Most accounts of Song are drawn from the memoirs of her sister, Song Hye-rang. Her former friend Kim Young-soon published her memoir I Am Song Hye-rim's friend, and revealed she and her family were sent to a concentration camp for ten years after she found out Hye-rim's secret, which resulted in the death of her children and parents and her husband being taken away and never seen again before she managed to defect to South Korea in 2003.[2][3][4][5]