Complicitor: legal jargon or science fiction alien?

"Complicitor": a bit of legal jargon that I'd never heard before, but that is apparently quite popular in the courts of Colorado, Kentucky and Ohio (and very rare anywhere else). It is, of course, to complicity as aider and abettor is to aiding and abetting, or as conspirator is to conspiracy. (Note the -or on conspirator, abettor and complicitor, but the -er on aider.)