Lee Jae - man ( Yonhap ) The prosecution on Sunday questioned Lee Jae - man , the presidential administrative secretary , and prepared to summon the president ’ s brother Park Ji - man in the expanding case surrounding Chung Yoon - hoi . Chung is a former aide of President Park Geun - hye who is alleged to have meddled in state affairs . The allegations , which had floated around for some time as rumors , sparked off an investigation following news reports citing intelligence reports compiled by Cheong Wa Dae . The already convoluted scandal took an unexpected turn on Saturday when a key suspect killed himself , claiming his innocence . The suspect , a police inspector identified by the surname Choi , was accused of leaking Cheong Wa Dae documents in possession of Superintendent Park Gwan - cheon to the media . Park served in the presidential office until February , and the presidential office had initially accused him of being the main culprit .   Choi was found dead in his car in Icheon , Gyeonggi Province on Saturday . He had been released from custody on Friday . According to his family , who have requested an autopsy , Choi left a 14 - page note claiming his innocence . The officer ’ s brother has also claimed that Choi told him that the investigation was being conducted “ like a puzzle ” and that the prosecution was being controlled by Cheong Wa Dae . The prosecution , however , has said that the note did not mention the investigation and only contained Choi ’ s feelings toward his family . As for its questioning of Lee Jae - man , the prosecution said that he was summoned as a plaintiff , and that other presidential aides have not yet been summoned . Following the initial news report , Lee and a number of presidential aides filed a criminal complaint against the daily Segye Ilbo that broke the story . Since the investigation began , accusations have been flying between the concerned parties including Cheong Wa Dae , Chung , and those suspected of having had a hand in writing and leaking the documents in question . Cheong Wa Dae has since claimed that former presidential aide Cho Eung - cheon masterminded the developments . One of Cho ’ s former subordinates , however , has claimed that Cheong Wa Dae ’ s audit team tried to force him to sign false accounts of the events that placed the blame on Cho . Regarding Park Ji - man , the prosecution plans to question him as a reference witness . The president ’ s brother is rumored to have been engaged in a power struggle with Chung , and of having close relations with Cho and others Cheong Wa Dae accuses of manipulating the events that set off the investigation . By Choi He - suk ( cheesuk @ heraldcorp . com ) 미래 엘리트 를 위한 영어 신문 주니어 헤럴드 	 더 많 은 기사 보 러 가 기 → [ 코리아 헤럴드 홈페이지 ] [ 트위터 ] [ 페이스북 ] 	 구독 신청 1588 - 0533 	 <ⓒ KoreaHerald ( www . koreaherald . com ) 무단 전재 및 재 배포 금지 >