These things have happened many times over the years. Korea, Vietnam, etc. Maybe like my brother who was M.I.A. in Vietnam. Who really knows? Some countries consider their enemies not as prisoners of war but criminals instead.
Hope he will get back to you soon.
It's been 49 years now. I highly doubt I'll ever see him again.
Such dramatic stories occur(ed) often in (present and past) history:
http://www.bbc.com/news/world-asia-india-38715056
http://www.hindustantimes.com/world-news/chinese-soldier-who-strayed-to-india-waited-54-years-for-bowl-of-spicy-shaanxi-noodles/story-Hf081Q51AyYaegsF54aN7K.html
About the Sino-Indian war:
https://en.wikipedia.org/wiki/Sino-Indian_War
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