Hi,
Lt Vernon Martin is not mentioned as still missing, see
https://dpaa-mil.sites.crmforce.mil/dpaaOurMissing
But he is also not mentioned on
https://www.abmc.gov/database-search ????
On Fold3 the Application for headstone or marker for him can be found at
https://www.fold3.com/image/318498524
Best regards
Luc