The arrest this month of two Tucson men on charges of smuggling marijuana inside coffins isn't the first time traffickers have used strange methods to try to get their drug loads into and through the United States - nor will it be the last. Officials have had little to say about their investigation into the recent coffin case. Robert Dean Harper and Timothy Gavin Hynd face charges in connection with the smuggling of 610 pounds of marijuana through Oklahoma, where they were stopped by the state Highway Patrol on Dec. 10. Both men, who told investigators they were working for...