(CNN) -- Law enforcement officers may secretly place a GPS device on a person's car without seeking a warrant from a judge, according to a recent federal appeals court ruling in California.
http://www.cnn.com/2010/CRIME/08/27/oregon.gps.surveillance/index.html?hpt=T1
http://www.cnn.com/2010/CRIME/08/27/oregon.gps.surveillance/index.html?hpt=T1