When he was attending a PhD program in physics, the family called him with news
that his own father was ill. Oliver left school shortly thereafter and started running the family business. Even though he left physics, he continued to tutor children in the neighborhood in math and science.
After the factory shut down, he worked in various jobs. Finding him was easy, just walk down the street and poke your head into every little store. Third or fourth one, you would see him.