When Lehman Brothers Holdings Inc. abruptly filed for bankruptcy in September 2008, many stunned employees walked away with little more than boxes filled with desktop knickknacks. A little-known bond trader, Jonathan Hoffman, took something else: an IOU for $83 million in unpaid bonuses. More than six years later, Mr. Hoffman is still trying to collect. As part of a continuing bankruptcy-court battle in Manhattan with the Lehman bankruptcy trustee, both sides agree that Mr. Hoffman earned profits of more than $750 million for the bank in the turmoil of 2007 and 2008 while trading government bonds as a self-described ... (full story)