@firefly,
If you go to Google Earth and search for 888 Bestgate road, Annapolis - you can zoom in and get an idea of how congested that area is. Forty years ago, most of the area was open and now there are numerous businesses, a hospital, the Annapolis Mall, very heavily traveled.
It occurred to me that the shooter wouldn't have been able to easily slip away and escape....it isn't always easy to get to a major highway, just too much traffic.
Of course I'm speculating, but maybe he wasn't planning on leaving alive.
I expect another press briefing very soon. Every elected official in Annapolis and Anne Arundel county have arrived to offer thoughts and prayers.