Who is Rheinhard Kraushaar from Daniel Half Human and what is their importance?

Rheinhard Kraushaar is Daniel's father. He is described as a prominent and successful lawyer, and a veteran of World War I. He has even been honored with the Iron Cross for his distinguished service. As the Nazis increased their power, he continued to believe that his status as a prominent lawyer and war veteran would protect him and his family. Rheinhard holds on to this belief, even as he is forced out of his practice. A threat on Daniel's life, in addition to his own brutal beating at the hands of the Nazis, causes him to agree to leave Germany with his family. He dies shortly after reaching the United States.