Regarding the Matter of Oswald's Body #5

Our cast arrive in Terlingua, Texas, looking to flee to Mexico, all the while wondering if they’ve been the good guys in all this, doing their patriotic duty, and whether they should stay and fight after all.
But with Frank and a hired killer to deal with, will there be any second chances? And just who is the shadowed figure overlooking Oswald’s exhumation in 1981?