Sensorvault is an internal Google database that contains records of users' historical geo-location data.
[1]: 1 [3]: 1 [2] However, the use of geo-fence warrants has raised privacy concerns, as they can ensnare uninvolved bystanders and undermine individuals' right to privacy.
[4] The warrants frequently rely on the assertion that "Americans owned cellphones and that Google held location data on many of these phones" to establish probable causes.
[5] In response to growing concerns, Google has announced plans to end the practice of responding to geo-fence warrant requests for users' location data.
[6] The company will be making several changes to the way it handles "Location History" data: These changes are expected to make it much more difficult, if not impossible, for Google to provide mass location data in response to geo-fence warrants.