One of his first tweets says how it's funny that Twitter only recommend journalists to follow. He clearly is a new user, as he had his son set it up for him.
Just saying that it is strange. When I set up twitter for my mother (about the same age as this guy) the first thing that I did was show her how to follow somebody, and that person was me. Why doesn't he follow his son, or anybody else other than journalists? It just seems off imo.
Probably, because he said that he doesn't want to go into his family details. He wants to keep his identity secret. Also the fact that he didn't tell his company about his illness would be a justification.
Fair enough and good points.
All this establishes is that the person in question is not your mother.