I have found him and have managed to engage him in conversation.. Everytime I ask him "1. ...", he sits down and the scene ends. I can restart the dialogue but I never get past this particular question.
I found a forum webpage cached by Google reporting a similar issue in beta. Is this a bug or what?
I'm having same problem. Every time I ask the question "where were you with...." (you have to ask this eventually) he just sits down without saying anything and without any further options to progress the quest.