Rani Kapur, former Chairperson of Sona BLW Precision Forgings Ltd (Sona Comstar), on Monday requested the UK authorities to conduct a thorough probe into her son Sunjay Kapur’s death, saying that his death may not have been natural or accidental, but may, in fact, have involved foul play, including the possibility of murder, abetment, conspiracy, fraud, and forgery.