Primary investigative jurisdiction of possible violations of the mail and wire fraud statutes is vested in the Federal Bureau of Investigation. In some cases, complaints involving securities may be investigated by the Securities and Exchange Commission. In addition, the Postal Inspection Service of the United States Postal Service may initiate mail or wire fraud investigations. In both situations, the investigations are usually continued by the agency initiating the investigation. Reports of investigation are disseminated directly to the appropriate United States Attorney.
[cited in USAM 9-43.100]