Nice story and I hate to be the A hole here but,
Vivier was a private in the U.S. Marine Corps in 1965 and 1966, though he didn't see combat. He was stationed at Parris Island, S.C.
This guy's only duty was as a recruit. He either didn't make it through boot camp, or deserted afterward.
I would ASSUME the Ensign checked the records, but from the info in the story this guy does not deserve to be buried in Arlington , and if he did not finish boot camp he is not entitled to the title of Marine.