Update 21st January 2015 - UN dismisses North Koera's claim that damning human rights report is invalid - The Guardian.
On 21 March 2013, at its 22nd session, the United Nations Human Rights Council established the Commission of Inquiry on Human Rights in the Democratic People’s Republic of Korea (DPRK).
Resolution A/HRC/RES/22/13 mandated the body to investigate the systematic, widespread and grave violations of human rights in the Democratic People's Republic of Korea, with a view to ensuring full accountability, in particular for violations which may amount to crimes against humanity.
Among the violations to be investigated are those pertaining to the right to food, those associated with prison camps, torture and inhuman treatment, arbitrary detention, discrimination, freedom of expression, the right to life, freedom of movement, and enforced disappearances, including in the form of abductions of nationals of other States. Read more about the Commission...
The Commission's report and supporting documentation is HERE.
Although North Korea has been referred to as The Hidden Gulag the world has no excuse any longer to claim lack of knowledge of the North Korean situation of today.
The Democratic People's Republic of North Korea did not co-operate with the Commission's investigation. The Commission shared its findings with the North Korean government.
Wikipedia - North Korea - Political Prison Camps
International Coalition to Stop Crimes against Humanity in North Korea
The Hidden Gulag