RG Kar Hospital's ex-principal Sandip Ghosh gave "deceptive" answers during his polygraph test, CBI said. "As per report of CFSL (forensic report), his (Ghosh's) version has been found deceptive on certain important issues relating to this case," said CBI remand note. It further alleged that arrested police officer Abhijit Mondal tried to divert the investigation in the case.