From the Congressional Research Service:
Law Enforcement Use of Global Positioning (GPS) Devices to Monitor Motor Vehicles: Fourth Amendment Considerations
Alison M. Smith
Legislative Attorney
February 28, 2011
This report discusses the basics of GPS technology, society’s reliance on it, and some of the related legal and privacy implications. In addition, the report examines legislative and judicial responses on both federal and state levels.
Read the report on CRS.