Himmler's adjutant lived free for 20 years after shooting Polish Jews

By Harlan Pryce · August 9, 2026

For twenty years, this Waffen SS officer lived as a British asset in an official post while his role in shooting Polish Jews remained unpunished.

The file's catalogue entry records a man who lived three distinct lives: an adjutant to Heinrich Himmler, a British intelligence asset, and a convicted war criminal. Hans Zech-Nenntwitch, known to his handlers by the codename COLUMBINE and later by the alias Joachim Nansen, serves as a clinical example of the transactional nature of defection during and after the Second World War.

According to the record in KV 2/397 from The National Archives in the UK, Zech-Nenntwitch was a Waffen SS officer. His proximity to the center of the Reich's security apparatus—serving as an adjutant to Himmler—rendered him a high-value target for any service capable of flipping him. The catalogue entry notes that Zech-Nenntwitch was arrested by the Gestapo in 1943, allegedly for providing assistance to a Polish resistance group. Whether this "allegation" was a genuine ideological break or a convenient fiction crafted to facilitate his exit remains unsaid in the summary, but it provided the necessary friction to propel him out of Germany. He escaped and made his way to Britain via Sweden.

COLUMBINE

Once he arrived in Britain, the Security Service processed him not as a criminal, but as a resource. The catalogue entry states that Zech-Nenntwitch provided "much intelligence of value to the Allies." In the trade, "value" is a relative term; it usually means the asset knew where the bodies were buried or how the communications flowed. For a man who had worked in Himmler's immediate circle, the value was likely systemic.

Beyond passive intelligence, the British utilized Zech-Nenntwitch for active measures. The record notes he was used to "broadcast anti-Nazi material back to Germany." This was a standard play in the psychological warfare playbook—using a known insider to sow doubt and discord within the enemy's ranks. It is a particular kind of irony that a man of the Waffen SS would spend his days broadcasting the downfall of his former masters, though in these arrangements, the broadcaster is rarely motivated by a sudden conversion to democracy. He was trading his knowledge of the regime for a seat at the table of the victors.

Polish Resistance

Zech-Nenntwitch's transition from asset to citizen was managed with the pragmatism typical of the early Cold War. The record indicates that he was given an official post in the reconstruction of Germany. This was a common occurrence in the late 1940s and 1950s; the Allies often found that the only people capable of rebuilding a shattered state were the same people who had helped break it. The expertise required to run a ministry or a municipality did not vanish simply because the ideology had changed.

However, the ledger eventually came due. The catalogue entry records that Zech-Nenntwitch was eventually brought before a de-Nazification court. The ghosts of his previous life—specifically his role in "shooting Polish Jews"—caught up with him. In 1964, he was sentenced to four years' imprisonment.

This twenty-year gap between the war's end and his sentencing suggests a calculated patience on the part of the authorities, or perhaps a failure of memory that lasted until the political winds shifted. The Security Service's broader interest in such figures is evidenced by other records in the KV series, such as KV 4/334, which outlines the "Procedure for bringing to the UK alien defectors from Russian Intelligence Services," and files on Soviet assets like Georgiy Kislov (KV 2/2565). The machinery for absorbing defectors was well-oiled, regardless of the defector's moral standing, provided the intelligence yield justified the risk.

Four Months on the Run

Zech-Nenntwitch did not take his 1964 sentence with the resignation of a man who had already paid his debts. The record describes him as a "much-publicised escapee" from his prison in Brunswick. For a former SS officer and intelligence asset, the instinct to evade capture is a deeply ingrained habit. He spent four months on the run, a period that likely mirrored the clandestine movements of his youth, before finally giving himself up.

What remains missing from the catalogue entry is the specific nature of the "intelligence of value" he provided during his time as COLUMBINE. We see the result—the broadcasts, the post-war employment, the eventual trial—but the actual content of his debriefings remains shielded. The record leaves us with a man who was useful enough to be protected for two decades, yet disposable enough to be jailed once his utility expired.

Zech-Nenntwitch surrendered to the authorities after those four months of flight, ending a career defined by the art of the exit.