Scam artists and conspiracy theorists are out and taking advantage of the tragedy in Boston.
The spread of misinformation makes it hard to know what to believe. For example, a picture of a man on a roof near the blast site has many wondering if he's a suspect. So far, no one knows for sure, but there's no evidence the explosives were detonated from a rooftop and it seems likely spectators would want to take in a view of the finish line from above.
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