@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.