Last week, Missouri passed HB1388 which bans law enforcement from tracking cellphone location data without warrant. It also explicitly bans location data being used a probable cause to issue a warrant. The bill passed with overwhelming support with a 134-13 vote.
It is a step in the right direction for privacy advocates, who are concerned that law enforcement agencies are increasingly deploying systems for tracking the location of ordinary citizens under no suspicion of crimes. Cellular location tracking is one of many technologies being used including license plate readers, wireless toll transmission data, social networking tracking, and more.
This law will also give leverage to people in Missouri who are concerned about the actions of the American agencies performing dragnet surveillance in the state.