Hans Zech-Nenntwitch Shot Polish Jews Before Spying for Britain
By Constance Bell ·
Himmler's adjutant murdered civilians in Poland before escaping to Britain as a defector, a history held in the Security Service's Personal Files.
Polish Jews were shot by a man who would later be tasked with the reconstruction of their tormentors' empire. For the victims in Poland, the cost of Hans Zech-Nenntwitch's ambition was death; for the Allies, the cost was a dangerous reliance on a man of flexible loyalties.
Codename COLUMBINE
The file's catalogue entry for KV 2/396 records the trajectory of a man who navigated the highest circles of the Third Reich only to emerge as a tool for British intelligence. Zech-Nenntwitch was not a mere functionary; he served as a Waffen SS officer and an adjutant to Heinrich Himmler. To be in the inner orbit of the Reichsführer-SS required a particular brand of devotion—or a particular skill for survival.
According to the catalogue description, Zech-Nenntwitch's fall from grace began in 1943. He was arrested by the Gestapo, the very apparatus of terror he had served, on the grounds that he had allegedly helped a Polish resistance group. Whether this assistance was a genuine act of conscience or a calculated insurance policy against the inevitable collapse of the Nazi regime remains unstated in the archival summary. What is certain is that the arrest worked. Zech-Nenntwitch escaped the clutches of the Gestapo and made his way through Sweden, arriving in Britain as a defector.
The Security Service saw utility in the man. Under the codename COLUMBINE, Zech-Nenntwitch provided what the catalogue entry describes as "much intelligence of value to the Allies." He was not merely a source of secrets; he was weaponized. The record notes he was used to broadcast anti-Nazi material back into Germany, turning his voice into a psychological instrument against his former masters.
The 1946 Sentence
In the wake of the war, the Allies faced the paradox of the "useful" war criminal. The catalogue entry for KV 2/396 reveals that Zech-Nenntwitch was initially given an official post in the reconstruction of Germany. It is a telling detail of the era: a former adjutant to Himmler was placed in a position of authority to help rebuild a society from which the SS had sought to purge all perceived impurities.
This period of official patronage ended when the machinery of justice finally caught up with him. Zech-Nenntwitch was brought before a de-Nazification court. The charges were not related to his later broadcasts or his intelligence work for the British, but to the visceral brutality of the Holocaust. In 1946, he was sentenced to four years' imprisonment for his part in shooting Polish Jews.
The transition from a valued asset of the Security Service to a convicted murderer in a German cell highlights the precarious nature of the wartime defector. For a time, the value of the intelligence he provided outweighed the blood on his hands. Once the war ended and the immediate need for inside information vanished, the "value" of COLUMBINE shifted, and the crimes he had committed in Poland became the primary focus of the record.
A Four-Month Flight
Zech-Nenntwitch did not accept his sentence with the resignation of a broken man. The catalogue description notes that he became a "much-publicised escapee" from his prison in Brunswick. His flight from custody added a final, theatrical chapter to a life defined by evasion and aliases, including his use of the name Joachim Nansen.
His time as a fugitive was brief. After four months on the run, he gave himself up. The record leaves the motives for his surrender blank, but it closes the loop on a man who had spent a decade shifting shapes—from SS officer to Polish resistance sympathizer, from defector to intelligence asset, and finally from reconstruction official to prisoner.
Zech-Nenntwitch was not an isolated case of the Security Service managing compromised figures. Other entries in the PF series, such as KV 2/2778 regarding Franz Riemann or KV 2/4111 concerning the double agent Guy Burgess, demonstrate the breadth of the files maintained on those whose loyalties were transactional. While Riemann was suspected of working for the Russians after a 1948 arrest, and Burgess famously disappeared to Moscow in 1951, Zech-Nenntwitch represents a different kind of risk: the man who sells his soul to the highest bidder, regardless of which side of the fence he stands on.
The archive preserves the facts of his crime and his utility, but it does not explain how a man sentenced for the mass murder of Jews could have been entrusted with a role in Germany's reconstruction. The record ends with his surrender after four months in hiding.