Enron president Jeffrey McMahon stands down Jeffrey McMahon, president and chief operating officer of Enron, the bankrupt energy trader, resigned effective June 1. "I believe that making room for new leadership before we announce the plan for the new company is best for Enron's stakeholders and for me," said Mr McMahon, who confronted senior executives about improper accounting practices that led to Enron's collapse. 01:36  | Read Class action names players in Enron scandal An array of executives, lawyers, bankers and institutions were formally named on Monday in an amended class action complaint for their alleged role in the Enron scandal. 00:44  | Read Latest Headlines Andersen drops Enron shareholder offer to $300m Enron in-depth - taking a closer look The Financial Times takes a deeper look at Enron and the events surrounding its collapse in a special series of features on the collapsed energy trader. click here Andersen's demise Editorial comment: Countdown to four The Fat Four. It has such a ring to it, it feels as though it has happened already: that the world of accountancy is now dominated by just four firms instead of the Big Five. Accounting after Enron Rewriting the books A special investigation into accountancy in the wake of the energy giant's collapse, examining the corporate, regulatory and accounting industries response to events. Corporate responsibility Feeling the heat George W. Bush wants chief executives to become more accountable for financial problems at their companies following the collapse of Enron. FT investigation Enron: virtual company, virtual profits Amid intense US congressional questioning of Enron directors and officials, there is a growing suspicion that at the heart of the once-mighty energy trader was a financial hole.