The team assembled by Generalinspekteur für Spezialabwehr Hans-Adolf Prützmann, who was given the task by Himmler, was:
Untersturmführer-SS Herbert Wenzel
Austrian Unterscharführer-SS Josef "Sepp" Leitgeb
Former border Patrolman Karl-Heinz Hennemann
Former border Patrolman Georg Heidorn
Werwolf trainee 16-year-old Erich Morgenschweiss
Werwolf Hauptgruppenführerin Ilse Hirsch.
Plan
The team's plan was to move to their first base camp in dense woodlands along the German-Belgian frontier. Morgenschweiss and Hirsch, who knew the city well and acted as guide, would enter town and locate their target. After identifying his daily schedule, they would pass the information to Wenzel and Leitgeb. Following the assassination, the team would head east toward friendly lines. They were to stick to the plan even if separated. Traveling strictly at night, they would hide in forester and game warden cabins during daylight. All carried forged papers identifying them as members of the Reich’s Organisation Todtlabour force. If captured, they were to convince their interrogators that they were working on nearby border fortifications.
Assassination
On 20 March 1945 the team were flown in a captured, Luftwaffe-operated B-17 Flying Fortress from Hildesheim airfield near Hanover and parachuted around the village of Gemmenich. Upon landing they were discovered by a 20-year-old Dutch border guard, Joseph Saive, whom they shot. The team then made for 251 Eupener Strasse, where Oppenhoff lived with his wife Irmgard and their three children. He was away at a party so they asked the housekeeper to send for him. When Oppenhoff arrived, Wenzel—who had assured his accomplices he would do the shooting—lost his nerve. Leitgeb barked “Heil Hitler!”, grabbed the pistol and shot Oppenhoff dead. Escaping with Leitgeb, Hirsch tripped a buried landmine; she injured her knee and Leitgeb was killed.
Later life
After the war the surviving members of the Werwolf group were located. At trial in 1949, they were found guilty of killing Oppenhoff and sentenced to 1–4 years in prison. Hirsch was acquitted and another of the team members was never charged. Hirsch married and had two sons. In subsequent proceedings the convicted members saw their sentences reduced and finally completely quashed under the :de:Straffreiheitsgesetz 1954|Straffreiheitsgesetz 1954 on the grounds of "command emergency".