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A geofence warrant typo cast a location dragnet spanning two miles over San Francisco


ACLU lawyers say an "alarming error" in a geofence warrant resulted in data collection "stretching nearly two miles across San Francisco."

Civil liberties advocates have long argued that “geofence” search warrants are unconstitutional for their ability to ensnare entirely innocent people who were nearby at the time a crime was committed. “Whether you were in your hotel room or grabbing a salad at Mixt Greens on Commercial Street — with no connection at all to any criminal activity — your location information might well have been shared with the police,” ACLU’s Snow wrote. Other tech companies that store troves of users’ location data — like Uber, Microsoft, and Yahoo (which owns TechCrunch) — are known to receive geofence warrants.

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