The Financial Investigations Division says it has evidence of more than 200 affected accounts at fraud-hit investment firm Stocks and Securities Limited (SSL).
It says the fraud and other irregularities related to clients' funds now exceeds what it terms a staggering US$30 million.
But the FID says despite numerous appeals and direct means of communication, it has only received 23 official statements from affected individuals and entities.
According to the FID, the investigative process is far advanced and a file has been sent to the prosecutors who are reviewing evidentiary material with a view to determining possibly charges.
The FID says the probe extends beyond Jamaica and includes collaboration among law enforcement agencies in other jurisdictions.
Meanwhile, former wealth advisor at SSL, Jean-Ann Panton was further remanded after she appeared in court Wednesday on fraud charges.
Her next court appearance is May 27.