Both of the Fastow's were at Continental-Illinois when it failed?
Yes, clearly they had nothing to do with the reasons for the C-I failure. The Fastows were still up at Tufts or at Northwestern when it began.
However, they were there at least in the aftermath of the failure. That provided firsthand knowledge of what goes on when an entity fails and the feds are scrutinizing every memo and every signature. They got to see who got blamed and who slithered away. Valuable information.