The FBI directed a local police department to drop criminal charges against a suspect in 2012 to avoid the public finding out about a secret device to track people, CNN reports.
The device, called the “Stringray,” allows investigators to find suspects by tracking their cell phones. The technology mimics a cell phone tower, tricking the phone into switching over to the “Stringray” while investigators access the location.
Judge Patrick H. NeMoyer in Buffalo, NY, has indicated he wants the FBI to turn over details of the secret technology that the bureau was using with Erie Police in Pennsylvania.
According to CNN, police used the device to track several criminal suspects, four missing people and a suicidal person.
But the judge believes the public has a right to know more details of the technology.