The Office of the Special Prosecutor (OSP) says it is assisting the United States Federal Bureau of Investigation (FBI) in securing the conviction of Ghanaian-American businessman Asante Kwaku Berko in a bribery case involving more than $1 million in payments to Ghanaian officials.
A federal jury in Brooklyn, New York, convicted Berko on August 6, 2026, of conspiring to pay and paying more than $1 million in bribes between 2014 and 2015.
The case relates to the development and financing of a power plant in Ghana under an agreement between the Republic of Ghana and Aksa Enerji Uretim A.S., a Turkish energy company and Goldman Sachs client.
Berko, a dual citizen of Ghana and the United States, previously served as Managing Director of Tema Oil Refinery and as an Executive Director in the Investment Banking Division of the US-based Goldman Sachs Group.
According to the OSP, the alleged bribe payments involved multiple Ghanaian officials and were connected to the power plant project.
The Ghanaian anti-corruption agency said it provided investigative and evidentiary assistance to the FBI through Ghana’s established mutual legal assistance framework.
The OSP said its contribution to the case was acknowledged by the United States Department of Justice (DoJ), which described Ghana’s assistance as providing “significant assistance to this prosecution.”
The OSP said the cooperation between the FBI and the Ghanaian agency took place largely behind the scenes, but the outcome demonstrates the importance of international collaboration in tackling corruption offences that cross national borders.
“This case highlights the effectiveness of international cooperation in combating cross-border corruption crimes,” the OSP said.
The agency added that the collaboration demonstrates “the importance of mutual legal assistance” in supporting investigations and prosecutions where evidence and alleged criminal conduct extend across jurisdictions.
Berko faces a maximum sentence of 30 years in prison. He is scheduled to be sentenced on November 10, 2026.
The OSP said the case underscores the value of cooperation between law enforcement and anti-corruption institutions in different countries in addressing corruption-related offences with international dimensions.
