California cops barred from warrantless GPS, cellphone tracking

"California's state legislature passed the Location Privacy Act of 2012 (SB-1434) on Wednesday, which would make it mandatory for law enforcement agencies to obtain a warrant before gathering any GPS or other location-tracking data that a suspect's cell phone might be sending back to its carrier."

This bill flies in the face of a recent federal ruling stating cops can warrantlessly track suspects via cellphone.

http://arstechnica.com/tech-policy/2012/08/california-state-...