Bipartisan bill demands warrants before police could track phones

"New legislation Wednesday that would force police and other agencies to get a warrant before tracking the movements of suspects using GPS data. The law is aimed at clearing up a legal question that even US courts have struggled to answer..."

http://www.geektime.com/2017/02/17/bipartisan-bill-would-close-loophole-require-warrants-before-police-could-track-phones-using-cell-simulators/