Related: Otto Warmbier Dies Days After His Return from North Korea 
 
 What doctors at the University of Cincinnati hospital did find was extensive brain damage that looked like it could have been caused by a long period of oxygen deprivation – the kind caused when something stops someone’s heart. He was home and we believe he could sense that.” 
 
 Warmbier was detained in North Korea in January 2016 and was accused of attempting to steal a political banner from the Yanggakdo International Hotel in Pyongyang. Doctors in Cincinnati said he had “severe injury to all regions of the brain” and was in a state of “unresponsive wakefulness.” 
 
 Before returning to the U.S., Warmbier had been serving a 15-year long prison sentence with hard labor for allegedly trying to steal a propaganda poster from Pyongyang while visiting North Korea on an organized tour. Warmbier’s family has not specified how he slipped from a comatose state to death, but said in a statement on Monday that the “awful torturous mistreatment” he endured while in captivity meant “no other outcome was possible.” 
 
 Relatives have said they were told by U.S. envoys that North Korean officials claimed Warmbier contracted botulism after his trial and lapsed into a coma after taking a sleeping pill. Warmbier’s father Fred said he didn’t believe that’s what happened to his son. But I believe it is quite clear that they have a heavy responsibility in the process that led to Mr. Warmbier’s death.” 
 
 Moon did not go as far as some U.S. politicians who said Kim Jong Un’s regime murdered Warmbier, but he strongly condemned the “unjust and cruel treatments to Mr. Warmbier.” 
 
 “Even today, there are many Korean nationals and American citizens who are detained in North Korea,” he said.
– When Otto Warmbier was returned from North Korea last week after being held for more than a year, he was in a state of "unresponsive wakefulness" but otherwise stable—until he died suddenly Monday. Now NBC News reports doctors are trying to figure out what happened. One expert says Warmbier's family may have decided not to treat a medical issue—such as pneumonia, or sepsis, or a urinary tract infection—given that Warmbier was unlikely ever to recover from his vegetative state. Another says Warmbier may have suffered a pulmonary embolism, with his long flight from North Korea making a blood clot more likely. Here's what else you need to know about Warmbier and North Korea following the 22-year-old's death: We should have more details on Warmbier's death late Tuesday or Wednesday when the coroner releases initial autopsy findings, Reuters reports. The Cavalier Daily reports the University of Virginia Student Council will hold a vigil for Warmbier at 9pm Tuesday on campus. "The thoughts and prayers of the University of Virginia Student Body are with the Warmbier family and all those who loved Otto," the council said in a statement. Warmbier's funeral will be held Thursday morning at Wyoming High School in Ohio, ABC News tweets. Despite Trump's apparent willingness to sit down with Kim Jong Un, experts say Warmbier's death dramatically reduces—if not outright kills—chances for an improved relationship between the US and North Korea. "There is going to be a lot of anger," the director of the US-Korea Institute at Johns Hopkins School of Advanced International Studies tells the New York Times. Time reports South Korean President Moon Jae-in condemned North Korea's "unjust and cruel treatment" of Warmbier without outright accusing its government of murder. "We cannot know for sure that North Korea killed Mr. Warmbier," Moon said. "But I believe it is quite clear that they have a heavy responsibility in the process that led to Mr. Warmbier's death."