One of the blast sites on Boylston Street near the finish line of the 2013 Boston Marathon.
There is a lot of restless energy surging through the web.A legion of Internet investigators are scrutinizing every available photo of the Boston Marathon finish line, searching for clues that will help nab a killer. At Reddit, Imgur and a zillion blogs, notes are being shared, theories propounded — and, without question, innocent people are getting slandered.