Sorry, I can’t find the actual date of the theft either. Tried a warrant search at the Clark County website but no luck.
KLAS (Las Vegas) may have been the original source:
https://www.8newsnow.com/investigators/energy-department-official-accused-of-stealing-luggage-from-las-vegas-airport/
Looks like it was July 6 at Harry Dingy. The authorities or the news orgs got around to it December 8th.
https://freerepublic.com/focus/news/4115360/posts?page=1