The Wisconsin state Senate plans to vote on a bill that would prohibit police from tracking cellphone locations without a warrant.
The measure up for a vote Tuesday passed the Assembly last week without opposition.
Under the bill, police would have to submit details about their investigation in the application for a warrant to track a cellphone.
That information would include the subject of the investigation, a statement of the crime and a statement of probable cause to believe there is criminal activity. Police would also have to decide how tracking the phone would yield relevant information.
If the bill passes the Senate, it would head to Gov. Scott Walker for his consideration.