finance.fortune.cnn.com —
How Jon Corzine's return to Wall Street ended in spectacular calamity. A Fortune special report. By Peter Elkind with Doris Burke Jon Corzine FORTUNE -- At about 9:30 p.m. on Tuesday, October 25, David Schamis, a director of a once-obscure futures brokerage company called MF Global, placed a call to his friend, Jacob Goldfield.