(FILES) File picture of the former governor of Nigeria’s oil rich Delta State, James Ibori taken 16 December 2006. Ibori has been arrested on corruption and money laundering charges, an official with the national anti-graft agency said, 12 December 2007. He ruled Delta from 1999 to 2007, has also been under investigation by the British police following the discovery of assets in Britain suspected to have been acquired with money stolen during his tenure. AFP PHOTO PIUS UTOMI EKPEI/FILES (Photo credit should read PIUS UTOMI EKPEI/AFP/Getty Images)