If the throat wound was an entrance wound, what happened to the bullet? What happened to the bullet that entered the back of the neck?
Throat wound: CIA-issued ice bullet that melted. No exit wound.
Shallow back wound: Bullet fell out somewhere. Possibly CE 399, the magic bullet. No, that won't work. Well, it fell out somewhere. No, wait, it was an ice bullet, too.
Alignment between back wound and throat wound: Pure coincidence, there is no connection.
I have this all on good authority from Cliff Varnell at the Ed Forum.