Unlocking mobile phone records is trickier than it seems

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     (<a href='http://www.shutterstock.com/pic-122758183/stock-photo-telecommunications-equipment-directional-mobile-phone-antenna-dishes-wireless-communication.html'>Cell tower</a> image courtesy of Shutterstock.com)

    (Cell tower image courtesy of Shutterstock.com)

    This week’s Amtrak hearings raised plenty of questions about mobile phone records, but few answers.  Members of Congress grilled rail officials on why they couldn’t determine whether the driver of Amtrak train 188 was using his cell phone just before the crash that killed eight.  It turns out those records can be tough to get a handle on.  NewsWorks Tonight Host Dave Heller discussed the issue with University of Southern California Engineering Professor Bhaskar Krishnamachari.

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