In a fresh twist to the sensational Sheena Bora murder case, key accused Indrani Mukerjea's former driver Shyamvar Rai on Wednesday (May 11) told a special CBI court here that he wants to turn approver and 'disclose certain truths about the commission of the offence.'Last week, Rai had written a two-page letter to the court stating that he wants to reveal the truth and had sought pardon in the case.When Special Judge H S Mahajan called Rai in the box today, he said, 'I am aware about the acts connected with the commission of the offence and was a participant to the murder (of Sheena).' When the judge asked him about the case, he told the court that Sheena was killed by strangulation. He also told the court that he was under 'no pressure, threat or coercion' to reveal the facts in the case and was 'repentant' for his act. The court directed CBI to file its reply on May 17 over Rai's plea to turn approver in the case. Rai was the first accused to be arrested in connection with the murder case in August 2015..