October 8, 1910 - Helmut Kallmeyer
His work sat at the intersection of technical expertise and state-sponsored mass killing — a chemist whose knowledge of gasification was applied not to industry but to the apparatus of genocide. Kallmeyer served as a consultant to Hitler's Chancellery, advising on methods that became central to the Nazi extermination program. The bureaucratic nature of his role reflects how the machinery of the Holocaust depended on specialists who lent professional competence to systematic murder.
From Wikipedia
Helmut Kallmeyer (8 October 1910 – 27 September 2006) was a German chemist in the era of National Socialism. He served as a consultant in Adolf Hitler's Chancellery (Kanzlei des Führers) for gasification methods. Later, he worked in the Technical Institute for the Detection of Crime (Kriminaltechnisches Institut der Sicherheitspolizei, KTI). He was involved in Action T4, Nazi Germany's program to murder people with disabilities.
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