>>18761215 From the DoS FOIA reading room found reference to this article from 1998 complete with extensive bibliography:

'''CHEMICAL WEAPONS IN THE SUDAN:

ALLEGATIONS AND EVIDENCE'''

TL;DR the US govt is totally involved. Will read the entire thing later and see if there are highlights to poast.

https://www.nonproliferation.org/wp-content/uploads/npr/barlet61.pdf