There is a question that was closed by five people. The first to cast a close-vote is a diamond moderator.
My understanding is that if he had been a diamond moderator at the time of casting that vote, the question would have been closed instantly, and only he would have been listed as the closer.
Therefore, I assume he was made a moderator after casting that close-vote.
Even if that is indeed the case for this particular question, would there be any other technically possible reason for that?
"That" meaning: Five close-voters are listed and one of them (except for the last) has a diamond next to his name.