Michael Adoboli faces four charges of fraud and false accounting . The accountant at Swiss bank Zurich was arrested last week . A new charge of fraud by abuse of position from October 2008 to October 2010 was also added Thursday . UBS says it has lost $ 2.3 billion in unauthorized funds . Adoboli has not yet made a confession to the charges .
Michael Adoboli faces four charges of fraud and false accounting . The accountant at Swiss bank Zurich was arrested last week . UBS says it has lost $ 2.3 billion in unauthorized funds . Adoboli has not yet made a confession to the charges .