S7, E2: Before Hurricane Katrina, the gangland-style murder of Vincent and Margaret Sherry - a state judge and his politician wife - was the biggest news to hit Biloxi, MS and the Gulf Coast. Detectives soon suspect the involvement of an underground network of criminals known as the Dixie Mafia. But the investigation takes a more surprising turn when rumors surface that the Mayor of Biloxi was involved. Years of intense investigating reveal a million dollar phone scam run by Angola prisoners and its secret ties to Biloxi's most powerful figures.