The investigation against Rafael Ramirez comes one week after the former longtime head of state oil company PDVSA resigned from his UN post on orders from President Nicolas Maduro. Relations between the Venezuelan political heavyweights had become increasingly strained.
With oil production low and an economic crisis playing out, Maduro ordered a shake-up of PDVSA, the source of almost all of Venezuela's foreign currency earnings.
Chief prosecutor Tarek William Saab called Salazar a "direct partner of Rafael Ramirez" yesterday when he announced the investigation into Ramirez for links to the corruption scheme at the state oil company.
Ramirez, who was never part of Maduro's inner circle, is believed to have been the ultimate target of housecleaning at PDVSA, which he led for 12 years. He was later named as Venezuela's UN ambassador.
He did not respond to a request by The Associated Press seeking comment.
Ramirez had becoming increasingly critical of Maduro's government amid an unprecedented economic crisis, saying he felt the need to speak out on policies he knew a great deal about from tenure running PDVSA.
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