It should be cut & dry.
Restate your policy on AI generated content.
State you are doing an investigation.
Then move on.
This particular wording leaves room for excuses for the continued use of AI summarizers/ writing assistants.
I'm not saying to actually do anything over the weekend.
I'm aware of Condé Nas's internal policies when an article gets pulled from Ars, there's a formal investigation to avoid slandering the writer & chain of trust their work passed through.