It looks like the end of the road for a long-lived inquiry into possible misappropriation of funds by a (now former) Postal Regulatory Commission employee. In a new activity report covering the six-month period from October through March, the PRC’s inspector general said he referred the case to the U.S. Attorney for the District of Columbia, who declined to prosecute. The matter dates back to a 2008 IG audit related to bookkeeping practices at the commission, a five-member panel that oversees the U.S. Postal Service. Among other no-nos, auditors flagged a non-interest-bearing checking account containing almost $192,000. That came as…