Chairman Wontumi, the Ashanti Regional Chairman of the New Patriotic Party, was granted GH¢50 million bail by EOCO on charges of causing financial loss to the state.
He was interrogated by EOCO after being initially invited by the CID for alleged illegal mining activities.
His lawyer, Andy Appiah Kubi, who disclosed this to Graphic Online's Justice Agbenorsi in Accra said his client was interrogated by the investigative body on charges of causing financial loss to the state.
The police enquiry bail by EOCO is to allow Boasiako to be temporarily released from police custody pending investigations.
The bail came after hours of interrogation at the EOCO head office in Accra last Tuesday. Mr Boasiako is said to have fallen ill after hours of interrogation.
Mr Appiah Kubi told Graphic Online that his client was working with EOCO officers to meet the bail conditions.
The arrest triggered an immediate reaction from scores of NPP supporters, including party executives who stormed the EOCO premises in protest, demanding his release.
They included the National Organiser, Henry Nana Boakye, and former Greater Accra Regional Minister, Titus Glover.
The military was subsequently deployed to ensure law and order at the EOCO office.