Thank you for posting your question on History Hub!
That is an interesting hypothesis! For the most part, the National Archives maintains records created by the United States Government. However, we may have some useful information on the subject that may tie in to your research. The system of escape routes used by wanted Nazis, became known as "Ratlines." A quick search of the National Archives Catalog using the term "Nazi Ratlines" yielded the following results: https://catalog.archives.gov/search?q=Nazi%20Ratlines . You may find some helpful information in those records related to your topic. You can also expand your search by trying relevant search terms in your query.
We hope this information is helpful. Best of luck on your research!