The CBI accused Kolkata police of altering the crime scene in the case of a post-graduate medic's rape and killing at RG Kar Medical College, leading to a delay in the investigation. Senior doctors and the victim's colleagues suspected a cover-up, requesting videography, which raised concerns. Solicitor General Tushar Mehta highlighted the issue in the Supreme Court, while senior advocate Kapil Sibal defended the Kolkata Police's actions, stating everything was properly documented. The case garnered national attention and sparked protests, leading to the transfer of the probe to the CBI by the Calcutta High Court.