His record indicates he enlisted in the Marine Corps Reserves in 1975. The Vietnam war ended in 1975 with the fall of Saigon. No way in hell and 18 year old got the training necessary to serve with any kind of Special ops unit in the time frame he claims. Just my two cents.
“I never represented myself in my book or otherwise as a Vietnam War veteran, was in the CIA, or murdered anyone.” – Frank Dux