Secretly Stalking Your Car Has Never Been Easier for Police 3.02K Jeff Neumann 08/27/10 04:30AM Filed to: Protect and serve Protect and serve Cops Police California Court Laws Spying Did you know that in nine western states it's legal for cops to secretly put a GPS tracker on your car, without a warrant? No big deal, right? Because we know that all cops can be trusted, all the time.