A Record 75 Years: Inside Nigeria's Toughest Corruption Sentence in Recent Memory

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Case: Federal Republic of Nigeria v. Saleh Mamman Court: Federal High Court, Abuja — Hon. Justice James Omotosho Status: Concluded — conviction and sentencing (May 2026)

Nigeria has convicted plenty of former public officials over the years. It has rarely, if ever, sentenced one to a number that sounds more like a life sentence stacked on top of itself. This case did exactly that — and the reason the total reached 75 years has as much to do with a specific judicial choice about how to add up a sentence as it does with the size of the fraud itself.

Facts of the Case

Saleh Mamman served as Nigeria's Minister of Power from 2019 to 2021, under President Muhammadu Buhari's administration, with oversight of the country's major federal power infrastructure — including two of Nigeria's most significant hydroelectric undertakings, the Zungeru and Mambilla projects, both meant to meaningfully ease Nigeria's chronic electricity shortages.

According to the Economic and Financial Crimes Commission (EFCC), which investigated and prosecuted the case, Mamman diverted roughly ₦33.8 billion (about $24.7 million) in funds earmarked for those projects, routing the money through private companies and, according to reporting, through Bureau de Change operators who helped convert large sums into foreign currency. He was arrested and detained by the EFCC in May 2021 and formally arraigned in July 2024 on twelve counts, centred on conspiracy and money laundering.

Trial and Verdict

The case proceeded before Justice James Omotosho at the Federal High Court in Abuja. On 7 May 2026, the court convicted Mamman on all twelve counts, finding — in the judge's own words as reported from the bench — that the prosecution's evidence was overwhelming, and that Mamman had failed to produce anything convincing to counter it. Twelve days later, on 19 May, the court proceeded to sentencing.

Why the Number Reached 75 Years

Nigerian courts sentencing someone on multiple counts routinely order the resulting prison terms to run concurrently — meaning the sentences overlap, and the convicted person effectively serves only the longest single term, not the sum of all of them. That's the more common approach.

Justice Omotosho did something different: he ordered the sentences on Mamman's twelve counts to run consecutively — one after another, rather than simultaneously. Reports of the sentencing breakdown describe seven years' imprisonment (without the option of a fine) on ten of the twelve counts, a separate three-year term with a ₦10 million fine option on one count, and a two-year term without a fine option on the remaining count. Stacked one after another rather than overlapping, those individual terms add up to the reported 75-year total — a sentencing structure, not simply one very long term for one offence.

The court also ordered Mamman to refund the shortfall between what had already been recovered from him and the ₦22 billion the prosecution successfully established at trial, and directed that the sentence run from the date of his original arrest.

What Happened After the Verdict

Mamman didn't appear for the judgment. He had reportedly been publicly discussing a run for Taraba State governor in Nigeria's 2027 elections in the period before his conviction, but went missing around the time of sentencing. The court, sentencing him in absentia as Nigerian law permits, ordered security agencies both within Nigeria and internationally to locate and arrest him. According to reporting, EFCC operatives located and arrested him in the Rigasa area of Kaduna on 19 May — the same day sentencing was handed down — in what the agency described as an intelligence-led operation.

Mamman also isn't finished with the courts more broadly. Separately from this concluded case, he is reported to be facing an additional, unrelated set of fraud charges — around ₦31 billion — at the FCT High Court in Maitama, Abuja, where he was arraigned alongside seven others in October 2025 and has been granted bail. That matter remains ongoing and unresolved, distinct from the case covered here.

Why This Case Stands Out

A few things make this conviction significant beyond its size. Commentary around the case has repeatedly described convictions of senior former Nigerian public officials as historically rare, which is part of why this result drew as much attention as it did. The sentence itself — 75 years for a man reported to be around 68 years old — functions, as one lawyer commenting on the case put it, as a sentence that will realistically outlast the defendant's own lifespan, whatever term he actually ends up serving in practice.

The technique Justice Omotosho used is also worth understanding in its own right, since it's likely to come up again in future corruption sentencing. Ordering sentences to run consecutively rather than concurrently is a real judicial choice, not just a formality — it can transform what would otherwise be a modest effective sentence into something dramatically more severe. Whether Nigerian courts lean more toward this approach in future high-profile corruption cases, or whether this proves to be an outlier, is likely to shape how much deterrent weight future sentencing actually carries.

Final Verdict

Justice James Omotosho convicted Saleh Mamman on all twelve counts of conspiracy and money laundering relating to the diversion of ₦33.8 billion in power sector funds, and sentenced him to a cumulative 75 years' imprisonment by ordering the individual sentences to run consecutively. Mamman was arrested shortly after the ruling, having failed to appear for judgment.

Key Takeaways

  • A sentence's headline number can depend heavily on how a judge structures it. The gap between concurrent and consecutive sentencing across multiple counts can be the difference between a genuinely long prison term and one that effectively resolves to just its longest single count.
  • Being sentenced in absentia doesn't end a case — it can trigger an arrest operation. Nigerian law permits sentencing to proceed even when a convicted person fails to appear, with enforcement following after.
  • Facing one conviction doesn't mean a defendant's legal troubles are over. Mamman's separate, still-pending fraud case at the FCT High Court is a reminder that high-profile figures can face multiple, independent prosecutions running on entirely different tracks.
  • High-profile corruption convictions in Nigeria remain comparatively rare, which is part of why cases like this one draw outsized public and legal attention when they conclude.

Related Reading

This case is part of a small cluster of recent Nigerian corruption sentencings worth reading together, since they all turn on the same underlying question — how a judge structures multiple counts into a single effective prison term:

This post is based on publicly available news reporting of a concluded criminal case and is intended for general informational purposes only. It does not reproduce the court's judgment directly and does not constitute legal advice. Details of court proceedings are subject to correction as further official information becomes available.

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