The Office of the Special Prosecutor (OSP) has arrested the former Commissioner-General of the Ghana Revenue Authority (GRA), Rev. Dr. Ammishaddai Owusu-Amoah, along with two other former senior officials, in connection with ongoing investigations into contracts awarded to Strategic Mobilisation Ghana Limited (SML) for revenue assurance services.
The other individuals arrested are Isaac Crentsil, former Commissioner of Customs and now General Manager at SML, and Christian Tetteh Sottie, former Technical Advisor at the Ministry of Finance, who currently serves as the Managing Director and CEO of SML.
The trio was arrested on Tuesday, June 24, 2025, by operatives of the National Intelligence Bureau (NIB). They were subsequently detained in NIB custody after failing to meet their bail conditions.
A statement issued by the OSP on Wednesday, June 25, confirmed the arrests, noting that they are part of a broader probe into suspected corruption and corruption-related offenses surrounding agreements between the GRA and SML. The investigation also aims to verify claims made by SML regarding the revenue gains attributed to its services.
“The arrests are linked to ongoing investigations into suspected corruption and corruption-related offences in respect of contracts between the GRA and SML for revenue assurance services,” the OSP stated. “The probe will further assess the credibility of SML’s claims that its services have resulted in substantial revenue savings for the nation.”
According to sources, some of the suspects played pivotal roles in securing and managing the contracts in question, transitioning from public service roles at the GRA to leadership positions at SML shortly afterward.
Christian Tetteh Sottie previously served as Commissioner of Customs from 2017 to 2019 before being seconded to the Ministry of Finance as a Technical Advisor. He retired from the GRA in September 2022. Isaac Crentsil, before becoming Commissioner, led the Post Clearance Audit Unit at the Customs Division between 2015 and 2017.
The arrests mark a significant step in the OSP’s investigation into high-level corruption within public revenue administration and the operations of private contractors involved in national revenue monitoring.
Story By: Afia Ohenewaa Akyerem