On Thursday, experts will testify about the North Korea's vast gulag, estimated to hold 80,000 to 120,000 political prisoners, and about access to food in the country, where hundreds of thousands perished in the 1990s famine, and child stunting remains widespread.
Among the commission's various lines of inquiry, it is expected to probe the causes of the famine and to what extent it was due to natural disasters as the authoritarian regime of then-leader Kim Jong Il claimed or mismanagement.
Jin, 26, who has lived in the United States since 2008 and runs a charity for North Korean defectors, scoffed at the suggestion that the food shortages were due to natural causes, claiming that government officials drive BMWs and drink exotic whiskies while children die.
She recalled how the shortages became very serious in 1996 and she would return from school feeling dizzy from hunger. Her parents made clandestine trips north to China to get food. But her father was arrested, and according to a fellow detainee, was beaten and killed, although authorities claimed he was shot trying to escape.
The family's fortunes only got worse. In 1998, after Jin's elder sister went missing, her mother went to China to try and locate the sister. Jin, then age 10, was left with her grandmother and two younger siblings to care for their newly born baby brother. Because of the father's previous arrest, she said the family was shunned by neighbors when they begged for food.
"My baby brother died in my arms because we had nothing to eat. Because I was holding him so much he thought that I was his mom, so when I was feeding him water he was sometimes looking at me, smiling," Jin said, weeping.
She said her grandmother and her five-year-old brother also starved. The remaining family members fled to China, but were arrested several times and repatriated before gaining finally asylum in March 2008 with the help of Christian missionaries.
Rights activists criticize China for such deportations, saying it is a violation of a U.N. refugee convention that it is a signatory to. China claims the North Koreans are economic migrants. Jin gave a detailed account of beatings and torture inflicted by security officials both in North Korea and China.
While the U.N. commission's work has put a spotlight on the dire human rights conditions in North Korea long eclipsed by international concern over its nuclear weapons program it's not yet clear what actions the world body could take to punish the North.
Kirby told the U.N. General Assembly on Tuesday that when the commission delivers its final report, "the international community will be obliged to face its responsibilities and decide what concrete action it will take" to protect the North Korean people.
The North is currently subject to tough sanctions because of its nuclear and missile programs, barring it from trading in weapons or importing luxury goods.
Even if the panel concludes crimes against humanity have been committed, a referral to the International Criminal Court appears unlikely, as it would require the approval of the U.N. Security Council, where China has a veto.
