 Saprang was implicated in the resignation of Finance Minister Pridiyathorn Devakula on 28 February 2007 . The Bangkok Post reported that Pridiyathorn resigned in protest after a CNS member lobbied him to sell shares of IRPC ( formerly known as Thai Petrochemical Industry ) back to a former shareholder . The newspaper identified Saprang as the unnamed CNS member . Saprang 's brother , Chienchuang , was a key financial advisor to Prachai Liaophairat , the estranged founder of TPI . 
