That meeting was probably never on the official schedule. There are numerous ways to arrange such things off the books. The Gov's office can certainly provide the schedule which will give him plausible deniability, after which it's he said she said, unless another witness comes forward.
(If the above strikes you as too underhanded and sleazy, well, the whole affair is such. The lure of Amazon HQ2 was in play, remember.)
Just play that on the evening news every day until Amazon pays full death benefits and punitive fines to the Terry family.
Oh yeah, and arraign the director on criminal conspiracy charges. And the governor too.
Hope this stays in the news.
What he disputed (according to the article) was his personal involvement in the case, and his attendance at a particular meeting.
He did not dispute allegations of interference by state agencies, per se.
I find it interesting the whistle blower claims the governor attended a meeting where pressure was applied to back off the investigation. The Governor claims he never attended a meeting. Wouldn't this be an easy item to fact check by getting records of meeting attendees?