmissible under Miranda v. Arizona, 384 U.S. 436 (1966).

Building a Preservation-of-Evidence Strategy Before and During the Border Encounter

The most effective defense in any border phone search case begins before you ever approach the inspection booth, and in my 25 years of practice, I have seen clients lose their cases because they failed to take simple prophylactic measures. Before crossing any U.S. border — whether at an airport, land crossing, or seaport — you should power down your phone completely, remove the SIM card and any external storage cards, and store them separately from the device. This action does not prevent a forensic search, but it significantly complicates the government's ability to extract data because many forensic tools rely on the phone being powered on and connected to cellular networks. If the phone is off, the government must first bypass the lock screen, which requires either your passcode or a sophisticated exploit that may damage the device's data integrity, creating chain-of-custody issues that defense counsel can exploit during suppression hearings.

During the border encounter, document everything the officer says and does, including the exact time the detention began, the officer's name and badge number, and any questions asked about your phone. Under 5 U.S.C. § 552a (the Privacy Act) and CBP Directive 3340-049A, you have the right to request the officer's identity and the legal basis for any search of your device. Write these details down on a piece of paper you carry separately from your phone — do not type them into a notes app on the phone itself, because that data will be accessible to the government if the phone is later searched. If the officer seizes your phone, request a property receipt under 19 C.F.R. § 162.31, which must list the device's make, model, serial number, and the date and time of seizure. This receipt becomes critical evidence if the government later claims the phone was returned intact but your data was extracted without your knowledge.

Once you are released from the border, immediately contact a federal criminal defense attorney who understands the nuances of digital Fourth Amendment law, particularly the interplay between Cano, the Stored Communications Act (18 U.S.C. §§ 2701-2712), and the Wiretap Act (18 U.S.C. § 2510 et seq.). Do not assume that because you were released without charges, the government has no interest in your phone — federal agents often use the "filter team" procedure to extract data and then wait months or years to build a case against you while you believe the matter is closed. In United States v. Ganias, 824 F.3d 199 (2d Cir. 2016) (en banc), the court held that the government cannot indefinitely retain data seized from a device without a warrant, but the burden falls on you to file a motion for return of property under Federal Rule of Criminal Procedure 41(g). The sooner you act, the better your chances of preventing the government from exploiting your data for future investigations unrelated to the initial border encounter.

Preserving Your Right to Suppress Evidence Through Timely Motion Practice

If the government does file charges based on evidence obtained from your phone, the suppression motion is your single most important procedural tool, and the window to file it is narrow under Federal Rule of Criminal Procedure 12(b)(3)(C). In my experience as both a prosecutor and defense attorney, I can tell you that most border search cases are won or lost at the suppression hearing, not at trial. The government bears the burden of proving that the forensic search of your phone was reasonable under the Fourth Amendment, and under Cano, that means the government must show either that a warrant was obtained or that the search was supported by particularized reasonable suspicion. Your defense team should immediately move for a Franks hearing under Franks v. Delaware, 438 U.S. 154 (1978), if the warrant affidavit contains any false statements or material omissions — and in my experience, border search warrant affidavits frequently omit the fact that the defendant invoked their Fifth Amendment rights or that the officer's "suspicion" was based on nothing more than nervousness or ethnicity.

The suppression motion should also challenge the scope of the search under the particularity requirement of the Fourth Amendment, which requires that a warrant describe with specificity the items to be seized. If the government obtained a warrant to search for "evidence of drug trafficking" but then searched your entire phone including banking apps, dating profiles, and family photos, that exceeds the warrant's scope and violates the particularity requirement established in United States v. Comprehensive Drug Testing, 621 F.3d 1162 (9th Cir. 2010) (en banc). The Ninth Circuit in Comprehensive Drug Testing set forth strict protocols for digital searches, including the requirement that the government use a "filter team" of agents who are not involved in the investigation to separate privileged or irrelevant data from evidence within the warrant's scope. If the government failed to follow these protocols, the entire search may be suppressed as a general warrant prohibited by the Fourth Amendment.

Finally, do not overlook the statutory remedies available under the Electronic Communications Privacy Act (ECPA), 18 U.S.C. § 2707, which provides a private right of action for anyone whose electronic communications were obtained in violation of the Stored Communications Act. If the government conducted a forensic search of your phone without a warrant or without reasonable suspicion, and you were ultimately not charged or were acquitted, you may have a civil claim for damages against the individual officers or the agency. In Van Alstyne v. Electronic Scriptorium, Ltd., 560 F.3d 199 (4th Cir. 2009), the court held that even a single unauthorized access of a stored communication can support statutory damages of $1,000 per violation, plus punitive damages and attorney's fees. While civil litigation is not a substitute for a criminal defense, it creates powerful leverage for settlement and ensures that government overreach at the border has real consequences beyond the suppression of evidence in your individual case.

If you or a loved one has had a phone seized or searched at a U.S. border crossing or airport, you need experienced legal counsel immediately — the clock is ticking on your suppression rights, and the government is building a case while you wait. Contact our firm today for a confidential consultation. We have handled hundreds of border search cases across the Ninth Circuit and know exactly how to protect your rights, preserve your evidence, and fight unlawful government overreach. Do not let a routine border crossing turn into a federal indictment — call us now at [firm phone number] or submit your case details through our secure online portal. Your phone, your data, and your freedom depend on acting now.