A court in the United States has ruled that geofence warrants, which allow police to track people's locations, violate the Constitution.
These warrants let police see who was near a crime scene when it happened, using data collected by companies like Google.
The court said these warrants are too broad and allow police to snoop on too many people without enough reason.
This decision could make it harder for police to use location data in investigations, but it also protects people's privacy.
