A dismembered eyeball can't be used successfully in any eye scanner. Its blood vessels would be empty and collapsed (eye scanners examine blood vessels which are as unique as a finger print--mentioned by Abby).
The dead marine's pulse can easily be seen on her neck after Ducky states she was 8-10 weeks pregnant.
The light traffic shown at the beginning of the show is more likely very early Saturday or Sunday, since all roads in the region have bumper to bumper traffic at 6:45 am, Monday thru Friday.
Palmer still does not know to use 24 hour military time.
There's no such thing as a photographic memory it's actually an idetic memory.