As Nazi Germany fell the Allied Forces knew that some sort of system would need to be established in order to prevent chaos or potential uprisings. So the Allies made the call to bring in German citizens loyal to their side in order to maintain order. But not every German citizen agreed with their new occupation and felt even more betrayed by Germans who dealt with them.
After the Allies seized control of Aachen, Germany they sought to install a leader who did not sympathize with the Nazis. Franz Oppenhoff was a lawyer specializing in Nazi law who had previously been targeted by the Gestapo, was a good choice in the eyes of the Allies. Oppenhoff took office in October of 1944, following his appointment as mayor no photographs were permitted of him as a means of preventing harm. In the end, the may as well have just painted a bullseye on his head.
The leadership of Nazi Germany felt betrayed by Oppenhoff and Heinrich Himmler ordered a team of assassins to remove him from the picture. This elite team was known as the Werewolves consisted of two SS officers and for Nazi youth members. The group traveled in a captured B-17 before being dropped off in a Belgian forest, making their way to Oppenhoff’s location.
They found Mayor Franz Oppenhoff at a party near his home and the team prevented to be downed German pilots. Oppenhoff urged them to surrender to the Americans in order maintain their safety. Unfortunately, this would be Oppenhoff’s final act of kindness which was returned with a bullet to the head.
The Smithsonian Channel goes into deeper detail about the assassins of the German resistance in this clip.