Paris&#39; prosecutor Jean-Claude Marin (L) speaks during a press conference next to Patrick Hefner (2nd L), Deputy Director of the finance department of the French judiciary police, 28 January 2008 at Paris courthouse, after a Societe Generale statement yesterday outlined the bank&#39;s allegations against accused trader Jerome Kerviel, detailing &#39;the method behind the fraud&#39; that it said cost them 4.9 billion euros. While Kerviel&#39;s lawyer has denied personal wrong-doing, the bank&#39;s statement accused the trader of slaloming his way through controls he knew inside-out from a previous role processing futures buying and selling. French trader Jerome Kerviel started taking &#39;unauthorised positions&#39; in futures trading for Societe Generale bank more than two years ago, in late 2005, the prosecutor said.