London court acquits former Nigerian Oil Minister Diezani Alison-Madueke of Bribery

A London jury acquitted former Nigerian Minister of Petroleum Resources Diezani Alison-Madueke of all six bribery-related charges on Wednesday, bringing a sudden, dramatic end to an 11-year international corruption investigation.

Following more than 46 hours of deliberation across a five-month trial at Southwark Crown Court, the jury found the 65-year-old former OPEC president not guilty on five counts of accepting bribes and one count of conspiracy to commit bribery. The verdict represents a significant defeat for the UK’s Crown Prosecution Service (CPS) and the National Crime Agency (NCA), which had positioned the case as a flagship effort to show Britain would not serve as a haven for foreign illicit wealth.

“Today, at Southwark Crown Court, I was acquitted of all charges brought against me,” Alison-Madueke said in a statement released immediately after the verdict. “For eleven arduous years, this matter has weighed heavily upon me and my family. Today, a decade of unrelenting and unjust vilification, condemnation, and scrutiny has finally concluded. I am deeply relieved. My name has been cleared, and this ordeal has come to an end.”

Alison-Madueke, who served as Nigeria’s oil minister from 2010 to 2015 under President Goodluck Jonathan, was accused by British prosecutors of utilizing her ministerial position to steer lucrative state oil contracts toward favored energy firms, specifically Atlantic Energy and SPOG Petrochemical.

The prosecution argued that in exchange for these favors, oil executives funded a “life of luxury” for her in London. The state produced evidence of over £2 million spent at Harrods, chauffeur-driven cars, private jet flights, luxury property renovations, and high-value gifts, including a £25,000 Chanel handbag and an £22,000 Alexander McQueen rug.

Taking the witness stand in her defense, Alison-Madueke successfully dismantled the prosecution’s narrative, explaining that she did not solicit favors and that many of the luxury expenses were legitimate loans from associates that were thoroughly reimbursed, or logistical arrangements covered directly by the Nigerian state for official business.

“I made sure they were reimbursed properly,” Alison-Madueke told the court during her testimony, noting that her husband frequently funded personal expenses. She added that Nigeria’s deeply rooted “gift-giving culture” and “reverence for leaders” often led associates to independently handle logistics without her asking.

Her defense barrister, Jonathan Laidlaw KC, also stressed to the jury that a “gross delay” by the UK government in bringing the case to trial meant critical records that would have verified her innocence years ago had vanished or been destroyed. Co-defendants Olatimbo Ayinde, an oil executive, and her brother, Doye Agama, were also completely cleared of all conspiracy charges.

The comprehensive acquittals leave British law enforcement empty-handed after committing immense investigative resources to the multi-jurisdictional probe since 2015. Anti-corruption watchdogs warned the outcome exposes structural challenges within the UK’s legal framework when tackling politically exposed persons (PEPs).

“This case has exposed just how tough it is to investigate and prosecute alleged corruption involving political elites,” Zainab Saleem, a legal fellow at the UK-based charity Spotlight on Corruption told Financial Times. Saleem noted that the NCA has been left “empty-handed in one of their highest-profile corruption cases, which took over a decade to progress to trial.”

Both the Crown Prosecution Service and the National Crime Agency issued brief statements acknowledging the legal defeat, with a CPS spokesperson stating, “Following an investigation by the National Crime Agency, the Crown Prosecution Service authorised charges against the defendants based on the evidence available. It is for the jury to decide the outcome and we respect the jury’s decision.”

While the London criminal trial has concluded, the wider legal complications surrounding the former minister’s tenure remain active. Separate civil asset recovery cases pushed forward by the U.S. Department of Justice and the Nigerian government—which operate under a lower standard of proof than a UK criminal court—have previously targeted millions of dollars in real estate assets linked to the era.

Nevertheless, for Alison-Madueke, the Southwark Crown Court ruling represents a total criminal vindication on British soil. “This, however, is not the final chapter,” her statement concluded. “In due course, I shall address this difficult period in greater detail and share my intentions for the future.”