Surveillance companies are marketing systems to state and local law enforcement agencies that are capable of gathering signals from cellphones to pinpoint a suspect’s location. These cell-site simulators, or IMSI catchers, are designed so that neither cellphone users nor carriers detect their use. Read related story.


Sources: The Department of Justice, Harris Corp., Tallahassee state court documents, U.S. Patent Office | Lazaro Gamio / The Washington Post February 23, 2015
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