Portrait of Rene and Renate Guttmann standing outside. Mengele twins. In the fall of 1947 Renate was chosen by the chairman of Rescue Children, Inc., Herbert Tenzer, to travel to the United States with another Jewish orphan, Charles Karo, to raise money for Jewish children's homes in France. The children became the focus of considerable media attention and appeared on the cover of Life magazine. The twins were separated in the wars aftermath, but eventually reunited and adopted together.