What crime do you think he committed, and what is the evidence for this?
The NK allegation is that he went to an off-limits part of his hotel and tore a propaganda poster off the wall. NK released a dark, blurry video of a tallish but unrecognizable person that they claim shows Warmbier. He apologized for his actions (certainly he could have been coerced) at his trial. Obviously the penalty for minor vandalism, at worst, was outrageous. But not many people are claiming that NK made the whole thing up. What would be their motive for creating a major international incident out of thin air?
http://www.dailymail.co.uk/news/art...Korean-hotel-earning-15-years-hard-labor.html