pricewaterhousecoopers en Political Whodunit Puts Spotlight on Williamson County <p>WASHINGTON (AP/WMOT) — A political whodunit has the national media focused on Williamson County.</p><p>The Secret Service was in Franklin Thursday investigating claims that someone burglarized a PricewaterhouseCoopers accounting office there&nbsp;and stole two decades' worth of presidential candidate Mitt Romney's tax returns.</p><p>Authorities are studying computer thumb drives that were delivered with an unusual demand: a $1 million payment in hard-to-trace "Bitcoin" internet currency.</p> Fri, 07 Sep 2012 11:36:38 +0000 AP/WMOT 15437 at