Russian came to Thailand, got married to thai woman speaking tinglish, got "robbed" and left with a kid.
No woman I met will leave a child behind, so there's must be some clue why she left?
Also, Magdeev is NOT russian surname AFAIK
And at last - he's 57!
the best option would be to re-unity his son with thai family (he is khun thai isn't?) and deport that "master of boats" back to Mother Russia.