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The Boston Globe


On Internet, thousands sift through Marathon photos for clues

As FBI officials worked to identify a suspect in the Boston Marathon bombing, parallel investigations were being conducted on the Internet, where ­amateur sleuths have been identifying their own cast of potential culprits.

There’s the guy with the dark backpack. The man with mangled pants running from the blast. The shadowy figure on the roof of a Back Bay building, moments after the explosion.

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