Houtermans' wife and children escaped to the United States but Houtermans was imprisoned for two years, constantly at threat of death, and tortured in an effort to gain a confession of having been a saboteur.
Houtermans also had calculated not only the cross sections of a fast, or exploding, chain reaction, but the cost of various isotope separation methods, as well.
FritzHoutermans had been the "guest" of one too many state police organizations not to know what was expected of him if he wanted to survive.