Davis appointed von Clemm to the board of directors of Crusader Petroleum Industries and as head of Eurohandel, both of which were involved in Nazi oil imports used to build up the German war machine. Karl's brother, Werner, was also involved with Davis and Karl played a part in his brother's diamond smuggling operation, for which he was indicted in absentia in 1942.
Davis assigned von Clemm to the board of Crusader Petroleum Industries and as head of Eurohandel, both companies involved in Nazi oil imports used to support Germany's war effort. Karl's brother, Werner, was also associated with Davis, and Karl participated in his diamond smuggling operation, which led to an indictment absentia in 1942.