Bruce Schneier summarizes the first documented case of election fraud using new electronic voting machines in his article [Election Fraud in Kentucky](http://www.schneier.com/blog/archives/2009/03/election_fraud.html):
> Five Clay County officials, including the circuit court judge, the county clerk, and election officers were arrested Thursday after they were indicted on federal charges accusing them of using corrupt tactics to obtain political power and personal gain.
They used a low-tech social engineering trick to commit their crime.