WASHINGTON – Government agents acting without authorization conducted dozens of undercover investigations of illegal tobacco sales, misused some of $162 million in profits from the stings and lost track of at least 420 million cigarettes, the Justice Department's inspector general said Wednesday. In one case, agents for the Bureau of Alcohol, Tobacco, Firearms and Explosives sold $15 million in cigarettes and later turned over $4.9 million in profits from the sales to a confidential informant — even though the agency did not properly account for the transaction. The audit described widespread lack of ATF oversight and inadequate paperwork in the...