The Russian Prosecutor General's Office has completed an investigation into a new criminal case against the former head of YUKOS, Mikhail Khodorkovsky, who is being held in a pre-trial detention center in the city of Chita. “On Saturday, if the investigators are ready to present materials, the lawyers will begin studying the case,” Mikhail Khodorkovsky’s Chita lawyer Semyon Rosenberg told Interfax on Friday. Former Yukos head Mikhail Khodorkovsky and MENATEP head Platon Lebedev are accused of stealing oil worth more than 850 billion rubles.