Shin Dong-Hyuk, believed to be the only person born in a North Korean prison camp ever to have escaped, apologised on his Facebook page today, saying he had "forever wanted to conceal and hide part of my past".
Shin was born and spent the first 23 years of his life in a prison camp where, he recounted in the harrowing "Escape from Camp 14", he was tortured and subjected to forced labour before escaping in 2005.
But Shin recently changed some of the details in his story, Blaine Harden, the book's author, said on his website.
"On Friday Jan. 16, I learned that Shin... Had told friends an account of his life that differed substantially from my book," said Harden.
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"I contacted Shin, pressing him to detail the changes and explain why he had misled me," Harden said.
Shin told Harden that that some of the ordeals had been "too painful" for him to revisit and he had "altered some details" that he had thought would not matter, the Washington Post reported today.
"I... Forever wanted to conceal and hide part of my past. We tell ourselves that it's okay to not reveal every little detail, and that it might not matter if certain parts aren't clarified," he said.
"To those who have supported me, trusted me and believed in me all this time, I am so very grateful and at the same time so very sorry to each and every single one of you," he said.
Shin did not elaborate in the post on which part of his past had been fabricated. In Harden's book, Shin says he was brutally burned and tortured when aged 13, after a failed attempt to escape the camp.
Shin also said in the book he saw his mother and brother executed after he betrayed them, telling authorities in Camp 14 of their plan to escape in hopes of getting food as reward.
But, said the Washington Post, the executions actually took place when he and his family were in a different camp.