Now reports are starting to come forward about this second detainee. Supposedly, according to the Dong A Ilbo... (which is a South Korean news source, and we know how reliable those are...) this man crossed the border because he wanted to join the North Korean army and escape from the capitalist world.
Sounds like a nice plan. Good luck to him if that really was his real motivation for entering NK. He's definitely as far from capitalism as you can possibly get. I bet working in a labor prison camp for no money and hardly any food is just what he had in mind.
I'll keep following this story to see if a more plausible explanation arises.