Uncle Karl is the law partner of Rheinhard Kraushaar, who Daniel has always called "uncle." Rheinhard takes Karl in as a young lawyer and teaches him the profession. When the Nazis begin to pressure Karl to force Rheinhard out of the practice because he is married to Sophie, Karl tries to convince Rheinhard to divorce her. He also offers Rheinhard a job at his brother's furniture factory, but Rheinhard refuses both proposals. Eventually Karl throws Rheinhard out of the practice.