Protect your phone passcodes — Suspects can refuse to provide phone passcodes to police, court rules Phone-unlocking case law is “total mess,” may be ripe for Supreme Court review.

Jon Brodkin – Dec 14, 2023 11:30 pm UTC EnlargeGetty Images | releon8211 reader comments 76

Criminal suspects can refuse to provide phone passcodes to police under the US Constitution’s Fifth Amendment privilege against self-incrimination, according to a unanimous ruling issued today by Utah’s state Supreme Court. The questions addressed in the ruling could eventually be taken up by the US Supreme Court, whether through review of this case or a similar one.

The case involves Alfonso Valdez, who was arrested for kidnapping and assaulting his ex-girlfriend. Police officers obtained a search warrant for the contents of Valdez’s phone but couldn’t crack his passcode.

Valdez refused to provide his passcode to a police detective. At his trial, the state “elicited testimony from the detective about Valdez’s refusal to provide his passcode when asked,” today’s ruling said. “And during closing arguments, the State argued in rebuttal that Valdez’s refusal and the resulting lack of evidence from his cell phone undermined the veracity of one of his defenses. The jury convicted Valdez.”

A court of appeals reversed the conviction, agreeing “with Valdez that he had a right under the Fifth Amendment to the United States Constitution to refuse to provide his passcode, and that the State violated that right when it used his refusal against him at trial.” The Utah Supreme Court affirmed the court of appeals ruling.
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The ruling offered some commentary on the developing legal questions about device passcodes:

The prevalence of passcodes that encrypt the information on electronic deviceswhich are often seized by law enforcement while investigating criminal conducthas raised important questions about how the Fifth Amendment extends to law enforcement’s efforts to unlock these devices and decrypt the contents inside. These questions have proven to be especially complex where law enforcement attempts to access the contents of a seized device by means that do not require the suspect to disclose the actual passcodelike, for example, obtaining an order to compel the suspect to provide an unlocked device.

The Valdez case does not involve an order to compel a suspect to unlock a device. Instead, “law enforcement asked Valdez to verbally provide his passcode,” Utah justices wrote. “While these circumstances involve modern technology in a scenario that the Supreme Court has not yet addressed, we conclude that these facts present a more straightforward question that is answered by settled Fifth Amendment principles.”

Ruling against the state, the Utah Supreme Court said it “agree[s] with the court of appeals that verbally providing a cell phone passcode is a testimonial communication under the Fifth Amendment.”

Berkeley Law Professor Orin Kerr wrote today that the case could head to the US Supreme Court. “One of the major issues in the law of digital evidence investigations is how the Fifth Amendment privilege against self-incrimination applies to unlocking phones,” Kerr wrote.

So far, “the lower court case law is a total mess,” according to Kerr. “No one can say what the law is. And I’ve been waiting for a case to come down that might be a good candidate for US Supreme Court review to clear up the mess.” Page: 1 2 Next → reader comments 76 Jon Brodkin Jon has been a reporter for Ars Technica since 2011 and covers a wide array of telecom and tech policy topics. Jon graduated from Boston University with a degree in journalism and has been a full-time journalist for over 20 years. Advertisement Channel Ars Technica ← Previous story Next story → Related Stories Today on Ars

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