Diezani Alison-Madueke was cleared of six bribery charges at Southwark Crown Court on 17 June 2026, ending a five-month UK trial that had hung over her for years. The verdict closes one of the most closely watched corruption cases to reach London, and it does so with a complete acquittal.
The case was brought by the National Crime Agency and turned on alleged offences said to have taken place between 2011 and 2015, when she was Nigeria’s oil minister and later President of OPEC between 2014 and 2015. Prosecutors said she accepted financial or other advantages from people linked to two energy companies that won contracts with Nigeria’s state-owned petroleum corporation, and that she lived a life of luxury funded by those with an interest in the oil and gas deals.
That was the framework jurors were asked to weigh. They did so after hearing that her lifestyle included chauffeur-driven cars, a private jet flight to Nigeria, and refurbishment work and staff costs at several London properties. In the end, the court rejected the bribery case in full, but the verdict does not spell out what specific piece of evidence or which witness persuaded the jury to clear her.
Her defence had pushed hard on a different point: delay. Jonathan Laidlaw said there had been a gross delay in bringing the charges and that the delay had denied her access to a great deal of material which would have established her innocence. He also said records that could have proved her case had disappeared, and that she could no longer reach papers at home in Nigeria because British police had retained her passport since her first arrest 11 years ago.
That complaint matters because the chronology runs against the prosecution as much as the defence. She was first arrested in Britain in October 2015, remained on bail, and was not formally charged with accepting bribes until 2023, even though the alleged conduct under investigation dated back to 2011-2015. In that gap lies the central friction of the case: a claim that the evidence got weaker with time, and a prosecution built around conduct from a former minister whose reach stretched into the top of the global oil trade.
The acquittal ends the latest UK chapter for a figure who has faced legal scrutiny in more than one country, including the United States. What remains unresolved is narrower but still important: whether the delayed charge sheet was the real weakness in the case, or whether the jury simply found the evidence too thin to convict after all those years.
