Sanjoy Roy, 33, the lone accused in the case, pleaded not guilty before the judge in a closed court on Friday in Kolkata, his lawyer Sourav Bandyopadhyay told AFP.
Former principal of RG Kar Medical College and Hospital Sandip Ghosh former officer in charge of the Tala police station Abhijit Mondal were the two main accused.
CM Mamata Banerjee on Monday announced her decision to transfer a section of Kolkata Police and the state health department top brass, including CP Vineet Goyal, from their respective positions.