The Office of the Special Prosecutor (OSP) has revealed the role it played in the conviction of Ghanaian-American businessman and former Goldman Sachs investment banker, Asante Berko, in a $1 million bribery case.
According to the OSP, they provided evidentiary assistance to the FBI to nail Asante Berko in a $1m Power plant bribery case.
The OSP disclosed that its assistance was provided through Ghana’s established mutual legal assistance framework and was acknowledged by the United States Department of Justice (DoJ).
The OSP said in a public notice issued on Monday, August 10, 2026 stated, “Conviction of Asante Kwaku Berko
International Cooperation in Action
On 6 August 2026, a federal jury in Brooklyn, New York, convicted Asante Kwaku Berko (a dual citizen of Ghana and the United States and former Managing Director of Tema Oil Refinery and former Executive Director in the Investment Banking Division of the U.S. based Goldman Sachs group) of conspiring to pay and paying more than $1m in bribes between 2014 – 2015 to multiple Ghanaian officials in connection with the development and financing of a power plant in Ghana under a deal between the Republic of Ghana and Aksa Enerji Uretim A.S., a Turkish energy company and Goldman Sachs client.
The Office of the Special Prosecutor (OSP) provided investigation and evidentiary assistance to the Federal Bureau of Investigation (FBI) of the United States through Ghana’s established mutual legal assistance framework. The involvement of the OSP has been acknowledged by the United States Department of Justice (DoJ) as providing “significant assistance to this prosecution”.
Berko faces a maximum sentence of 30 years in prison. The sentence will be handed down on 10 November 2026. This case highlights the effectiveness of international cooperation in combating cross-border corruption crimes. The cooperation between the FBI and the OSP on this case occurred behind the scenes, and its public outcome of a successful prosecution is a testament to the importance of mutual legal assistance”.
Meanwhile, Asante Kwaku Berko, the former Tema Oil Refinery (TOR) Managing Director, is facing up to 30 years in US prison after conviction in power plant bribery.
The former TOR MD was convicted by a federal jury in the United States over a bribery and money laundering scheme linked to a power plant project in Ghana.
Asante Kwaku Berko, a dual US-Ghanaian citizen, was convicted in Brooklyn on August 6, 2026, on all counts in the indictment, following a nine-day trial before US District Judge Diane Gujarati in the Eastern District of New York.
According to information gathered, Asante Berko and others conspired to pay more than US$1 million in bribes to Ghanaian government officials to help secure a multimillion-dollar power plant deal for Turkish energy company Aksa Enerji Uretim A.S.
The shady deal centres on a power plant deal that was under development and financing between December 2014 and July 2015.
Asante Berko, who was then an executive director in the investment banking division of Goldman Sachs at the time, was involved in managing the transaction between the bank’s client, Aksa Enerji, and the Republic of Ghana.
In July 2024, Asante Berko was extradited to the United States after living in the United Kingdom and being arrested in November 2022 following an Interpol Red Notice.
The US prosecution also accused him of using the American financial system to facilitate the movement of illicit payments connected to the deal.
Asante Berko was convicted of conspiracy to violate the Foreign Corrupt Practices Act (FCPA), violating the FCPA and conspiracy to commit money laundering.
He has since been remanded in custody pending sentencing, which is scheduled for November 10.
See the post below:
Conviction of Asante Kwaku Berko
— Office of the Special Prosecutor-Ghana (@ospghana) August 10, 2026
International Cooperation in Action
On 6 August 2026, a federal jury in Brooklyn, New York, convicted Asante Kwaku Berko (a dual citizen of Ghana and the United States and former Managing Director of Tema Oil Refinery and former Executive… pic.twitter.com/OgRDOch1ux
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