Former Societe Generale trader Jerome Kerviel (L) and his lawyer David Koubbi leave Koubbi's office on their way to the Paris court for the verdict in his appeal trial October 24, 2012. Kerviel, the man behind France's biggest rogue-trading scandal, finds out today whether he is heading to prison or walking free after his last court appeal in a four-year battle against former employer Societe Generale. Former trader Kerviel submitted a final attempt in June to be acquitted and avoid a three-year jail sentence handed down in 2010 for his role in taking huge, risky bets that cost SocGen 4.9 billion euros ($6.4 billion) to unwind and slammed the French bank's reputation. REUTERS/Gonzalo Fuentes (FRANCE - Tags: BUSINESS CRIME LAW)