House Financial Services oversight subcommittee

Former chairman and CEO of MF Global and former New Jersey Gov. Jon Corzine testifies during a hearing before the Oversight and Investigations Subcommittee of the House Financial Services Committee on Dec. 15, 2011 on Capitol Hill in Washington, D.C. (credit: Alex Wong/Getty Images)

MF Global Exec Pleads Fifth When Questioned About Missing $1 Billion

Witnesses close to MF Global’s collapse are offering details about customer money that vanished days before the firm failed. Their testimony could challenge previous statements by former CEO Jon Corzine.