I think this is a terror attack. And I think it is being downplayed to the point of coverup.
I could be wrong, but that's how it looks to me, too.
UPDATE: Reader Ken Price writes:
I've had the disturbing thought that the single-shot assassinations in Mongomery County are, in effect, a response to Ari Fleisher's observation that a single shot could resolve the situation in Iraq. Could this be intended as a warning that capable agents are already in place and ready to cause chaos if war breaks out?
Hmm. This seems (1) too fast; and (2) too "poetic" (well, at least in an Amiri Baraka sense) to be a response to that statement. But it's an interesting suggestion.