Now that the FBI have photos of their two main suspects, we can sort through the 5 people Reddit and 4chan were convinced had something to do with Monday's bombing.
The Running Man
Source: i.imgur.com
He was running away from the scene of the explosion. Also, The Daily Mail picked up the theory.
Amateur pictures taken by someone in a nearby office building may show the man responsible running away from the scene - though this is only speculation.
'I went to the window and I was looking in the direction of the finish line. I saw simultaneously a runner go down, a huge explosion, and then a deafening roar,' Benjamin Thorndike said. 'I had my camera in my hand, and I just pushed the rapid-shutter button down and just took 25 pictures over the course of what felt like a long time, but I think it was only 15 or 20 seconds.'
Roof Guy
Source: theblaze.com