With vote anonymity built into the system, there is no way to do after-the-fact analysis. You can have precincts with more votes than registered voters, but there is no remedy except to disallow all votes from that precinct.
If there is no security on the front end there is no security in elections. The democRATs like no security.
Many times in IL I had both R, D and LP sign affadavits that
a) They voted with no indication who they voted for
b) they voted and who they voted for
c) they did not vote.
Security on the front end means ground game preparation and ground game involvement.
d) I’ve had a Democrat precinct judge who was mad at the Ward committeeman...and my friend...prevent the precinct captain from voting on behalf of the no-shows.
e) Democrat precinct judge who had some sense of honesty request the Chicago Police to arrest the Democrat precinct captain for casting multiple votes on each machine at 5:50 am before the polls opened at 6 am.
(The Policeman refused. He said that he did not want to patrol the Chicago River, which I understood.)