The Rockefeller tale begins with German con artist Christian Karl Gerhartsreiter (McCormack) coming to the U.S. in 1979 as a foreign exchange student. He used a series of aliases, impersonating a talk show host and a Pentagon adviser, among others. Gerhartsreiter soon became a fixture in Boston high society for more than a decade after he claimed to be Clark Rockefeller, an heir to the famo..