I'm not sure anyone has ever figured out whether or not Zimmerman and Konig knew each other, but I think it is highly likely that they did. Sergio thinks Zimmerman did influence Konig, but so far as I know there has been no proof of that yet. Sergio was attempting to make contact with Dieter's son Peter, and about the time Sergio got the contact information, Peter died. I don't know if Sergio was ever able to talk or correspond with him. I don't know either whether or not a Konig family member has possession of any of Dieter's journals or notes.