An Atlanta-area man dubbed the “Master of Disguise” is accused of robbing 10 stores at gunpoint during his months-long “reign of terror.” 4 An Atlanta-area man dubbed the “Master of Disguise” allegedly robbed 10 stores at gunpoint while in different outfits. Department of JusticeIn each case, Mingo allegedly pulled a gun on store employees and demanded money, prosecutors said. 4 Tracy Daryl Mingo allegedly robbed the stores while posing as a construction worker, health care professional and security guard. 4 During each robbery, Mingo allegedly pulled a gun on employees and demanded money.