The CBI said in their submission, “The extraction of data of mobile phones of both the accused persons has been received from CFSL, Kolkata and the same has been scrutinised… Evidence has come on record that the accused persons wanted to hush up and downplay the incident as there are a number of recorded incriminating calls as well as videos in the extracted data.”

The agency’s investigation into the “aspect of destruction/attempt to destruct of evidence and hushing up/downplay” is “still in full swing”, and relevant witnesses are being examined, the CBI said. Further, an in-depth investigation is being carried out to collect evidence on the “aspect of abetment/conspiracy/harbouring the main accused Sanjay Roy in the commission of this gruesome rape and murder.”

The CBI arrested both Ghosh and Mondal on September 14 in connection with the alleged tampering of evidence in the case and attempting to “hush up” the incident. They are both presently in judicial custody.

On Monday, the Sealdah court had framed charges against Sanjay Roy, the main accused, under Bharatiya Nyay Sanhita (BNS) sections 64 (rape punishable with rigorous imprisonment of life, not less than 10 years), 66 (punishment for causing death or resulting in a persistent vegetative state) and 103/1 (murder punishable with death or imprisonment for life) among others.

“I have been framed… I was not allowed to speak… I am completely innocent,” Roy had shouted while he was taken away by police from the courtroom on Monday.