趙光祖
According to some accounts, the origin of Treason Case of 1589 goes back to the Third Literati Purge of 1519 during Jungjong's reign and the resulting grudge between two families. After Sarim's head Jo Gwang-jo was executed on framed charges in 1519, Right State Councillor Ahn Dang was dismissed for supporting Jo and his followers, among whom were his sons. In 1521, Song Saryeon, Ahn's family slave who rose to become a government official of senior fifth rank under Ahn Dang's patronage, reported to King Jungjong that Ahn Dang's son was conspiring to kill Chief State Councillor Nam Gon and Shim Jeong, instigators of the Third Literati Purge of 1519. He presented a guest list for funeral of Ahn's wife as the evidence of conspirators’ meeting. At least a dozen Sarim scholars including Ahn Dang and his family were killed in this event, called False Treason Case of 1521 ("Shinsa muok"·신사무옥), and Song Saryeon was rewarded with promotion to high rank and Ahn family's entire possession.