All agencies on site - does not correlate with just a robber, to me.
Any police officer down will bring in every cop in the area.
Please let it be the marathon perps. Harvard and MIT campuses would have been an ideal place in which to blend — until photos released today.
It could be a robbery by the bombers. Their pictures are everywhere. They’re on the run. They may have been dumped by their support network and are in need of money and transportation.