The U.S. Internal Revenue Service is drafting a policy to restrict the use without a warrant of cell-site simulator technology to snoop on the location and other information from mobile phones.
The head of the IRS, John Koskinen, wrote in a letter that the agency was drafting a policy that would mirror an earlier Department of Justice rule, which requires a search warrant supported by probable cause before using the technology, except in exigent or exceptional circumstances.
