You said you contacted the SEC and the FBI, did you consider the Secret Service? They investigate a lot of organized crime when it relates to finance.
Their "dual mission"[1]:
The mission of the United States Secret Service is to safeguard the nation's financial infrastructure and payment systems to preserve the integrity of the economy, and to protect national leaders, visiting heads of state and government, designated sites and National Special Security Events.
Their "dual mission"[1]:
The mission of the United States Secret Service is to safeguard the nation's financial infrastructure and payment systems to preserve the integrity of the economy, and to protect national leaders, visiting heads of state and government, designated sites and National Special Security Events.
[1]http://www.secretservice.gov/mission.shtml