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Constitutional Law

Aug. 13, 2026

Geofence warrants after Chatrie: new limits, same old constitutional duty

The Supreme Court's decision in Chatrie v. United States holds that geofence warrants seeking Google location data constitute Fourth Amendment searches, requiring California law enforcement to satisfy probable cause and particularity when using the increasingly common investigative tool.

William M. Paparian

Email: bpaparian@aol.com

Southwestern Univ SOL; Los Angeles CA

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Geofence warrants after Chatrie: new limits, same old constitutional duty
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When traditional leads dried up in the investigation of a 2019 armed robbery at a federal credit union outside Richmond, detectives turned to a tool law enforcement agencies have increasingly relied on in recent years: Google.

They got a geofence warrant for Location History data covering every phone near the bank for about an hour. One of those phones belonged to Okello Chatrie. That data helped ID him, and the rest is history: arrest, con...

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