Prosecutors suspect that Kim delivered Lee's messages to the military, including an instruction to hire "our people," which apparently refers to those friendly to his administration, when increasing the number of civilian employees of the cyber command.

Kim is also suspected of ordering the cyber command to post Internet comments positive about the government and the ruling party but negative about opposition parties. When leaving office, he also allegedly took military documents and presidential records with him without permission.

Kim has denied the charges against him, claiming that he was never involved in the military's political interference and that the increase in the number of civilian employees in the cyber command was part of cyberwarfare against North Korea.

The investigation of Kim is considered a final step toward ultimately investigating Lee. The former president has recently categorically denied any knowledge or involvement in the military's alleged political interference. (Yonhap)