Parents of the 31-year-old postgraduate doctor who was allegedly raped and murdered in RG Kar Medical College and Hospital of West Bengal’s Kolkata said on Friday that chief minister Mamata Banerjee cannot “disown” her responsibility in the alleged attempt by the police and hospital staff to “destroy” evidence. West Bengal chief minister Mamata Banerjee.(HT_PRINT) “Everyone – Kolkata Police, the hospital administration and people’s representatives from the TMC – played an active role to hush up the ghastly incident so that truth does not come to light,” news agency PTI quoted the deceased medic’s mother telling a Bengali TV channel on Friday. She alleged that the concerned authorities attempted to shield the “main conspirators” behind the crime. She also alleged that the CBI failed to unearth the role of “all perpetrators” in the crime and overlooked the “larger conspiracy” aspect. The mother also said that Banerjee cannot “disown the failure of her administration” as she is in charge of the health and police departments. “The CM has to explain why the crime scene could not be …