Allie Bohm writes:
Montana just made history. It recently enacted the first state law in the nation(sponsored by Rep. Daniel Zolnikov (R-Billings)) requiring law enforcement to obtain a probable-cause warrant before tracking an individual based on his or her cell phone location information, social networking check-ins, or via a GPS tracking device in a criminal investigation. (A few states do have laws pertaining only to GPS tracking.)
Read more on ACLU’s blog.