inmates were assigned to their specialties - price waterhouse castoff , michael prosser was assigned to record-keeping and spreadsheets ; citibank skimmer , grant burgess , focused on the banking industry ; ibm insider trader , gary donaldson , was assigned to the tech industry along with corporate data thief/pirate , raja singh ; garrett jones , a lilco head man that overcharged customers and then skimmed the overages to finance the purchase of his vacation house , cars , and boats , was the utilities analyst ; the oil and gas specialist , tex walters , had spent years at exxonmobil before the authorities realized that he was understating reserve numbers in order to jack up the price for consumers at the pump and in their homes ; the automobile industry was manned by william heller , an ex-ford executive , but no one ever listened to him and it was cloudy whether he had even committed a crime beyond laziness and stupidity in the first place ; the telecom industry was watched by roger everson , the ceo of a telecom company that had the record for the largest overstatement of earnings detected and prosecuted in u.s. recorded history before brad green 'went yard . '