Vintu was imprisoned after a definitive Supreme Court ruling on January 24 sentenced him to two and a half years in prison for aiding and abetting a fugitive.
He was released from prison in May 2013 after serving a one-year sentence for blackmail.
Mid-June, Vintu was again sentenced to six years and two months in prison for embezzlement in the Petromservice case, but that ruling is not final.
He is also on trial for money laundering and embezzlement in a pyramid scheme in the 1990s, the National Investment Fund (FNI), which collapsed and defrauded 300,000 people.