On July 3, 2013 the SEC filed a complaint against a bunch of foreign nominees used to hold BIZM stock in order to put a freeze on accounts opened in their names (some of which still had unsold BIZM stock and cash in them). In the Complaint the SEC cites Scottsdale Capital Advisors in Arizona and Legend Securities Inc for their involvement in facilitating the illegal sale of the unregistered stock held in the nominee accounts https://www.sec.gov/litigation/complaints/2013/comp-pr2013-122.pdf
The FBI and SEC have followed the bread crumbs up until the BIZM shell came under control of the Francisco Abellan group but that's where things get tough because starting at that point everything was done overseas (Brazil, Argentina, UK, and different tax havens).