The rogue trader who cost France's biggest bank Societe General 4.9bn euros
The rogue trader who cost France's biggest bank Societe General 4.9bn euros, was detained by the police.
Jerome Kerviel is being held for questioning about the alleged fraud at the French bank, Societe Generale.
The 31-year-old trader had not been seen since the financial scandal broke on Thursday. His family and lawyer have insisted he is innocent.
Correspondents say the police never launched a manhunt for the trader and it is likely they knew all along how to find him.
Mr Kerviel may be held for 24 hours without charge, with a possible extension if granted by a judge.