04/12/2010 05:12 am ET | Updated May 25, 2011

FBI And Cell Phones: Court To Decide If Feds Needs Warrant For Phone Tracking Records

The Justice Department is poised this week to publicly defend a little known law enforcement practice that critics say may be the "sleeper" privacy issue of the 21st century: the collection of cell phone "tracking" records that identify the physical locations where the phones have been.

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