Black leather Tumi briefcase with brass plate

I lost my black leather Tumi briefcase yesterday around 3pm outside the Phoenix Art Museum on Central Ave, near the main entrance. It's a slim, 15-inch case with a slightly dented bottom-left corner, and the handle shows minor wear. A tan leather luggage tag is looped onto the handle, and there's a brass nameplate on the front that reads 'A. Rivera'. Inside are a few architecture project documents, a red-stitched inner pocket, and a silver USB drive. The charcoal-gray lining is intact and the zipper still works, but I'm really worried—the briefcase was a gift with sentimental value from a mentor. If you found it, please reach out through the app or via the email in this listing.