Diezani, London and the Problem of Proof By Lawson Akhigbe

Why Suspicion Is Not Evidence and Why Courts Demand More Than Public Opinion

For years, former Nigerian Petroleum Minister, Diezani Alison-Madueke, occupied a unique place in Nigeria’s political imagination. Depending on who was speaking, she was either the symbol of everything wrong with Nigeria’s oil sector or the victim of a political witch-hunt. There was one thing almost everyone agreed upon: she was presumed guilty long before any court had reached a verdict.

Then came London.

After a trial that lasted several months, a jury acquitted her of bribery charges. The decision surprised many Nigerians, not because acquittals are unusual, but because conviction had already become a settled fact in the court of public opinion.

The outcome, however, reveals something important about the difference between suspicion and proof.

One of the difficulties facing prosecutors was that the allegations arose from transactions conducted within a system that is not exactly famous for meticulous record-keeping. Nigerian public administration has often operated through verbal instructions, informal understandings, missing files, unexplained approvals, and paperwork that mysteriously develops legs whenever investigators arrive.

The challenge for prosecutors was not proving that Nigeria has corruption. That is hardly controversial. The challenge was proving, beyond reasonable doubt, that specific criminal acts were committed by a specific individual and supported by admissible evidence.

An English court requires evidence.

An Abuja court also requires evidence.

This is where public expectations and legal reality frequently collide.

Many Nigerians have come to view corruption cases through a political lens. Once allegations become sufficiently widespread, guilt is assumed and the trial is viewed merely as a formality. Courts, however, are expected to operate differently. They do not convict people because newspaper headlines are persuasive or because social media has reached a consensus.

They convict because evidence establishes guilt beyond reasonable doubt.

The legal standard in London was not fundamentally different from the standard that would apply before the Federal High Court in Abuja. Criminal convictions require proof. Documents must be authenticated. Witnesses must be credible. Chains of transactions must be established. Assumptions, rumours, and public outrage are not admissible exhibits.

This is often misunderstood in Nigeria, where many people regard an acquittal as proof that a judge has been compromised. Sometimes the simpler explanation is that the prosecution failed to prove its case.

The Diezani case also highlights another uncomfortable reality. Modern anti-corruption investigations depend heavily on records. Bank records. Corporate records. Government records. Procurement records. Audit trails.

Where those records are incomplete, contradictory, or non-existent, criminal prosecution becomes infinitely more difficult.

A prosecutor cannot walk into court and tender “everybody knows what happened” as Exhibit A.

The irony is that the same governance culture that creates opportunities for corruption often makes corruption difficult to prove. When decisions are undocumented, contracts are opaque, approvals are informal, and accountability mechanisms are weak, investigators are left trying to reconstruct events years later from fragments and recollections.

That is a difficult task in any jurisdiction.

The London verdict does not necessarily establish that every allegation made over the years was false. Equally, the allegations themselves do not establish criminal guilt.

The verdict simply demonstrates a principle that lies at the heart of every credible legal system: accusations require proof.

This is not a British principle. It is not an American principle. It is not even a Nigerian principle.

It is a legal principle.

And whether one is standing before a jury in London or a judge in Abuja, the burden remains the same.

The prosecution must prove its case.

If it cannot, the defendant walks free.

That is not a failure of justice.

That is justice operating exactly as it is supposed to.