I heard those shots (I live on 5th and D).  There were quite a few shots fired in a short period of time.  I've been waiting 2 days to find out what happened, because ADN doesn't always report these incidents.  I hear shots all the time and never see anything written in the paper about them.  A good site to find out what's actually going on in town is http://local.nixle.com/anchorage-police-department/    Best of everything to the officer, get well soon.