As virtually anyone in the U.S. understands, smartphones hold vast amounts of personal information—messages, photos, emails, location data and more. As a result, anyone who is under arrest may not be eager to turn over this wealth of personal information to law enforcement.
Must people under arrest unlock their phones for the police in California? The answer to this question is complex, as this topic sits at the intersection of constitutional rights, privacy protections and evolving technology.
Sometimes yes, sometimes not so much
The Fifth Amendment to the U.S. Constitution protects individuals from being compelled to incriminate themselves. Courts have generally held that forcing someone to disclose a passcode or provide verbal information that reveals the contents of their mind can violate this right. In other words, being ordered to state or enter a password may be seen as testimonial evidence, which the Constitution protects against.
However, biometric unlocking, such as using a fingerprint or facial recognition, is treated differently in some courts. Law enforcement, in certain cases, has been allowed to compel suspects to use their physical traits to unlock a phone. Courts reason that, unlike a password, which requires disclosing knowledge, a fingerprint or facial scan is more like providing a key or DNA sample. This distinction is a gray area that continues to spark legal debate, however. As a result, defendants who have essentially been forced to turn over evidence in this way may have grounds to push back against any related evidence submitted in court.
In California, the California Electronic Communications Privacy Act (CalECPA) requires police to obtain a search warrant before accessing the contents of a phone or other electronic device, except in specific emergencies. Even with a warrant, however, questions about compelled unlocking remain unsettled and often require case-by-case analysis.
For individuals under arrest, this means they may have the right to refuse to provide a passcode, though police could still attempt to access their device by other means. If biometric unlocking is involved, the outcome of the situation at hand may depend on how courts interpret the situation and whether a warrant is in place.
Because the law is still developing in this area, anyone facing arrest or investigation should exercise their right to remain silent and request an attorney immediately. This will give defendants navigating any particular set of circumstances the best chance possible of avoiding a negative outcome.
