Well. The user's reaction when the news finally went mainstream - "Is this enough proof you fucking retards? I was right" - suggests to me he was just someone who got frustrated that his (correct) edits were being removed.

http://en.wikipedia.org/w/index.php?title=David_S._Rohde&...

If his intention was to help the man's captors spread the word, that edit wouldn't serve any purpose since he had already escaped. Though I suppose you could argue he wanted to stay "in character" for his own protection...