Don't know. Mark Newman and Nick Gillard in the bug wash at the start of the AC with Kevin, but as far as I know neither have been indentified as specific prisoners (the script just says "three prisoners"). And the body the Alien is nomming when Kevin finds it to start the bait and chase can't be identified as black or white (Newman is black).
Xeno Alpha may know more.
The book plays up the Vincent Enigma (TM).