End of a 13-year investigation.. Why did Britain acquit the former Nigerian Minister of Petroleum?
Former Nigerian oil minister leaves dock in London
Books. Mohamed Omran
In a major blow to a 13-year British anti-corruption investigation, a London court acquitted Nigerian Minister of Petroleum Resources Former Diezani Alison-Madueke is cleared of all bribery charges.
End of a 13-year investigation.. Why did Britain acquit the former Nigerian Minister of Petroleum?
After a five-month trial at Southwark Crown Court, the 65-year-old man was acquitted of five counts of receiving bribes and one count of conspiracy to commit bribery. This verdict ends a lengthy investigation by the UK's National Crime Agency (NCA) into one of Africa's most prominent political figures.
Former Nigerian oil minister leaves dock in London
Alison-Madueke, who served as Minister of Petroleum from 2010 to 2015 and later chaired the Organization of the Petroleum Exporting Countries (OPEC), has been accused of exploiting lucrative contracts for a lavish lifestyle in London.
British investigators claimed she received at least £100,000 (US$136,525) in cash, in addition to private jet flights, luxury goods, and property maintenance expenses from wealthy oil executives.
During the trial that began in January, she portrayed herself as a strict enforcer of the rules, earning the nickname “Lady Due Process," and told the court she never asked for or accepted bribes, asserting she advised businessmen on interior design and that many luxury purchases were not hers.
She also testified that Nigerian ministers are banned from having foreign bank accounts while serving abroad, forcing her to rely on wealthy acquaintances to cover living expenses. She claimed these funds were always repaid in Nigeria, but the records proving the repayments were confiscated from her Abuja home and never presented by the authorities.
Alison-Madueke's defense team argued that the prolonged delay in bringing the case to court was unfair, asserting that crucial documents proving her innocence had been lost in Nigeria. Former President Goodluck Jonathan submitted a statement to the court supporting her case, confirming that external entities often cover the transportation and accommodation costs for ministers on official foreign assignments.
The jury also acquitted Alison-Madueke's associates in the case; her 69-year-old brother, Doye Agama, a Pentecostal archbishop in Manchester, was acquitted of conspiracy to commit bribery.
Olatimbo Ayinde, a 54-year-old executive in the oil sector, was also cleared of bribery charges after her lawyers argued that she was acting as an informant for Nigerian authorities to expose corruption, encouraged by security agencies to “cooperate with them.”.
Legal proceedings were brought in London in parallel with wider, ongoing global legal and asset recovery efforts, and in 2017, Nigerian prosecutors filed separate money laundering charges against her, alleging she paid money to influence election officials ahead of the 2015 election.
Despite the acquittal in Britain, the judicial file of Alison-Madueke has not been entirely closed, as she still faces separate charges in Nigeria related to money laundering and influencing officials during the 2015 elections.
At the same time, U.S. and Nigerian authorities continue with procedures to recover assets suspected of being linked to corruption cases in the oil sector. The U.S. Department of Justice has previously recovered more than $53 million in funds it stated were linked to oil revenues laundered through the United States. Washington and Abuja also announced an agreement in 2025 to return an additional $52.88 million in confiscated assets.
The British ruling marks the end of one of the longest corruption investigations into a high-ranking African official within the United Kingdom, but it does not signify the dismissal of all legal cases related to Alison-Madueke, as cases pending before the Nigerian judiciary and asset recovery proceedings in the United States remain active, leaving this file open to new developments despite the closing of the British trial.
