Since then, neither he nor the North Korean regime had offered any details of the visit.
The 22-year-old was taken to University of Cincinnati Medical Center, where doctors say he is in a coma but in stable condition. In fact, North Korean's are super friendly and accommodating, if you let them into your world.
It was only a week ago, after a U.S. diplomatic effort, that they were told he had been in a coma since shortly after being incarcerated in March 2016 for stealing a political poster from a hotel.
Foreign nationals have also been detained on political grounds, including two USA university professors in Pyongyang who were arrested this year for allegedly plotting anti-state acts.
What happened next, and how Warmbier ended up in a coma, is still unclear. But the family wasn't buying the explanation. A CNN report said doctors found significant contractions and weakness in Warmbier's legs, though they are unsure of the cause. Secretary of State Rex Tillerson said Wednesday the U.S.is considering a ban on American travel to the isolated authoritarian state headed by dictator Kim Jong Un.
He said officials had counseled the family to not speak out about Otto's detention, to avoid antagonizing the North Korean regime. The North Koreans agreed to let Swedish diplomats visit the US detainees, including Warmbier.
A supporter of Mr Trump, Rodman appeared on the US Celebrity Apprentice, and earlier this week said he thought the President would be pretty happy about his visit.
On Monday, Yun and two physicians medically evacuated Warmbier. "My goal is to go over there and try to see if I can keep bringing sports to North Korea". He declared that he was "tremendously proud" of his son and heaped scorn on North Korea. Yun demanded his release, the White House claimed. "No other family should have to endure what the Warmbiers have".
Fred also said they followed the Obama administration to keep a low profile.
And Warmbier responded to questions from the media, in one instance saying: "The question is, do I think the past administration could have done more?"
A former teacher of an American college student released by North Korea in a coma says he's a fighter and believes he'll do everything he can to recover.
Fred Warmbier shared an emotional moment with supporters after he left the news conference. The earliest images of his brain they received from North Korea are dated April 2016, Kanter said.
Price said Thursday the Obama administration's efforts secured the release of at least 10 other Americans from North Korea.
"His neurological condition can best be described as a unresponsive wakefulness", said Kanter.
A hospital official from UC Health said later today three doctors will share an update on Otto's medical condition. "He has not spoken".
An MRI of his brain revealed "extensive loss of brain tissue in all regions of the brain", Kanter said, along with "profound weakness" in his leg and arm muscles.
"They just have no recognition", he said. The state-run Korean Central News Agency on Thursday said he had been sentenced to hard labour, but it did not comment on his medical condition.
The U.S., South Korea and others often accuse North Korea of using foreign detainees to wrest diplomatic concessions.
"Dennis Rodman had nothing to do with Otto", he said.