A former Tennessee governor's administration helped fund a contract murder of a key federal witness decades ago while embroiled in the state's largest political scandal, law enforcement officials announced Wednesday. The new details revealed for the first time Wednesday have elements that ring of a movie: a trusted ally of union boss Jimmy Hoffa gunned down after testifying about a corrupt governor selling prison pardons and a gunman who donned a wig and blackface to throw authorities off the scent. Investigators in Hamilton County, which encompasses Chattanooga, have been chipping away at the 42-year-old cold case of Samuel Pettyjohn since...