Supreme Court Rules Cellphone Location History Needs a Warrant

*Police must now show probable cause before obtaining detailed location data from Apple, Google, or similar companies through geofence warrants.*

In a 6-3 decision, the Supreme Court held that obtaining a person’s detailed cellphone location history from a tech company constitutes a Fourth Amendment search, even when the data covers only a short period. The ruling directly limits the use of geofence warrants that previously allowed law enforcement to sweep large areas of stored location records without individualized suspicion.

Context

Geofence warrants have let police request location data from Apple and Google for every device present inside a defined geographic area during a given time window. The practice produced broad dragnets that could implicate dozens or hundreds of people while targeting a single suspect. Until this decision, companies often complied with such subpoenas under the third-party doctrine, which treated records held by service providers as carrying reduced privacy protections.

Detail

The Court determined that a geofence warrant meets the definition of a search under the Fourth Amendment. Officers must therefore demonstrate probable cause before a judge will approve access to the data. The opinion applies regardless of how brief the requested window is, provided the records reveal detailed movement history.

Both Apple and Google maintain extensive location databases tied to user accounts. The ruling removes the prior option for law enforcement to obtain that information through less rigorous legal process.

Why it matters

The decision raises the bar for access to the precise movement records that Apple and Google already hold. Law enforcement agencies will now need to clear a higher evidentiary threshold before they can use location dragnets, which will slow some investigations and reduce the volume of innocent users swept into warrants. For the companies, compliance obligations shift from responding to subpoenas to requiring warrants supported by probable cause. The practical effect is narrower data access for police and stronger default protection for stored location histories.

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Sources:

• 9to5Mac
• AppleInsider

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