The commission has also sent summons to four IAS officials who had served in various capacities during the tenure of the former CM. KN Venkatraman, who was Secretary I in the CM’s office, has been summoned on January 30. Dr S Vijayakumar who served as Secretary III to the CM is scheduled to appear on January 31. A. Ramalingam, the incumbent Commissioner of Arts and Culture, who served as Secretary IV to the CM, will appear on February 1. Jayashree Muralidharan, who was Additional Secretary to the CM, has been summoned on February 2.