Okoronkwo-Onuigbo, who was tried alongside Ibori’s sister, Christine Ibori-Ibie, was found guilty of money laundering and mortgage fraud and was sentenced to five years by Judge Christopher Hardy of a Southwark London Crown Court on June 7, 2010.
The two women were accused and subsequently convicted of handling proceeds of criminal transactions on behalf of Ibori while he was governor of Delta State.
The court however ordered that their sentences be served concurrently and Okoronkwo-Onuigbo was released in May.
The ex-convict has since returned to Nigeria and was seen in Abuja recently.
Ibori is presently in a UK prison where he is spending a 13-year jail term.