 American investigators are trying to determine whether that money was stolen as part of a web of bribery, kickbacks, theft and conspiracy that they have laid out in a series of indictments and court papers.No suspicion for the missing money has fallen on Ms. Holland or Mr. Zangas.Investigators tracing the flow of the cash to Ms. Holland and Mr. Zangas are looking at the possibility that others took advantage of the deaths to steal additional money.