Such an analysis revealed the role of John Shelk, who regularly reported on Congressional meetings, sending all such meeting reports to Tim Belden. In fact, the visualization reveals that their conversation is completely one-sided, with John sending reports to Tim, with no back-traffic occurring. This is a bit suspicious. Clicking on Tim Belden then reveals that according to the database he hasn't sent ANY e-mails, but receives various legal reports from throughout the company.
This is an interesting occurrence to flag for increased investigation. It could be that Tim Belden's e-mails simply were not included in the annotation set given to the class, and this would be easy to check out (of course, ideally the interface would support this check already, a point for future improvement). Otherwise, might have his e-mails been expunged? If so why? It is clear that Tim Belden was receiving important information from throughout the organization -- what happens to this information subsequently? Is it being utilized outside of e-mail? This might highlight Tim Belden as a possibly interesting person for prosecutors investigating Enron.
After performing this analysis, I did a web search on Google for "Tim Belden". On my honor, I had never heard his name before doing this analysis exercise. Little did I know he was the first person charged by prosecutors, considered the "mastermind" of Enron's manipulation of California's markets, and was found guilty on charges of federal conspiracy. The full story is available at CBS News. Already, this bodes well for the potential of the system!