My first thought too.
Did they hold of identifying them for political reasons?
Imagine all the cameras taking images and videos where and when the bombing occurred.
Imagine all the world class investigators immediately viewing these images and videos.
Imagine all the disinformation that was released during the next four days.
Imagine that in total it took over four days to identify suspects and only after Obama gave his Boston speech.
This smells rotten and it smells like politics.