There is a picture of this guy on BBC
here. Not that I really think it matters. The idea of killing Muslims did really inhibit 9/11 that much.
I WOULD think that the police should be more interested in the first case, since it's much more likely that the shooter could start with someone he knew, get a kick out of it, and then branch out.
AQ would have no qualms about shooting what they may have thought was a Muslim working in a LIQUOR STORE.
Remember, they hate westernized Muslims as much as they hate Jews.