The connection to Kathy Nguyen is quite possible. I thought you meant Ottilie Lundgren (who was the much older woman from Connecticut).
I remember reading the articles you mentioned. I don't think Janco mentioned Nguyen by name, though his recital of what he said he overheard the Pakistanis say sounded like it referred to Nguyen. There was also a follow-up which said that Janco had failed a lie detector test (or maybe it just made the weaker statement that he "hadn't passed" the lie detector test, I'm not sure).
In any case, Janco's statement is an interesting lead, but it would seem to require some independent confirmation at this point.
So many false results come from lie-detector tests that I don't put much stock in the fact -- if it is a fact -- that Janco did not pass one.