That’s more of a rabbit hole than you might think, jokes aside.
“Operation Paperclip” brought thousands of “former” Nazis to the US in the 1940s - many people are aware of the German rocket scientists.
But huge numbers of chemical and biological warfare specialists, propaganda experts were also imported and went to work right away. Inmates and were popular subjects, apparently, and it wouldn’t surprise me if these experiments here were related and/or done under the aegis of some sort of government spook direction.
I also bought, but haven't yet read "Terrible Victory: First Canadian Army and the Scheldt Estuary (Holland) Campaign: September 13 - November 6, 1944" by Mark Zuehlke. The Scheldt area was near where my father was born in 1904. Although my father had already come to the U.S. in 1912 with his brothers and their parents, I visited the area in 2006, and wanted to get a better understanding of the Canadians' struggles to liberate that area from the Nazis. My father's village of Schoondijke, was destroyed by allied bombing during the war. About the only thing that was still standing once the war ended, was the windmill, which I got to see on my visit. The family that owned it during the war, hid downed allied pilots, and helped them get back to allied lines.