Otto Warmbier returned from North Korea to America but in comma.

Otto Warmbier returned from North Korea to America but in comma. He was a healthy young man when he was arrested in North Korea.
What has happened to him?
North Korean regime must be responsible for this crime.
Americans should never travel to North Korea. Their safety is not guaranteed in North Korea.

http://www.rfa.org/korean/in_focus/human_rights_defector/OttoWarmbier-06132017103600.html