Originally Posted by kaldaniels
If that bag truly disappeared, then they have got to be suspects.
But my gut reaction (I'm a believer in that - see Malcolm Gladwell's "Blink") says they are just 2 Marathon runners.
That's the problem with going with the "bag - no bag" theory. Nearly every runner brought a bag, then gave it to someone while they ran. I imagine there are thousands of pics of people with bags, then later without them on that day.
From what I heard reported, the suspect in question was seen putting down a bag near where the explosion happened, and then walked away, leaving it there for over an hour. Even that isn't conclusive.