The Bureau of Alcohol, Tobacco, Firearms and Explosives intentionally overstated the duties of dozens of employees, labeling them as law enforcement agents so it could pay them more money and costing the government tens of millions of dollars.Investigators said ATF has been making overpayments since at least 2003. They identified more than 100 jobs in human resources and other administrative areas that were misclassified as criminal investigators.They said the government wasted roughly $20 million on overpayments in just one five-year period.ATF officials disputed the exact numbers but admitted to the overall nature of the scam. Officials said they are still...