Amid the ongoing rage over Kolkata Rape Horror, CBI has swing into action after the Calcutta HC transferred Kolkata rape-murder case to CBI. Former Principal of RG Kar Medical College and Hospital, Sandip Ghosh arrived at CBI office for 4th consecutive day on August 19. Sandip Ghosh is being questioned in connection with ongoing probe into Trainee Doctor’s rape and murder case. Earlier, the investigation agency has interrogated nursing staffs, ward boy and security guards working at RG Kar Hospital. CBI has intensified investigation as protests over horrific rape-murder of ‘Abhaya’ have erupted across India.