Dixie City Jam (Abridged)

A FORGOTTEN NAZI SUB BRINGS OLD HATREDS TO THE SURFACE

They're out there, under the salt -- the bodies of German seamen who used to lie in wait at the mouth of the Mississippi for unescorted American tankers sailing from the oil refineries of Baton Rouge out into the Gulf of Mexico.

As a child, Dave Robicheaux had been haunted by the sailors' images; then, as a young college student, he'd discovered one of their sunken subs while scuba diving. Years later, in a New Orleans p…