Police scour landfill for laptop computer, other clues in Boston Marathon bombings

The investigation into the Boston Marathon bombings has expanded to a landfill 60 miles south, where authorities are searching for a missing laptop computer and other clues.Law enforcement sources tell NBC News that investigators on Friday scoured the landfill in New Bedford, Mass., for items that might belong to bombing suspect Dzhokhar Tsarnaev, including the laptop and receipts related to the p...    

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