Sorry to say that I don't know a thing about either person that you mentioned in your post. I am not even connected to the Ricker surname that I know of. I do a lot of re-posting of articles to help everyone that may be searching.
You might want to think about subscribing to the Gen-Newbie list. There are all sorts of people there that can guide you regarding your research, and you can ask them how you would go about finding what you would like to know.