of the money might have come from. and at the center of it all, the man who called himself, lou castro. even for this veteran of the wars in afghanistan and iraq, according to the authorities, carried it stress. >> did you work with it? >> i did. but i decided this was something i have to do. and the chips will fall with a fall. >> it turns out the authorities were very interested in what ufc. >> yes. >> sold, in december, 2009, nearly seven years after the wichita investigation began, detectives goodwyn and snider, and the fbi agent sullivan, got their first break. the email from daniel. >> and in the email, he told us what he thought was happening. but the great thing about it was, for the first time we had somebody from the inside that could confirm some of our suspicions. >> so you guys really need to look at this guy, lou castro. and i'm get guess you get a hold call phone call? >> yes, we finally have a corroborating witness that will help us determine who lou