Yeah, maybe. Compare the list against a list of unlikely voters. Would be tricky to make sure no attempted double votes were cast. The theory is that these people were voted for, by mail? Or that an inside worker at the polls fed the votes into the machines? In the 2nd case maybe investigators could look at the times the “bullet ballot” votes were cast to see if there were irregularities indicating trouble, like them being clustered around certain times of day.