I did find, however, a record of Herrmann’s overseas work, much of which he conducted while still employed with the LAPD. Having spent four months in 1967 training Thai police in counterinsurgency tactics, Herrmann returned to Asia in September 1968 to join the U.S. effort in South Vietnam. Documents from the National Archives in College Park, Maryland, listed him as a scientific “advisor” to the army. His responsibility was to train South Vietnamese police in “paramilitary techniques” to deploy against Viet Cong insurgents. None of the records described those techniques in any detail, but the
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