The short answer is yes, they do track your phone if you become somehow involved in an investigation. And without a warrant, that’s supposed to be unconstitutional. A new court victory for the Electronic Freedom Foundation is getting us one step closer to our legal system honoring our Constitution where technology is concerned:
FOIA Victory Will Shed More Light on Warrantless Tracking of Cell Phones | Electronic Frontier Foundation.
The D.C. Circuit Court of Appeals ruled on Tuesday (pdf) that the government must turn over information from criminal prosecutions in which federal law enforcement agencies obtained cell-site location information without a warrant. The suit, filed as part of EFF’s FLAG Project and in conjunction with the ACLU, sought the release of the case numbers and case names in which the government had tracked the location of a person’s cell phone without obtaining a warrant.