Kolkata doc murder case: Accused in custody, then why a demand for CBI probe?

West Bengal CM Mamata Banerjee warned police to resolve the Kolkata doctor rape-murder case by Sunday or transfer it to the CBI. The victim’s family alleged a cover-up. The accused, a civic volunteer with police ties, was arrested, prompting nation-wide doctor protests. The case spurred demands for a CBI investigation and raised concerns about hospital security lapses.