He had pleaded guilty in a London court in 2012 to a 10-count charge of fraud and money-laundering, involving sums amounting to at least 50 million pounds ($66 million).
James Ibori, a former Governor of Delta State who was jailed in Britain for laundering tens of millions of dollars in stolen public funds through British banks and properties, has lost an appeal against his conviction in London.
Ibori lost the appeal against his conviction on Wednesday.
He had pleaded guilty in a London court in 2012 to a 10-count charge of fraud and money-laundering involving sums amounting to at least £50 million ($66 million).
He received a jail sentence of 13 years, and served half the jail term as is common in the British system.
The former Governor, who is now back in Nigeria, appealed against his conviction, alleging misconduct by the British Police and prosecutors, which he argued, tainted the judicial process.