Interesting that this happened soon after the new AQ tape releases and after the Buffalo cell busts...
It happened even closer to the Oregon cell bust. And since the snipers appears to personalizing this with Moose, youhave to wonder if Moose didn't help bust the Oregon cell.
A couple of Oregon cell members had spent some time in Maryland. Maybe you're right about Moose. This is payback for him in a way or psyops games with him.