A former sales executive at Insys Therapeutics who is seeking a new trial after a racketeering conviction has cited new evidence that he said shows his ex-lawyers at Weil, Gotshal & Manges kept him in the dark about potential conflicts posed by its simultaneous bankruptcy work for Insys.

Richard Simon was one of five defendants convicted for pushing doctors to prescribe Subsys, a super-potent and addictive painkiller. In his bid for a new trial in Boston federal court, he has argued that Weil could not represent him while working for Insys because the pharmaceutical company’s bankruptcy plans were inextricably linked to its cooperation with prosecutors, who were seeking a huge fine from the company.