Fred and Cindy Warmbier, Otto's parents, sued North Korea over their son's death and were awarded $500 million by a USA judge.
Yun, accompanied by an emergency medicine doctor Michael Flueckiger flew to Pyongyang.
While the majority of Americans detained by North Korea have been released in relatively good condition, Warmbier, a student at the University of Virginia, died in June previous year shortly after he was flown home comatose after 17 months in captivity. North Korean officials asked him to examine Warmbier and write a report about his findings.
Warmbier was accused of stealing a sign from the hotel where he and fellow students had been staying in the capital, and was sentenced to 15 years' hard labour. Some are sniggering that President Trump reportedly OK'd the signature, as if he should have left the hostage to rot.
"Yes, my orders were completely: Do whatever you can to get Otto back", he told CNN. "I haven't paid them ten cents".
"The Western Wall was a truly incredible experience for me", he said.
Trump said later he held North Korea responsible for the young man's death.
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Credit goes to them, as they took full advantage of the opportunity by scoring four goals in short order to take a 4-3 lead. Regardless of whether or not the call was justified, five minutes were put on the powerplay clock, and the Sharks were off.
During the interview, Kinzinger said he doesn't think Trump paid the bill and "there's every indication he didn't".
"North Korea owed a debt to the Warmbier family for how they terribly mistreated their son and there were so many ways Otto was mistreated", he said.
Warmbier tragically passed away only days after his return, with what medical professionals could only speculate was a severe brain condition.
American student Otto Warmbier, center, is escorted at the Supreme Court in Pyongyang, North Korea, on March 16, 2016.
"They murdered him and the US isn't going to pay a ransom for that".
"I will take him at his word", Trump said.
The former official noted that the acceptance of the bill happened under Secretary of State Rex Tillerson, who was keen on opening up a dialogue with North Korea. In the end, he was released without paying any of it.