South Korean lawyer Kang Yong-suk, on behalf of Ko Yong Suk and her husband Lee Kang, said that they have filed suit against three North Korean defectors for spreading false information about Ko and her family.

Ko Yong Suk is the younger sister of Ko Yong Hui, the mother to Kim Jong Un and third wife of late North Korean leader Kim Jong Il.

In 1998, Ko and her husband chose to relocate from Switzerland to the U.S., according to a 2013 JoongAng Ilbo report.

The report noted that an anonymous South Korean intelligence source, who claimed that he had worked during