The public backtracking by Shin Dong-Hyuk proves that the entirety of his description of life in a North Korean prison camp was "scripted by (his) masters," said a column on Pyongyang's government-run Uriminzokkiri website.
The website also said survivor reports published in a UN investigation into Pyongyang's human rights abuses must be "nullified" as they depended on "human scum" such as Shin.
The attack on Shin isn't surprising as Pyongyang harshly criticised him even before his recent retraction of some details in the 2012 book, "Escape from Camp 14."
Shin's earlier account helped drive international efforts to hold Pyongyang accountable for what's widely regarded as one of the world's worst human rights records.
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The book's author Blaine Harden said in a statement on his website over the weekend that Shin had changed the dates and places of some events described in the book, although he stuck to the most horrific elements about torture and imprisonment.
Multiple attempts to contact Shin today were unsuccessful.