An official says it may have been a drug deal gone wrong
                                
                                
                                    (Newser) -
                                    The Army suspects that a drug deal gone wrong led to the killings earlier this week of a master sergeant and an Army veteran, an official tells  CBS News . The bodies of Master Sgt. William J. Lavigne II, 37, and Timothy Dumas, 44, were found Wednesday in a training area...