The gruesome rape and murder of a post-graduate trainee doctor in Kolkata’s state-run R G Kar Medical College Hospital has turned murkier with a doctor having access to the autopsy report, alleging there could be more than one person involved in the rape-cum-murder. Already, CBI, on directions of Calcutta High Court, has begun its preliminary probe amidst allegations that circumstantial evidence were sought to be removed by carrying out urgent renovation of the room where the sordid act took place. On Tuesday, the High Court division bench of Chief Justice T S Sivagnanam and Justice Hiranmay Bhattacharya transferred the probe from Kolkata Police to CBI saying there was possibility of destruction of evidence.