Interesting - I wonder if the misspellings (he references "paradice") may be a lead.
You are amazing. Let's search all online forums and public bulletins for this misspelling in the area. This person seems to be very sure of this specific spelling. If he's ever used that word publicly and spelled in that way it should be useful right?
I'd never looked into the Zodiac stuff before but apparently this isn't the first time he's used that word with that spelling, so it isn't novel, unfortunately.