I was arguing with a libtard friend of a friend on A$$book today about this. He posited that they were Christians spreading the word in NK and knew the consequences. Turns out only one was.
https://www.washingtonpost.com/news/worldviews/wp/2017/06/13/otto-warmbier-has-been-freed-but-3-other-americans-remain-prisoners-in-north-korea/?noredirect=on&utm_term=.f6847f6826ca
WaPo comments are sad...