:There are news reports  claiming that Bell boasted of making sarin and had a precursor.  There are some BLP issues to consider before believing them.  The second source is rather vague about it, and I suspect it may simply be based on the first.  The first (The Columbian) says that investigators said that two friends said that Bell said that he had made sarin.  Now the precursor chemical named in the story, diisopropyl fluorophosphate, is not listed by Wikipedia in our sarin synthesis recipe... 
 :The question we get into, in terms of WP:BLP, is whether "the allegations are presented as true".  I would guess that in this case, perhaps not.