From Virginia to Florida, law enforcement all over the US are increasingly using tools called reverse search warrants " including geofence location warrants and keyword search warrants " to come up with a list of suspects who may have committed particular crimes. While the former is used by law enforcement to get tech companies to identify all the devices that were near a certain place at a certain time, the latter is used to get information on everyone who's searched for a particular keyword or phrase. It's a practice public defenders, privacy advocates and many lawmakers have criticised, arguing it violates fourth amendment protections against unreasonable searches. Unlike reverse search warrants, other warrants and subpoenas target a specific person that law enforcement has established there is probable cause to believe has committed a specific crime. But geofence warrants are sweeping in nature and are often used to compile a suspect list to further investigate. Google broke out how many geofence warrants it received for the first time in 2021. The company revealed it received nearly 21,000 geofence warrants between 2018 and 2020. The tech giant did not specify how many of those requests it complied with but did share that in the second half of 2020, it responded to 82% of all government requests for data in the US with some level of information. Apple has taken steps to publish its own numbers. In the first half of 2022 the company fielded a total of 13 geofence warrants and complied with none.