It's obvious that a scandal of this size could not have been done without many people being deeply involved. Cheating so many out of billions required a lot of coordination so there are bound to be more arrests. MSNBC.com:
The FBI arrested Jerome O'Hara, 46, and George Perez, 43, at their homes on Friday morning on criminal charges of conspiracy for falsifying books and records at both the broker-dealer and investment arms of Bernard L. Madoff Investment Securities LLC (BLMIS) in New York.
"The computer codes and random algorithms they allegedly designed served to deceive investors and regulators and concealed Madoff's crimes," said federal prosecutor Preet Bharara. "They have been charged for their roles in Madoff's epic fraud, and the investigation remains ongoing."