Rotory is referring to a well-reported case in the Detroit area precincts (the voting machines are at least two decades old and have become unreliable). First, in the majority of cases, there were fewer than 5 extra votes (in some cases, there were up to five fewer votes) recorded in the precincts under investigation. This was covered heavily in the press, but no one could find any evidence of wrongdoing: the scanning machines that count the number of ballots submitted were just too old to work properly (why would Detroit be able to afford new voting machines when they can't even afford to keep drinking water safe for consumption), or poll workers simply forgot to count some voters sometimes. No one could find evidence that this was part of a conspiracy. In other words, it was debunked.