New Delhi [India], August 20 (ANI): The Central Bureau of Investigation (CBI) on Tuesday dismissed a fake letter being circulated on social media in connection with the ongoing probe into the rape and murder of a trainee doctor at RG Kar Medical College in Kolkata. The letter, which is widely circulating on social media carries a signature from a person named “Dr Akash Nag”, ostensibly an Indian Police Service officer working in the CBI. The official statement reads, “A fake letter in the name of a person named Dr Akash Nag and claiming to be DIG, Joint Director, Crime Branch, Kolkata under th…