Parts of your reply are those gnawing things that many of us have had since the sniping began:
I think this is the most telling aspect that marks this as suspected terrorism.
That was the first thought that entered my mind when I heard about this.
Second you posted, I'm betting the sniper is black muslim and probably connected to al Fuqra.
Those of us who know the relationship fo the Black Muslims to the al Fuqra thugs and on to al Qaeda will not be surprised if what you posted here is the reality.
Luckily for that child, his aunt is a nurse in the trauma center where the boy was airlifted to for care. She got him initial help and probably saved his life.
Heard one of the talking heads saying that a lot of hotshots from the media live in the community where the first murders took place.