If the sniper or snipers in this case turn out to be Middle Eastern, there should be no arrests, trials, or anything of that sort. This country gave a very clear indication that it was not serious about fighting terrorism back in 1993 when the WTC bombers were arrested instead of "offed" without a trace.
The U.S. government continues to operate in this fashion even after 9/11 -- witness the arrests all over the world that have been proudly announced periodically over the last year.
This isn't a freakin' "war on terror" -- it's "The People's Court" in Arabic.
We have and we use it, although if I remember correctly, our carpetbagging DimRAT Guv. floated a few trial ballons to see if it would get any votes if he put a moratorium on it like the leftists in MD. He won't touch it now though.