The last guy that talked about rigged Diebold machines died in a plane crash before testifying. That one should have been investigated just as vigorously as this time.

http://www.democracynow.org/2008/12/22/republican_it_special...

Perhaps because even someone who would engage in and document a conspiracy to break organization rules via email wouldn't be dumb enough to do the same thing with breaking the law.

My guess would be that it was carried out by a different entity, i.e. some sub-faction of the campaign as opposed to occurring at the party level.