My GC was sponsored by a sole practitioner architectural firm. While the entire process was pending, I worked under G4 visa for another employer. I received my GC in August 2013. I was supposed to join the office. The same month (i.e. August 2012), the sole practitioner found out he was in terminal phase with metastatic cancer. He immediately ceased all operations. He passed away in early November that year. How can I prove the intent to work for the sponsoring employer since I did not really get to work due to this very unfortunate circumstance? Will this have a negative impact at the time of the citizenship interview? Thank you.