The U.S. Supreme Court heard arguments on Monday in a significant legal case potentially reshaping digital privacy rights in the U.S.
The case, Chatrie v. United States, addresses the government’s use of “geofence” search warrants. These warrants allow law enforcement to require tech companies like Google to reveal which users were in a specific location at a particular time based on their phones’ location data.
Investigators use these warrants to identify who was at a crime scene, akin to locating a suspect in a vast digital pool.
Civil liberties groups argue that geofence warrants are overly broad and unconstitutional, often implicating innocent individuals who were simply nearby. They have been used to collect data beyond intended limits and identify people at protests.
The use of geofence warrants has increased, with a New York Times investigation noting their use by federal agents since 2016. Thousands of these warrants are filed annually, drawing attention to their legality and how they affect privacy expectations.
Chatrie is a significant Fourth Amendment case for the Supreme Court, possibly impacting whether geofence warrants are permissible. The decision will weigh individuals’ reasonable expectation of privacy over corporate collection of location data.
The justices’ decision is pending, but the arguments presented could hint at the eventual verdict.
‘Search first and develop suspicions later’
The case concerns Okello Chatrie, a Virginia man convicted for robbing a bank in 2019 after investigators used a geofence warrant to obtain data from Google identifying phones near the crime scene.
The police used Google’s data to locate Chatrie among other potential suspects, leading to his conviction. However, his legal team argued that the warrant breached Fourth Amendment protections against unreasonable searches.
Civil liberties advocates claim geofence warrants undermine traditional Fourth Amendment safeguards by introducing suspicion post-search.
One lower court acknowledged the warrant lacked probable cause linking Chatrie to the robbery, but accepted the evidence due to law enforcement’s good faith.
Civil liberties attorney Jennifer Stisa Granick pointed out that an amicus brief by security experts emphasized constitutional violations due to Google sifting through a vast amount of data to fulfil the warrant.
The government argues Chatrie consented to Google’s data collection, and the warrant merely sought needed information. The solicitor general suggested Chatrie’s stance precludes any geofence warrant execution.
Justices appear mixed after hearing arguments
The case’s outcome might not change Chatrie’s sentence, but could have broader privacy implications.
During arguments, the justices appeared divided on banning geofence warrants, leaning towards restricting their usage.
Legal experts, like Orin Kerr and Cathy Gellis, expect the court to allow geofence warrants with limitations, suggesting incremental, not sweeping changes.
Though focused on Google’s data, the case’s impact extends to any company storing location information. Google shifted to storing data on devices to avoid responding to such warrants, a move other companies may not follow.