| http://www.w3.org/ns/prov#value | - Even those that have not tracked cellphones in the course of a criminal investigation have tracked cellphones in emergencies, for example to locate a missing person.The use of phone tracking, using GPS or other technology to locate people through their cellphones, is a murky legal area.The US Supreme Court has held that the use of GPS devices placed by police on a suspect's car constitutes an un
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