Thomas Müller At this stage of our national arrested development, if we can’t find an intrepid journalist(s) with a pair — like a Michael Hastings or Gary Webb, for example — to investigate the Squirrel Hill and other shootings and to corroborate the evidence and victims, then it will simply be one more nail in the already sealed “U.S. coffin.” One of the most startling elements of the Pittsburgh synagogue shooting event is that nine of the 11 killed were seniors, and five could be classified as quite elderly. Average…